What will be the change in resistance of a constantan wire when its radius is made half and length reduced to one-fourth of its original length ?

1 Answer

Answer :

What will be the change in resistance of a constantan wire when its radius is made half and length reduced to one-fourth of its original length ?

Related questions

Description : If a copper wire is increased to double its length, its resistance will become – (1) four times (2) one-fourth (3) double (4) half

Last Answer : (3) double Explanation: There is a direct relationship between the amount of resistance encountered by charge and the length of wire it must traverse. After all, if resistance occurs as the result of collisions ... the atoms of the wire, then there is likely to be more collisions in a longer wire.

Description : If a copper wire is increased to double its length, its resistance will become (1) four times (2) one–fourth (3) double (4) half

Last Answer : double

Description : Mitosis is a type of cell division in which - (1) The chromosomes maintain their original number (2) The chromosome number is reduced to half (3) The Chromosome number is doubled (4) The chromosome number is reduced to one fourth

Last Answer : (3) The Chromosome number is doubled

Description : A journal bearing with hydrodynamic lubrication is running steadily with a certain amount of minimum film thickness. When the load and speed are doubled, how does the minimum film thickness vary? [IES-2008 ... Gets reduced to one-fourth of original value (d) Gets reduced to half of original value

Last Answer : (a) Remains unchanged

Description : A wire is being used as a replacement having twice the length and one-half the cross-sectional area of the original wire. The resistance of this new wire, when compared to that of the original wire, ... B. twice as much C. the same as the original resistance D. one-half of the original resistance

Last Answer : Answer: A

Description : A replacement wire having twice the length and one-half the cross-sectional area of the original wire will have a resistance that is _____________. A. four times that of the original wire B. twice that of ... wire C. the same as that of the original wire D. one-half that of the original wire

Last Answer : Answer: A

Description : In hot wire anemometer used for gas flow measurement, the wire is normally made of (A) Copper (B) Platinum (C) Constantan (D) Chromium

Last Answer : (B) Platinum

Description : The length of a wire is increased by 1 mm on the application of a certain load. In a wire of the same material but of twice the length and half the radius, the same force will produce an elongation of (a) 0.5 mm (b) 2 mm (c) 4 mm (d) 8 mm

Last Answer : (d) 8 mm

Description : A metal wire of specific resistance `64xx10^(-6) Omega` m and length 1.98 cm has a resistance of `7 Omega`. Find its radius.

Last Answer : A metal wire of specific resistance `64xx10^(-6) Omega` m and length 1.98 cm has a resistance of `7 Omega`. Find its radius.

Description : Specific resistance of a wire a. will depend on its length b. will depend on its radius c. will depend on the type of material of the wire d. will depend on none of the above

Last Answer : c. will depend on the type of material of the wire

Description : A wire of resistance `48 Omega` is uniformly stretched until its new length becomes 4 times the original length. Find its new resistance.

Last Answer : A wire of resistance `48 Omega` is uniformly stretched until its new length becomes 4 times the original length. Find its new resistance.

Description : A wire of resistance `10 Omega` is drawn out so that its length is thrice its original length. Calculate its new resistance (resistivity and density o

Last Answer : A wire of resistance `10 Omega` is drawn out so that its length is thrice its original ... (resistivity and density of the material remain uncharged).

Description : A wire of resistance `4 Omega` is stretched to twice its original length. The resistance of stretched wire would be

Last Answer : A wire of resistance `4 Omega` is stretched to twice its original length. The resistance of stretched wire would ... Omega` C. `8 Omega` D. `16 Omega`

Description : A wire of resistance `4 Omega` is stretched to twice its original length. In the process of stretching, its area of cross-section gets halved. Now, th

Last Answer : A wire of resistance `4 Omega` is stretched to twice its original length. In the process of stretching, its area ... Omega` C. `1 Omega` D. `4 Omega`

Description : If a wire of resistance R is melted and recast to half of its length, then the new resistance of the wire will be - (1) R/4 (2) R/2 (3) R (4) 2R

Last Answer : (1) R/4

Description : If a wire of resistance R is melted and recast to half of its length, then the new resistance of the wire will be

Last Answer : R/4

Description : A compression spring is made of music wire of 2 mm diameter having a shear strength and shear modulus of 800 Mpa and 80 Gpa respectively. The mean coil diameter is 20mm, free length is 40 mm, and the number ... by 8 times b. decreased by 2 times c. increased by 2 times d. decreased by 8 times

Last Answer : a. increased by 8 times

Description : `""^(226)Ra` disintegrates at such a rate that after 3160 years, only one fourth of its original amount remains . The half life of `""^(226)Ra` will b

Last Answer : `""^(226)Ra` disintegrates at such a rate that after 3160 years, only one fourth of its original amount ... B. 3160 years C. 1580 years D. 6230 years

Description : Weight of a person at a height of 2R from the centre of the earth, where R is the radius of the earth- (1) remains same (2) becomes half (3) becomes twice (4) becomes one-fourth

Last Answer : (4) becomes one-fourth Explanation: The gravitational force is proportional to 1/R2, where R is the distance from the centre of the Earth. So at a height of 2R from the centre of the earth, the corresponding weight would be one-fourth of the original weight.

Description : The effective width of a column strip of a flat slab, is (A) One-fourth the width of the panel (B) Half the width of the panel (C) Radius of the column (D) Diameter of the column

Last Answer : Answer: Option B

Description : When a helical spring is cut into two halves, the stiffness of each half spring will be, (A) Same as original spring (B) Double of original spring (C) Half of original spring (D) One fourth of original spring

Last Answer : (B) Double of original spring

Description : A particle is moving in Simple Harmonic Motion in a simple pendulum with some period of oscillation. Now in order to double the period of oscillation a.The length of pendulum should be quadrupled b.The ... length of pendulum should be reduced to one fourth e.The mass of the bob should be doubled

Last Answer : a. The length of pendulum should be quadrupled

Description : If the half-life of a radioisotope is 2 days, after how many days is the quantity reduced to 12.5% of its original amount? w) 4 days x) 6 days y) 8 days z) 10 days

Last Answer : ANSWER: X -- 6 DAYS

Description : The given figure is the diagrammatic representation of the E. coli vector pBR322. Which one of the given options correctly identifies its certain component(s)? Bam H1 Sal 1 Pvu II rop ... reduced osmotic pressure (c) HindIII, EcoRI - selectable markers (d) ampR, tetR-antibiotic resistance genes

Last Answer : (d) ampR, tetR–antibiotic resistance genes

Description : If the length of a heater coil is reduced by 10% of its original length, then Power consumed by heater will? A. Increase over 10% B. Decrease by 10% (Answer) C. Decrease by 0.5% D. Increase by 0.5%

Last Answer : B. Decrease by 10% (Answer)

Description : The heating elements of electric irons are made of (A) Copper. (B) Nichrome. (C) Constantan. (D) Aluminium.

Last Answer : (B) Nichrome.

Description : A spherical ball is divided into two equal halves. If the curved surface area of each half is 56.57 cm?, find the volume of the spherical ball.11531/cylinder-radius-halved-and-height-doubled-then-find-volume-with-respect-original-volume -Maths 9th

Last Answer : since curved surface of half of the spherical ball = 56.57 cm2 ∴ 2πr2 = 56.57 ⇒ r2 = 56.57 / 2 × 3.14 = 9 ⇒ r = 3 cm Now, volume of spherical ball = 4 / 3 πr3 = 4 / 3 × 3.14 × 3 × 3 × 3 = 113.04 cm3

Description : A spherical ball is divided into two equal halves. If the curved surface area of each half is 56.57 cm?, find the volume of the spherical ball.11531/cylinder-radius-halved-and-height-doubled-then-find-volume-with-respect-original-volume -Maths 9th

Last Answer : since curved surface of half of the spherical ball = 56.57 cm2 ∴ 2πr2 = 56.57 ⇒ r2 = 56.57 / 2 × 3.14 = 9 ⇒ r = 3 cm Now, volume of spherical ball = 4 / 3 πr3 = 4 / 3 × 3.14 × 3 × 3 × 3 = 113.04 cm3

Description : If the length of a rice field is increased by 20% and the breadth is reduced by 20%, the area of the field will be 192 sq. m. What is the area of the original field? (a) 184 sq. m. (b) 196 sq. m. (c) 204 sq. m. (d) 225 sq. m. (e) None of these

Last Answer : (e) None of these

Description : A drawn wire of resistance 5 Ω is further drawn so that its diameter becomes one-fifth of the original. What is its resistance with volume remaining the same ? (a) 25 Ω (b) 125 Ω (c) 625 Ω (d) 3125 Ω

Last Answer : A drawn wire of resistance 5 Ω is further drawn so that its diameter becomes one-fifth of the original. What is its resistance with volume remaining the same ? (a) 25 Ω (b) 125 Ω (c) 625 Ω (d) 3125 Ω

Description : Calculate the resistance of a 2 m long nichrome wire of radius 0.321 mm. Resistivity of nichrome is `15xx10^(-6) Omega` m. If a potential difference o

Last Answer : Calculate the resistance of a 2 m long nichrome wire of radius 0.321 mm. Resistivity of nichrome is ` ... wire, what will be the current in the wire ?

Description : A wire of length a units is cut into two equal pieces and make a circle of radius r with one piece. Frame the formula by making r the subject.

Last Answer : A wire of length a units is cut into two equal pieces and make a circle of radius r with one piece. Frame the formula by making r the subject.

Description : A solenoid has length `0.4cm`, radius 1 cm and 400 turns of wire. If a current fo 5 A is passed through this solenoid, then what is the magnetic field

Last Answer : A solenoid has length `0.4cm`, radius 1 cm and 400 turns of wire. If a current fo 5 A is passed through this ... `6.28xx10^(-7)T` D. `6.28xx10^(-6)T`

Description : Change in length and cross-sectional area of metal wire changes A. current B. voltage C. resistance D. magnetic effect

Last Answer : resistance

Description : If the length of a cable is doubled, its capacitance (a) becomes one-fourth (b) becomes one-half (c) becomes double (d) remains unchanged

Last Answer : (c) becomes double

Description : The minimum length of a plane mirror in which a person can see himself full length should be (a) equal to the person’s height (b) slightly more than his height (c) nearly half his height (d) nearly one-fourth his height

Last Answer : Ans:(c)

Description : In long and short wall method of estimation, the length of long wall is the centre to centre distance between the walls and (A) Breadth of the wall (B) Half breadth of wall on each side (C) One fourth breadth of wall on each side (D) None of these

Last Answer : (B) Half breadth of wall on each side

Description : Pick up the correct statement regarding the centre line method of estimating a building (A) Product of the centre line of the walls and area of cross-section of any item, gives total quantity of the ... length is reduced by half the layer of main wall joining the partition wall (D) All the above

Last Answer : (D) All the above

Description : Full form of CFL used in place of electric bulbs is – (1) compact fluorescent lamp (2) constantan filament lamp (3) closed filament lamp (4) closed fluorescent lamp

Last Answer : (1) compact fluorescent lamp Explanation: A compact fluorescent lamp (CFL) is a fluorescent lamp designed to replace an incandescent lamp; some types fit into light fixtures formerly used for incandescent lamps.

Description : Which of the following thermocouples is incapable of measuring sub￾zero (i.e., < 0°C) temperature? (A) Chromel-alumel (B) Iron-constantan (C) Platinum-platinum + rhodium (D) Copper-constantan

Last Answer : (C) Platinum-platinum + rhodium

Description : Which of the following is not a copper based alloy with nickel? (A) German silver (B) Monel metal (C) Inconel (D) Constantan

Last Answer : (C) Inconel

Description : Which of the following is universally employed as the low expansion metal in the bimetallic thermometer, which is an iron-nickel alloy containing 36% nickel and has very low co-efficient of expansion (1/20th of ordinary metals) ? (A) Invar (B) Constantan (C) Chromel (D) Alumel

Last Answer : (A) Invar

Description : An alloy used as thermocouple material comprises of 40% nickel and60% copper. It is called (A) Constantan (B) Kanthal (C) Chromel (D) German silver

Last Answer : (A) Constantan

Description : Constantan is an alloy of (A) Cu (55%) & Sn (45%) (B) Cu (55%) & Ni (45%) (C) Pt (95%) & Rh (10%) (D) Fe (80%) & Ni (20%)

Last Answer : (B) Cu (55%) & Ni (45%)

Description : The material used in the filament of electric bulbs is (A) Nichrome (B) Tungsten (C) Constantan (D) German silver

Last Answer : (B) Tungsten

Description : Constantan used in thermocouples is an alloy of (A) Iron & copper (B) Copper & aluminium (C) Lead & tin (D) None of these

Last Answer : (D) None of these

Description : ________ is not used as a material of construction in thermocouples. (A) Alumel (B) Rhodium (C) Constantan (D) Duralumin

Last Answer : (D) Duralumin

Description : The following thermocouple may be used for measuring temperature upto 1873°K. (A) Chromel-alumel (B) Copper-constantan (C) Platinum-platinum rhodium (D) Iron-constantan

Last Answer : (C) Platinum-platinum rhodium

Description : Out of the following, the alloy which has equal percentage of constituents, is (A) White metal (B) Gun metal (C) Duralumin (D) Constantan

Last Answer : Option D

Description : Tick off the material, which is different from the group (A) Constantan. (B) Manganin. (C) Nichrome. (D) Brass.

Last Answer : (D) Brass.