Two wires of the same materical having equal area of cross-section have L and 2L. Their respective resistances are in the ratio

Two wires of the same materical having equal area of cross-section have L and 2L. Their respective resistances are in the ratio
by

1 Answer

Answer :

Two wires of the same materical having equal area of cross-section have L and 2L. Their respective resistances are in the ... `1:1` C. `1:2` D. `1:3`
by
selected by

Related questions

Two wires of the same material have resistances in the ratio ` 16 : 81` and lengths in the ratio ` 1 : 4`. Compare their radii of cross-section.

Description : Two wires of the same material have resistances in the ratio ` 16 : 81` and lengths in the ratio ` 1 : 4`. Compare their radii of cross-section.

Last Answer : Two wires of the same material have resistances in the ratio ` 16 : 81` and lengths in the ratio ` 1 : 4`. Compare their radii of cross-section.

Two wires of different materials have resistances in the ratio `4 : 3`, lengths in the ratio `2 : 1` but have same radii of cross-section. Compare the

Description : Two wires of different materials have resistances in the ratio `4 : 3`, lengths in the ratio `2 : 1` but have same radii of cross-section. Compare the

Last Answer : Two wires of different materials have resistances in the ratio `4 : 3`, lengths in the ... same radii of cross-section. Compare their resistivities.

The masses of the three wires of copper are in the ratio `5:3:1` and their lengths are in the ratio `1:3:5`. The ratio of their electrical resistances

Description : The masses of the three wires of copper are in the ratio `5:3:1` and their lengths are in the ratio `1:3:5`. The ratio of their electrical resistances

Last Answer : The masses of the three wires of copper are in the ratio `5:3:1` and their lengths are in the ratio `1:3:5`. The ... ):15:1` C. `1:15:125` D. `1:3:5`

If (log x)/(l + m - 2n) = (log y)/(m + n - 2l) = (log z)/(n + l - 2m), then xyz is equal to : -Maths 9th

Description : If (log x)/(l + m - 2n) = (log y)/(m + n - 2l) = (log z)/(n + l - 2m), then xyz is equal to : -Maths 9th

Last Answer : Let l+m−2nlogx​=m+n−2llogy​=n+l−2mlogz​=k(say) So, we get logx=k(l+m−2n) ....... (i) logy=k(m+n−2l) ....... (ii) logz=k(n+l−2m) ....... (iii) ∴logx+logy+logz=k(l+m−2n)+k(m+n−2l)+k(n+l−2m) ⇒logx+logy+logz=kl+km−2kn+km+kn−2kl+kn+kl−2km ⇒log(xyz)=0 ⇒logxyz=log1 ⇒xyz=1

If (log x)/(l + m - 2n) = (log y)/(m + n - 2l) = (log z)/(n + l - 2m), then xyz is equal to : -Maths 9th

Description : If (log x)/(l + m - 2n) = (log y)/(m + n - 2l) = (log z)/(n + l - 2m), then xyz is equal to : -Maths 9th

Last Answer : (b) 1Let \(rac{ ext{log}\,x}{l+m-2n}\) = \(rac{ ext{log}\,y}{m+n-2l}\) = \(rac{ ext{log}\,z}{n+l-2m}\) = k. Thenlog x = k(l + m – 2n), log y = k(m + n – 2l); log z = k(n + l – 2m) ⇒ log x + log y + log z = k(l + m – 2n) + k(m + n – 2l) + k(n + l – 2m)⇒ log(xyz) = 0 ⇒ log(xyz) = log 1 ⇒ xyz = 1.

Two wires a and b, each of length 40 m and area of cross-section `10^(-7) m^(2)` , are connected in series and a potenital difference of 60 V is appli

Description : Two wires a and b, each of length 40 m and area of cross-section `10^(-7) m^(2)` , are connected in series and a potenital difference of 60 V is appli

Last Answer : Two wires a and b, each of length 40 m and area of cross-section `10^(-7) m^(2)` ... resistance, (ii) electric-field and (iii) current-dentsity.

A bar L metre long and having its area of cross-section A, is subjected to a gradually applied tensile load W. The strain energy stored in the bar is (A) WL/2AE (B) WL/AE (C) W²L/AE (D) W²L/2AE

Description : A bar L metre long and having its area of cross-section A, is subjected to a gradually applied tensile  load W. The strain energy stored in the bar is  (A) WL/2AE (B) WL/AE (C) W²L/AE (D) W²L/2AE

Last Answer : (D) W²L/2AE

Find the current when the magnetic field intensity is given by 2L and L varies as 0->1. a) 2 b) 1 c) 0.5 d) 0

Description : Find the current when the magnetic field intensity is given by 2L and L varies as 0->1. a) 2 b) 1 c) 0.5 d) 0

Last Answer : b) 1

The vertical reaction for the arch is (A) wa/2l (B) wl/a (C) wa/l (D) wa²/2

Description : The vertical reaction for the arch is  (A) wa/2l (B) wl/a (C) wa/l (D) wa²/2

Last Answer : (A) wa/2l

If is the difference in height between end points of a chain of length , the required slope correction is (A) h²/2l (B) h/2l (C) h²/l (D) 2h²/2l

Description : If is the difference in height between end points of a chain of length , the required slope correction is (A) h²/2l (B) h/2l (C) h²/l (D) 2h²/2l

Last Answer : (A) h²/2l

In a off centre point loaded fixed beam total moment is a. Wab / L b.Wab / 2L c. Wab / 3L

Description : In a off centre point loaded fixed beam total moment is a. Wab / L b.Wab / 2L c. Wab / 3L

Last Answer : a. Wab / L

he acentric factor of a materical, 'ω', is defined as ω = -log10(Prsat)Tr- 1 = 0.7, where, Prsat = reduced vapor pressure, Tr = reduced temperature. The value of acentric factor is always (A) > 2 (B) < 1 (C) > 1 (D) < 3

Description : he acentric factor of a materical, 'ω', is defined as ω = -log10(Prsat)Tr- 1 = 0.7, where, Prsat = reduced vapor pressure, Tr = reduced temperature. The value of acentric factor is always (A) > 2 (B) < 1 (C) > 1 (D) < 3

Last Answer : (B) < 1

Ab and Ac are the cross sections of bronze and copper bars of equal lengt b c are their respective stresses due to load P. If Pb and Pc are the loads shared by them, (where Eb and Ec are their modulii). (A) b c = Eb /Ec (B) P = Pb + Pc (C) P = Ab b + Ac b (D) All the above

Description : Ab and Ac  are the cross sections of bronze and copper bars of equal lengt b c  are their  respective stresses due to load P. If Pb and Pc  are the loads shared by them, (where Eb and Ec  are  their modulii) ... /Ec (B) P = Pb + Pc (C) P = Ab b + Ac b (D) All the above 

Last Answer : (D) All the above 

A wire of uniform area of cross-section A length L and resistance R is cut into two parts. Resistivity of each part a. remains the same b. is doubled c. is halved d. becomes zero

Description : A wire of uniform area of cross-section A length L and resistance R is cut into two parts. Resistivity of each part a. remains the same b. is doubled c. is halved d. becomes zero

Last Answer : a. remains the same

If At is the area of steel cross-section, t is working stress, L is width of road and W is weight of slab per square metre, the spacing of the tie bars for a longitudinal joint, is (A) (100 At × t)/WL (B) 100 At/tWL (C) (100 WAt × t)/tL (D) 100 WL/At t

Description : If At is the area of steel cross-section, t is working stress, L is width of road and W is weight of slab per square metre, the spacing of the tie bars for a longitudinal joint, is (A) (100 At × t)/WL (B) 100 At/tWL (C) (100 WAt × t)/tL (D) 100 WL/At t

Last Answer : Answer: Option D

The total surface area of a cone whose radius is r/2 and slant height 2l is -Maths 9th

Description : The total surface area of a cone whose radius is r/2 and slant height 2l is -Maths 9th

Last Answer : Total surface area of cone = πr(r+l) Given, radius = r/2​ and slant height = 2l Therefore, new total surface area of cone = πr/2​(r​/2+2l) = π(r/4^2​+rl) = πr(l+r/4​)

The total surface area of a cone whose radius is r/2 and slant height 2l is -Maths 9th

Description : The total surface area of a cone whose radius is r/2 and slant height 2l is -Maths 9th

Last Answer : Radius (r)=r/2 & slant height=2l TSA (S)=PIE R (l+r) =22/7×r/2(2l+r/2) =11/7×r(2l+r/2)

Two wires of the same radius & material having length in the ratio of 1 : 2 are stretched by the same force. The strain produced in the two wires will be in the ratio of (A) 1 : 1 (B) 1 : 2 (C) 2 : 1 (D) 1 : 4

Description : Two wires of the same radius & material having length in the ratio of 1 : 2 are stretched by the same force. The strain produced in the two wires will be in the ratio of (A) 1 : 1 (B) 1 : 2 (C) 2 : 1 (D) 1 : 4

Last Answer : Option A

A car and lorry are both moving with equal kinetic energy. If equal breaking force is applied on both, then before coming to rest the (a) Car will cover a greater distance (b) Lorry will cover a greater distance (c) Both will cover the same distance (d) The distance covered by them will depend only on their respective velocities

Description : A car and lorry are both moving with equal kinetic energy. If equal breaking force is applied on both, then before coming to rest the (a) Car will cover a greater distance (b) Lorry ... will cover the same distance (d) The distance covered by them will depend only on their respective velocities

Last Answer : Ans:(c)

State significance of earthing. Draw and explain pipe earthing. State the values of earth resistances for : (i) Substation (ii) Residential wiring (iii) H.T. Line (iv) L.T. Line

Description : State significance of earthing. Draw and explain pipe earthing. State the values of earth resistances for : (i) Substation (ii) Residential wiring (iii) H.T. Line (iv) L.T. Line

Last Answer : Significance of earthing:  * Earthing means connecting the body of the electrical equipment (it means the part which does not carries current under normal condition) to the earth. For example electrical equipment' ... surrounded by charcoal and salt.  the values of earth resistances for: 

What is the respective ratio of the number of girls enrolled in only Painting classes to the number of boys enrolled in the same ? (1) 77 : 26 (2) 21 : 73 (3) 26 : 77 (4) 73 : 21 (5) None of these

Description : What is the respective ratio of the number of girls enrolled in only Painting classes to the number of boys enrolled in the same ? (1) 77 : 26 (2) 21 : 73 (3) 26 : 77 (4) 73 : 21 (5) None of these

Last Answer : (3) 26 : 77

In 2001, the respective ratio of number of appeared candidates to qualified candidates was 5:2. Number of female candidates qualified in 2001 constitutes what percent of the number of appeared candidates in the same year?

Description : In 2001, the respective ratio of number of appeared candidates to qualified candidates was 5:2. Number of female candidates qualified in 2001 constitutes what percent of the number of appeared candidates in the same year?

Last Answer : 15%

In 2003, if the number of female qualified candidates was 70, what was the respective ratio of number of female qualified candidates and number of male qualified candidates same year? A. 5:9 B. 7:11 C. 10:11 D. 10:13 E. 5:7

Description : In 2003, if the number of female qualified candidates was 70, what was the respective ratio of number of female qualified candidates and number of male qualified candidates same year? A. 5:9 B. 7:11 C. 10:11 D. 10:13 E. 5:7

Last Answer : E. 5:7

P and Q together can complete a job in 30 days. Q and R together can complete the same job in 40 days. P and R together can complete the same job in 40 days. What is the respective ratio of the number of days taken by P when completing the same job alone to the number of days taken by R when completing the same job alone? a) A.2:5 b) B.1:2 c) C.3:4 d) D.2:3

Description : P and Q together can complete a job in 30 days. Q and R together can complete the same job in 40 days. P and R together can complete the same job in 40 days. What is the respective ratio of the number of days taken by P ... R when completing the same job alone? a) A.2:5 b) B.1:2 c) C.3:4 d) D.2:3

Last Answer : B Efficiency of P and Q= 1/30 per day ___________1 ⇒ Efficiency of Q and R = 1/40 per day_________2 ⇒ Efficiency of R and P = 1/40 per day _________3 Taking equation 2 and 3 together ⇒ Q + R = ... 120 days he they work alone. ⇒ Ratio of number of days in which P and R can complete the job 1:2.

In case of binary distillation, increasing the reflux ratio above optimum does not result in the increase of (A) Area between operating line and 45° diagonal x-y diagram (B) Condenser and reboiler surfaces (C) Tower cross-section (D) None of these

Description : In case of binary distillation, increasing the reflux ratio above optimum does not result in the increase of (A) Area between operating line and 45° diagonal x-y diagram (B) Condenser and reboiler surfaces (C) Tower cross-section (D) None of these

Last Answer : (A) Area between operating line and 45° diagonal x-y diagram

The ratio of the area of cross-section of a circular section to the area of its core, is (A) 4 (B) 8 (C) 12 (D) 16

Description : The ratio of the area of cross-section of a circular section to the area of its core, is  (A) 4  (B) 8  (C) 12  (D) 16 

Last Answer : (D) 16 

Slenderness ratio of a long column, is (A) Area of cross-section divided by radius of gyration (B) Area of cross-section divided by least radius of gyration (C) Radius of gyration divided by area of cross-section (D) Length of column divided by least radius of gyration

Description : Slenderness ratio of a long column, is  (A) Area of cross-section divided by radius of gyration  (B) Area of cross-section divided by least radius of gyration  (C) Radius of gyration divided by area of cross-section  (D) Length of column divided by least radius of gyration 

Last Answer : (D) Length of column divided by least radius of gyration 

Viscous force is the __________ of shear stress due to viscosity and cross-section area of flow. (A) Sum (B) Different (C) Product (D) Ratio

Description : Viscous force is the __________ of shear stress due to viscosity and cross-section area of flow. (A) Sum (B) Different (C) Product (D) Ratio

Last Answer : Answer: Option C

The most critical consideration in the design of a rolled steel column carrying axial loads is the (a) Percentage elongation at yield and the net cross-sectional area (b) Critical bending strength and axial yield strength of material (c) Buckling strength based on the net area of the section and percentage elongation at ultimate load (d) Compressive strength based on slenderness ratio and gross cross-sectional area.

Description : The most critical consideration in the design of a rolled steel column carrying axial loads is the (a) Percentage elongation at yield and the net cross-sectional area (b) Critical bending ... at ultimate load (d) Compressive strength based on slenderness ratio and gross cross-sectional area.

Last Answer : (d) Compressive strength based on slenderness ratio and gross cross-sectional area.

The slenderness ratio is the ratio of (a) Length of column to least radius of gyration (b) Moment of inertia to area of cross-section (c) Area of cross-section to moment of inertia (d) Least radius of gyration to length of the column

Description : The slenderness ratio is the ratio of (a) Length of column to least radius of gyration (b) Moment of inertia to area of cross-section (c) Area of cross-section to moment of inertia (d) Least radius of gyration to length of the column

Last Answer : (a) Length of column to least radius of gyration

Sphericity is the ratio of the surface area of a spherical particle having the same volume as the particle to the surface area of the particle. Which of the following has the maximum value of sphericity? (A) Sphere(B) Cube(C) Cylinder (L/D = 1)(D) Raschig rings

Description : Sphericity is the ratio of the surface area of a spherical particle having the same volume as the particle to the surface area of the particle. Which of the following has the maximum value of sphericity? (A) Sphere (B) Cube (C) Cylinder (L/D = 1) (D) Raschig rings

Last Answer : (A) Sphere

In a reinforced concrete column, the cross –sectional area of steel bar is as and that of concrete ia AC; the equivalent area of the section n terms of concrete is equal to. (a) As+mAc (b) Ac+mAs (c) As-mAc (d) Ac-mAs

Description : In a reinforced concrete column, the cross –sectional area of steel bar is as and that of concrete ia AC; the equivalent area of the section n terms of concrete is equal to. (a) As+mAc (b) Ac+mAs (c) As-mAc (d) Ac-mAs

Last Answer : (b) Ac+mAs

Elongation of a bar of uniform cross section of length ‘L’, due to its own weight ‘W’ is given by a. 2WL/E b. WL/E c. WL/2E d. WL/3E Where, E=Young’s modulus of elasticity of material

Description : Elongation of a bar of uniform cross section of length ‘L’, due to its own weight ‘W’ is given by a. 2WL/E b. WL/E c. WL/2E d. WL/3E Where, E=Young’s modulus of elasticity of material

Last Answer : c. WL/2E

Write four requirements of good formwork and draw a sketch showing cross section of formwork for a L-shaped column.

Description : Write four requirements of good formwork and draw a sketch showing cross section of formwork for a L-shaped column.

Last Answer : i. It should be strong enough to resist the weight of concrete, workers and machinery. ii. It should be economical compared to total cost of construction. iii. It should be possible to use the ... available. vii. It should be rigid enough to retain its shape without deflection or bulging.

Two wires A and B of the same material have their lengths in the ratio `1 : 5` and diameters in the ratio ` 3 : 2`. If the resistance of the wire B is

Description : Two wires A and B of the same material have their lengths in the ratio `1 : 5` and diameters in the ratio ` 3 : 2`. If the resistance of the wire B is

Last Answer : Two wires A and B of the same material have their lengths in the ratio `1 : 5` and diameters in ... `180 Omega`, find the resistance of the wire A.

Two wires of the same material but of different diameters carry the same current `i`. If the ratio of their diameters is `2:1` , then the correspondin

Description : Two wires of the same material but of different diameters carry the same current `i`. If the ratio of their diameters is `2:1` , then the correspondin

Last Answer : Two wires of the same material but of different diameters carry the same current `i`. If the ratio of their diameters is ... `1:1` C. `1:2` D. `1:4`

how do I replace a camshaft synchronizer on a 1998 ford 4.2L

Description : how do I replace a camshaft synchronizer on a 1998 ford 4.2L

Last Answer : Need Answer

A conducting stick of length 2L and mass m is moving down a smooth inclined plane of inclination `60^(@)` with constant speed 5m/s. A current 2A is fl

Description : A conducting stick of length 2L and mass m is moving down a smooth inclined plane of inclination `60^(@)` with constant speed 5m/s. A current 2A is fl

Last Answer : A conducting stick of length 2L and mass m is moving down a smooth inclined plane of inclination `60^(@)` with ... )/(4L)` D. `(sqrt(3)mg)/(2L)`

An isolated load W is acting at a distance a from the left hand support, of a three hinged arch of span 2l and rise h hinged at the crown, the horizontal reaction at the support, is (A) Wa/h (B) Wa/2h(C) 2W/ha(D) 2h/W

Description : An isolated load W is acting at a distance a from the left hand support, of a three hinged arch of  span 2l and rise h hinged at the crown, the horizontal reaction at the support, is  (A) Wa/h  (B) Wa/2h (C) 2W/ha (D) 2h/W

Last Answer : (B) Wa/2h

If is the difference in level between end points separated by , then the slope correction is [(h²/2l) + (h 4 /8l3 )]. The second term may be neglected if the value of in a 20 m distance is less than (A) ½ m (B) 1 m (C) 2 m (D) 3 m

Description : If is the difference in level between end points separated by , then the slope correction is [(h²/2l) + (h 4 /8l3 )]. The second term may be neglected if the value of in a 20 m distance is less than (A) ½ m (B) 1 m (C) 2 m (D) 3 m

Last Answer : (D) 3 m

Anwar and Bhaskar started a business with investments of Rs.15000 and Rs.24000. At the end of 4 months from the start of the business, both withdrew one-third of their respective capital. Find the ratio of their profits in the total profit at the end of one year. a)1:2 b)3:4 c)4:5 d)5:8

Description : Anwar and Bhaskar started a business with investments of Rs.15000 and Rs.24000. At the end of 4 months from the start of the business, both withdrew one-third of their respective capital. Find the ratio of their profits in the total profit at the end of one year. a)1:2 b)3:4 c)4:5 d)5:8

Last Answer : d)5:8

The monthly incomes of A and B are in the ratio 4:5, their expenses are in the ratio 5 : 6. If 'A' saves Rs.25 per month and 'B' saves Rs.50 per month, what are their respective incomes? A) Rs.400 and Rs.500 B) Rs.240 and Rs.300 C) Rs.320 and Rs.400 D) Rs.440 and Rs.550 E) NONE

Description : The monthly incomes of A and B are in the ratio 4:5, their expenses are in the ratio 5 : 6. If 'A' saves Rs.25 per month and 'B' saves Rs.50 per month, what are their respective incomes? A) Rs.400 and Rs.500 B) Rs.240 and Rs.300 C) Rs.320 and Rs.400 D) Rs.440 and Rs.550 E) NONE

Last Answer : Answer: A Let AA's income be = 4x AA's expenses, therefore = 4x–25 Let BB's income be = 5x BB's expenses, therefore = 5x–50 We know that the ratio of their expenses = 5:6 ⇒24x−150=25x−250 ⇒ Therefore, x=100 A's income =4x=400 and B's income =5x=500 

The areas of cross-section of a square beam and a circular beam subjected to equal bending moments, are same. (A) Circular beam is more economical (B) Square beam is more economical (C) Both the beams are equally strong (D) Both the beams are equally economical

Description : The areas of cross-section of a square beam and a circular beam subjected to equal bending  moments, are same.  (A) Circular beam is more economical  (B) Square beam is more economical  (C) Both the beams are equally strong  (D) Both the beams are equally economical 

Last Answer : (B) Square beam is more economical 

A wires PQRS carrying a current I runs along three edges of a cube of side l as shown in figure. There exists a uniform magnetic field of magnitude B

Description : A wires PQRS carrying a current I runs along three edges of a cube of side l as shown in figure. There exists a uniform magnetic field of magnitude B

Last Answer : A wires PQRS carrying a current I runs along three edges of a cube of side l as shown in figure. There exists ... sqrt(3)IB` C. `sqrt(2I) lB` D. 2Ilb

At FOBs in electrified section the electrocution by live OHE wires is prevented by providing a) smoke gaurds b) Roofing c) Bottom lateral bracings d) protective screens*

Description : At FOBs in electrified section the electrocution by live OHE wires is prevented by providing a) smoke gaurds b) Roofing c) Bottom lateral bracings d) protective screens*

Last Answer : d) protective screens*

Two wires of same length are shaped into a square and a circle. If they carry same current, ratio of the magnetic moment is

Description : Two wires of same length are shaped into a square and a circle. If they carry same current, ratio of the magnetic moment is

Last Answer : Two wires of same length are shaped into a square and a circle. If they carry same current, ratio of the magnetic ... `pi:2` C. `pi:4` D. `4:pi`

A metallic wire of length 1 m is stretched to duble its length. Calculate the ratio of its initial and final resistances assuming that there is no cha

Description : A metallic wire of length 1 m is stretched to duble its length. Calculate the ratio of its initial and final resistances assuming that there is no cha

Last Answer : A metallic wire of length 1 m is stretched to duble its length. Calculate the ratio of its ... there is no change in its density on stretching.

Three resistances `2 Omega, 3 Omega` and `4 Omega` are connected in parallel. The ratio of currents passing through them when a potential difference i

Description : Three resistances `2 Omega, 3 Omega` and `4 Omega` are connected in parallel. The ratio of currents passing through them when a potential difference i

Last Answer : Three resistances `2 Omega, 3 Omega` and `4 Omega` are connected in parallel. The ratio of currents passing through them ... ` C. `4:3:2` D. `6:4:3`

The number of horizontal cross wires in a stadia diaphragm is (A) One (B) Two (C) Three (D) Four

Description : The number of horizontal cross wires in a stadia diaphragm is (A) One (B) Two (C) Three (D) Four

Last Answer : (C) Three

Francis and George started a business with investments of Rs.7000 and Rs.10000. After x months, Francis left. After two more months David joined the business with an investment of Rs.10000. If the annual profit is shared among David, Francis and George in the ratio 10:7:24, find the respective time periods of David, Francis and George for which they stayed that year. a)5:5:12 b)1:1:3 c)1:1:4 d)1:1:2

Description : Francis and George started a business with investments of Rs.7000 and Rs.10000. After x months, Francis left. After two more months David joined the business with an investment of Rs.10000. If the annual profit is shared among David, ... which they stayed that year. a)5:5:12 b)1:1:3 c)1:1:4 d)1:1:2

Last Answer : a)5:5:12