Home
Class 12
PHYSICS
A metal wire of circular cross - sectio...

A metal wire of circular cross - section has a resistance `R_(1)`. The wire is now stretched without breaking so that is length is doubled and the density is assumed to remain the same. If the resistance of the wire now becomes `R_(2)` then `R_(2) : R_(1)` is

A

`1 : 1`

B

`1 : 2`

C

`4 : 1`

D

`1 : 4`

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • QUESTION PAPER 2015

    WB JEE PREVIOUS YEAR PAPER|Exercise PHYSICS (CATEGORY II)|4 Videos

  • QUESTION PAPER 2015

    WB JEE PREVIOUS YEAR PAPER|Exercise PHYSICS (CATEGORY III)|5 Videos

  • QUESTION PAPER 2014

    WB JEE PREVIOUS YEAR PAPER|Exercise PHYSICS (CATEGORY III)|3 Videos

  • QUESTION PAPER 2016

    WB JEE PREVIOUS YEAR PAPER|Exercise PHYSICS|40 Videos

Similar Questions

Explore conceptually related problems

A metallic wire of specific resistance s is stretched in such a way that its length is doubles and area of cross section is halved Then the specific resistance of the wire will be

A metallic wire has a definite resistance . IF the wire is stretched in such a way that its length becomes doubled then what will be the resistance of the wire? Consider the volume and the resistivity of the wire remains unchanged.

A uniform metal wire of resistance R is stretched to twice its length. Now this wire is halved, and the two halves are connected in parallel. The equivalent resistance is

A uniform metal wire of resistance R is stretched to twice its length. Now this wire is halved and the two part are connected in parallel. The equivalent resistance is-

If a wire is stretched to double its length, find the new resistance if the original resistance be R.

IF the length of a copper wire is increased by 0.1%, show that the resistance of the copper wire will increase by 0.2%.

A metal wire has a resistances of 5 Omega . If its length is doubled by stretching,what would be its resistance? Suppose the volume and resistivity of the wire do not change.

An wire of resistance R is elongated n-fold to make a new uniform wire. The resistance of new wire

Resistance of a wire of circular cross-section is 2 Omega . If both the length and radius of cross-section of the wire be halved, then what will be the resistance of the wire ?

A wire of resistivity rho is stretched uniformly so that its length becomes four times. What is its new resistivity? (Assume temperature of the wire remains constant during stretching of the wire).