A conductor of diameter d, length 1 consumes a power of W when a current I flows through it. What will be...

A conductor of diameter d, length 1 consumes a power of W when a current I flows through it. What will be the power consumed if d is doubled, 1 is halved and current is tripled ?
by

1 Answer

Answer :

A conductor of diameter d, length 1 consumes a power of W when a current I flows through it. What will be the power consumed if d is doubled, 1 is halved and current is tripled ? 

72 W

by

Related questions

A tube mill as compared to a ball mill (A) Employs smaller balls (B) Gives finer size reduction but consumes more power (C) Has larger length/diameter ratio (>2 as compared to 1 for ball mill) (D) All (A), (B) and (C)

Description : A tube mill as compared to a ball mill (A) Employs smaller balls (B) Gives finer size reduction but consumes more power (C) Has larger length/diameter ratio (>2 as compared to 1 for ball mill) (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)

A single-phase ac voltage source has 200 V rms and a system connected consumes an active power of 300 W....

Description : A single-phase ac voltage source has 200 V rms and a system connected consumes an active power of 300 W. What is the reactive power consumed by the system if 2.5 A rms current is drawn ?  (a) 100 VAR (b) 200 VAR (c) 300 VAR (d) 400 VAR

Last Answer : A single-phase ac voltage source has 200 V rms and a system connected consumes an active power of 300 W. What is the reactive power consumed by the system if 2.5 A rms current is drawn ? 400 VAR

A current of 5.8 A flows through a 0.25 m long straight conductor which is kept perpendicular in a region of uniform magnetic field of 3.7 T . The force on conductor is a) 5.4 N b) 2.4 N c) 3.4 N d) 6.4 N

Description : A current of 5.8 A flows through a 0.25 m long straight conductor which is kept perpendicular in a region of uniform magnetic field of 3.7 T . The force on conductor is a) 5.4 N b) 2.4 N c) 3.4 N d) 6.4 N

Last Answer : a) 5.4 N

If 1 ampere current flows through 2m long conductor the charge flow through it in 1 hour will be a. 3600C b. 7200C c. 1C d. 2C

Description : If 1 ampere current flows through 2m long conductor the charge flow through it in 1 hour will be a. 3600C b. 7200C c. 1C d. 2C

Last Answer : a. 3600C

Owing to skin effect (a) current flows through the half cross-section of the conductor (b) portion of the conductor near the surface carries more current and core of the conductor carries less current (c) portion of the conductor near the surface carries less current and core of the conductor carries more cur¬rent (d) any of the above (e) none of the above

Description : Owing to skin effect (a) current flows through the half cross-section of the conductor (b) portion of the conductor near the surface carries more current and core of the conductor carries less current (c) ... core of the conductor carries more cur¬rent (d) any of the above (e) none of the above

Last Answer : (b) portion of the conductor near the surface carries more current and core of the conductor carries less current

A certain appliance consumes 350 W. When it is allowed to run continuously for 24 days, it consumes ...

Description : A certain appliance consumes 350 W. When it is allowed to run continuously for 24 days, it consumes electrical energy equal to: A. 20.16 kWh B. 201.6 kWh C. 2.01 kWh D. 8.4 kWh

Last Answer : A certain appliance consumes 350 W. When it is allowed to run continuously for 24 days, it consumes electrical energy equal to: 201.6 kWh

A current `i` ampere flows along the inner conductor of a coaxial cable and returns along the outer conductor fo the cable, then the magnetic inductio

Description : A current `i` ampere flows along the inner conductor of a coaxial cable and returns along the outer conductor fo the cable, then the magnetic inductio

Last Answer : A current `i` ampere flows along the inner conductor of a coaxial cable and returns along the outer conductor fo the ... D. `(mu_(0))/(2pi)(2pii)/(r)`

A current flows in a conductor from east to west. The direction of the magnetic field at a points above the conductor is

Description : A current flows in a conductor from east to west. The direction of the magnetic field at a points above the conductor is

Last Answer : A current flows in a conductor from east to west. The direction of the magnetic field at a points ... . towards south C. towards east D. towards west

A current of `2 A` flows in a system of conductor as shown. The potential difference `(V_(A) - V_(B))`

Description : A current of `2 A` flows in a system of conductor as shown. The potential difference `(V_(A) - V_(B))`

Last Answer : A current of `2 A` flows in a system of conductor as shown. The potential difference `(V_(A) - V_(B))` A. `-1V` B. `+1V` C. `-2V` D. `+2V`

A current of `2 A` flows in a system of conductor as shown. The potential difference `(V_(A) - V_(B))`

Description : A current of `2 A` flows in a system of conductor as shown. The potential difference `(V_(A) - V_(B))`

Last Answer : A current of `2 A` flows in a system of conductor as shown. The potential difference `(V_(A) - V_(B))` A. `+1V` B. `-1V` C. `+2V` D. `-2V`

Two infinitely long parallel conductors in vacuum any separated 1 metre between centers >then a current of 1 ampere flows the. uk each conductor, produce on each other a force of (a) 2 x 1(T2 N/m) (b) 2 x KT3 N/m (c) 2 x 10"5 N/m (d) 2x 1(T7 N/m)

Description : Two infinitely long parallel conductors in vacuum any separated 1 metre between centers >then a current of 1 ampere flows the. uk each conductor, produce on each other a force of (a) 2 x 1(T2 N/m) (b) 2 x KT3 N/m (c) 2 x 10"5 N/m (d) 2x 1(T7 N/m)

Last Answer : (d) 2x 1(T7 N/m)

An electric heater consumes 1000 Joules of energy in 5 seconds. Its power rating is: a) 200 W b) 1000 W c) 5000W d) none of the above

Description : An electric heater consumes 1000 Joules of energy in 5 seconds. Its power rating is: a) 200 W b) 1000 W c) 5000W d) none of the above

Last Answer : a) 200 W

The magnetic field at a point on the axis of a long solenoid having 5 turns per cm length when a current of 0.8 A flows through it is

Description : The magnetic field at a point on the axis of a long solenoid having 5 turns per cm length when a current of 0.8 A flows through it is

Last Answer : The magnetic field at a point on the axis of a long solenoid having 5 turns per cm length when a current of 0.8 A ... )` D. `8.024xx10^(-8) Wb//m^(2)`

Assertion : If a current flows through a wire of non-uniform cross-section, potential difference per unit length of wire is same throughout the length

Description : Assertion : If a current flows through a wire of non-uniform cross-section, potential difference per unit length of wire is same throughout the length

Last Answer : Assertion : If a current flows through a wire of non-uniform cross-section, potential difference per ... . If Assertion is false but Reason is true.

A 10 ohm and a 20 ohm resistor are connected in parallel to a current source. What fraction of the current flows through the 20 ohm resistor? w) 1/2 x) 1/3 y) 2/3 z) 3/4

Description : A 10 ohm and a 20 ohm resistor are connected in parallel to a current source. What fraction of the current flows through the 20 ohm resistor? w) 1/2 x) 1/3 y) 2/3 z) 3/4

Last Answer : ANSWER: X -- 1/3

The diameter of conductor used in LT 660 V grade power cables depends on

Description : The diameter of conductor used in LT 660 V grade power cables depends on

Last Answer : The diameter of conductor used in LT 660 V grade power cables depends on current to be carried

Three resistors of 4 Ω, 6 Ω and 9 Ω are connected in parallel. Which resistor consumes the maximum power?

Description : Three resistors of 4 Ω, 6 Ω and 9 Ω are connected in parallel. Which resistor consumes the maximum power?  (A) 4 Ω (B) 6 Ω (C) 9 Ω (D) 17 Ω

Last Answer : (c) 9 ohm

ECE Board Exam March 1996 The characteristics impedance of a transmission line does not depend upon its ________. A. conductor spacing B. conductor diameter C. length D. conductor radius

Description : ECE Board Exam March 1996 The characteristics impedance of a transmission line does not depend upon its ________. A. conductor spacing B. conductor diameter C. length D. conductor radius

Last Answer : C. length

A two-stage rocket attains a velocity of 3,000 meters per second when it drops the first stage and ignites the second. It consumes 1 kilogram of fuel per second and its exhaust speed is 2,000 meters per second. What is the thrust on the spacecraft? w) 2,000 Newtons x) 3,000 Newtons y) 2,000 Newton-seconds z) 3,000 Newton-seconds

Description : A two-stage rocket attains a velocity of 3,000 meters per second when it drops the first stage and ignites the second. It consumes 1 kilogram of fuel per second and its exhaust speed is 2,000 meters per second. ... ? w) 2,000 Newtons x) 3,000 Newtons y) 2,000 Newton-seconds z) 3,000 Newton-seconds 

Last Answer : ANSWER: W -- 2,000 NEWTONS

What happens when a current flows through a wire?

Description : What happens when a current flows through a wire?

Last Answer : Current can produce two effect one is heating effect and second is magnetic effect.

Find the force on a conductor of length 12m and magnetic flux density 20 units when a current of 0.5A is flowing through it. a) 60 b) 120 c) 180 d) 200

Description : Find the force on a conductor of length 12m and magnetic flux density 20 units when a current of 0.5A is flowing through it. a) 60 b) 120 c) 180 d) 200

Last Answer : b) 120

A conductor of length L has current I passing through it, when it is placed parallel to a magnetic field. The force experienced by the conductor will be (a) zero (b) BLI (c) B2LI (d) BLI2

Description : A conductor of length L has current I passing through it, when it is placed parallel to a magnetic field. The force experienced by the conductor will be (a) zero (b) BLI (c) B2LI (d) BLI2

Last Answer : (a) zero

A conductor of length L has current I passing through it, when it is placed...

Description : A conductor of length L has current I passing through it, when it is placed parallel to a magnetic field. The force experienced by the conductor will be

Last Answer : A conductor of length L has current I passing through it, when it is placed parallel to a magnetic field. The force experienced by the conductor will be zero.

The leakage current that flows through a photodiode with no light input ∙ A. dark voltage ∙ B. dark impedance ∙ C. dark power ∙ D. dark current

Description : The leakage current that flows through a photodiode with no light input ∙ A. dark voltage ∙ B. dark impedance ∙ C. dark power ∙ D. dark current

Last Answer : D. dark current

In a coaxial transmission line, the useful power flows through

Description : In a coaxial transmission line, the useful power flows through

Last Answer : In a coaxial transmission line, the useful power flows through the interface of the two conductors

An element which consumes energy instead of storing in it is

Description : An element which consumes energy instead of storing in it is  a. Resistor b. Inductor c. Capacitor d. Conductor

Last Answer : An element which consumes energy instead of storing in it is Resistor 

The Cromwell Current is a subsurface current that flows how? Does it flow: w) west in the Atlantic Ocean x) east in the Atlantic Ocean y) east in the Pacific Ocean z) west in the Pacific Ocean

Description : The Cromwell Current is a subsurface current that flows how? Does it flow: w) west in the Atlantic Ocean x) east in the Atlantic Ocean y) east in the Pacific Ocean z) west in the Pacific Ocean

Last Answer : ANSWER: Y -- EAST IN THE PACIFIC OCEAN

he pressure drop per unit length of pipe incurred by a fluid 'X' flowing through pipe is Δp. If another fluid 'Y' having both the specific gravity & density just double of that of fluid 'X', flows through the same pipe at the same flow rate/average velocity, then the pressure drop in this case will be (A) Δp (B) 2Δp (C) Δp 2 (D) Δp/2

Description : he pressure drop per unit length of pipe incurred by a fluid 'X' flowing through pipe is Δp. If another fluid 'Y' having both the specific gravity & density just double of that of fluid 'X', flows through the same pipe ... then the pressure drop in this case will be (A) Δp (B) 2Δp (C) Δp 2 (D) Δp/2

Last Answer : (B) 2Δp

A yazoo stream flows through which of the following? w) gorge x) divide y) backswamp z) water gap

Description : A yazoo stream flows through which of the following? w) gorge x) divide y) backswamp z) water gap

Last Answer : ANSWER: Y -- BACKSWAMP

Water flows through a horizontal pipe at a constant volumetric rate. At a location where the cross sectional area decreases, the velocity of the fluid: w) increases x) decreases y) stays the same

Description : Water flows through a horizontal pipe at a constant volumetric rate. At a location where the cross sectional area decreases, the velocity of the fluid: w) increases x) decreases y) stays the same

Last Answer : ANSWER: W -- INCREASES 

What type of TV consumes the least power?

Description : What type of TV consumes the least power?

Last Answer : It doesn't depend so much on the TV as it depends on the size, settings and type of TV. You want to minimize these things if you are searching for a TV that will help save power.

A engine will generate maximum torque when it a. runs at maximum speed b. develops maximum power c. runs at lowest speed d. consumes more fuel

Description : A engine will generate maximum torque when it a. runs at maximum speed b. develops maximum power c. runs at lowest speed d. consumes more fuel

Last Answer : ANSWER c. runs at lowest speed

Choke crushing (in case of a Jaw crusher) compared to free crushing (A) Results in increased capacity (B) Consumes less power (C) Consumes more power (D) Both (A) and (C)

Description : Choke crushing (in case of a Jaw crusher) compared to free crushing (A) Results in increased capacity (B) Consumes less power (C) Consumes more power (D) Both (A) and (C)

Last Answer : (C) Consumes more power

Mercury electrolytic cells are preferred over diaphragm electrolytic cell (for production of caustic soda), as it (A) Has larger production capacity per unit cell (B) Consumes less power per ton of Cl2 produced (C) Produces high purity (70%) caustic soda directly (D) All (A), (B) and (C)

Description : Mercury electrolytic cells are preferred over diaphragm electrolytic cell (for production of caustic soda), as it (A) Has larger production capacity per unit cell (B) Consumes less power per ton of Cl2 produced (C) Produces high purity (70%) caustic soda directly (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)

Point out the wrong statement. a) TCO must account for the real costs of items, but frequently they do not b) A system consumes resources such as space in a datacenter or portion of your site, power, cooling, and management c) Microsoft maintains an economics page for its Windows Azure Platform d) None of the mentioned

Description : Point out the wrong statement. a) TCO must account for the real costs of items, but frequently they do not b) A system consumes resources such as space in a datacenter or portion of ... management c) Microsoft maintains an economics page for its Windows Azure Platform d) None of the mentioned

Last Answer : None of the mentioned

Point out the wrong statement. a) Internet consumes roughly 1 percent of the world’s total power b) The cost advantages of cloud computing have enabled new software vendors to create productivity applications c) A client can provision computer resources without the need for interaction with cloud service provider personnel d) None of the mentioned

Description : Point out the wrong statement. a) Internet consumes roughly 1 percent of the world's total power b) The cost advantages of cloud computing have enabled new software vendors to create ... resources without the need for interaction with cloud service provider personnel d) None of the mentioned

Last Answer : Internet consumes roughly 1 percent of the world’s total power

In a nuclear power reactor, fission produces heat which is used to produce electricity. A reactor producing more fissionable material than it consumes is known as what kind of reactor?

Description : In a nuclear power reactor, fission produces heat which is used to produce electricity. A reactor producing more fissionable material than it consumes is known as what kind of reactor? 

Last Answer : ANSWER: BREEDER REACTOR 

For pipe flows, head is proportional to __________ at constant capacity(where, D = pipe diameter). (A) 1/D(B) 1/D2(C) 1/D5(D) D

Description : For pipe flows, head is proportional to __________ at constant capacity(where, D = pipe diameter). (A) 1/D (B) 1/D2 (C) 1/D5 (D) D

Last Answer : (C) 1/D5

If 120 Coulomb of charge passes through a conductor in 60 sec, the current in the conductor is

Description : If 120 Coulomb of charge passes through a conductor in 60 sec, the current in the conductor is

Last Answer : If 120 Coulomb of charge passes through a conductor in 60 sec, the current in the conductor is 2 A

why current flows in opposite direction of electrons ?

Description : why current flows in opposite direction of electrons?

Last Answer : Hi team, the current flow is nothing but flow of electrons But the conventional direction I'd opposite to actual current flow . ..

The amount of mechanical force or torque produced by an electric motor depends on the ________________. A. strength of its magnetic field B. amount of armature current flow C. length of conductor in the field D. all of the above

Description : The amount of mechanical force or torque produced by an electric motor depends on the ________________. A. strength of its magnetic field B. amount of armature current flow C. length of conductor in the field D. all of the above

Last Answer : Answer: D

Find the Lorentz force due to a conductor of length 2m carrying a current of 1.5A and magnetic flux density of 12 units. a) 24 b) 36 c) 32 d) 45

Description : Find the Lorentz force due to a conductor of length 2m carrying a current of 1.5A and magnetic flux density of 12 units. a) 24 b) 36 c) 32 d) 45

Last Answer : c) 32

Find the maximum force of the conductor having length 60cm, current 2.75A and flux density of 9 units. a) 14.85 b) 18.54 c) 84.25 d) 7.256

Description : Find the maximum force of the conductor having length 60cm, current 2.75A and flux density of 9 units. a) 14.85 b) 18.54 c) 84.25 d) 7.256

Last Answer : a) 14.85

Find the flux density due to a conductor of length 6m and carrying a current of 3A(in 10 -7 order) a) 1 b) 10 c) 100 d) 0.1

Description : Find the flux density due to a conductor of length 6m and carrying a current of 3A(in 10 -7 order) a) 1 b) 10 c) 100 d) 0.1

Last Answer : a) 1

The force on a conductor of length 12cm having current 8A and flux density 3.75 units at an angle of 300 is a) 1.6 b) 2 c) 1.4 d) 1.8

Description : The force on a conductor of length 12cm having current 8A and flux density 3.75 units at an angle of 300 is a) 1.6 b) 2 c) 1.4 d) 1.8

Last Answer : d) 1.8

Find the magnetic flux density of a finite length conductor of radius 12cm and current 3A in air( in 10 -6 order) a) 4 b) 5 c) 6 d) 7

Description : Find the magnetic flux density of a finite length conductor of radius 12cm and current 3A in air( in 10 -6 order) a) 4 b) 5 c) 6 d) 7

Last Answer : b) 5

What is a solenoid? Draw the pattern of magnetic Field lines of a solenoid through which a steady current flows. What does the pattern of field lines‟? Inside the solenoid indicate? -Science

Description : What is a solenoid? Draw the pattern of magnetic Field lines of a solenoid through which a steady current flows. What does the pattern of field lines‟? Inside the solenoid indicate? -Science

Last Answer : Solenoid can be defined as a coil of many circular turn of insulated copper wire wrapped in cylindrical structure. Following diagram shows the pattern of magnetic Field lines of a solenoid through which a steady current flows:

The current through a wire depends on time as `I=I_(0)+alpha t`, where `I_(0)=10` A and `alpha=4 As^(-1)`. Find the charge that flows across a section

Description : The current through a wire depends on time as `I=I_(0)+alpha t`, where `I_(0)=10` A and `alpha=4 As^(-1)`. Find the charge that flows across a section

Last Answer : The current through a wire depends on time as `I=I_(0)+alpha t`, where `I_(0)=10` A and ... that flows across a section of the wire in 10 seconds.

A current l flows through a closed loop as shown in figure .The magnetic field at the centre O is

Description : A current l flows through a closed loop as shown in figure .The magnetic field at the centre O is

Last Answer : A current l flows through a closed loop as shown in figure .The magnetic field at the centre O is A. ... )l)/(2piR)(theta+sintheta)` D. None of these

When a current of `(2.5 +- 0.5)` ampere flows through a wire, it develops a potential difference of `(20 +- 1)` volt, the resistance of the wire is

Description : When a current of `(2.5 +- 0.5)` ampere flows through a wire, it develops a potential difference of `(20 +- 1)` volt, the resistance of the wire is

Last Answer : When a current of `(2.5 +- 0.5)` ampere flows through a wire, it develops a potential difference of `(20 +- ... `(8 pm 1.5)Omega` D. `(8 pm 3)Omega`