Home
Class 12
PHYSICS
If the length of the metallic wire is do...

If the length of the metallic wire is doubled, then the resistance of the wire

A

reduces by half

B

doubles

C

reduces by `(1)/(4)`

D

quadruples

Text Solution

Verified by Experts

The correct Answer is:
B
`therefore` Resistance , ` R = rho (l)/(A)`
`because R prop I` (where , `rho` and A are constants ).
If l is doubled , then R will also be doubled .
Promotional Banner

Similar Questions

Explore conceptually related problems

If the length of the wire is doubled the strain produced is

If the length of a wire is doubled, then its Young's modulus

The resistance of a wire is R . If the length of the wire is doubled by stretching, then the new resistance will be

" The resistance of a wire is "20Omega" .It is stretched so that the length becomes double,then the new resistance of the wire will b "

If length of a metallic wire becomes n times, its resistance becomes

A uniform wire resistance 100(Omega) is melted and recast in a wire of length double that of the original . What would be the resistance of the wire?

A 4 Omega wire is doubled on it. Calculate the new resistance of the wire.

The resistivity of iron is 1 xx 10^(-7) ohm -m. The resistance of a iron wire of paritcular length and thickness is 1 ohm. If the length and the diameter of wire both are doubled, then the resistivity in ohm-m will be