Student Login

Home›Chapters›Current Electricity PYQs›Ohm's Law, Resistivity & Temperature›Question 57

NEET 2013 · Ohm's Law, Resistivity & Temperature

Ohm's Law, Resistivity & Temperature question from NEET 2013

Q57NEET 2013Easy

Ohm's Law, Resistivity & Temperature

A wire of resistance 4 $\Omega$ is stretched to twice its original length. The resistance of stretched wire would be

Show answer and solution

Answer: (b)

On stretching at constant volume, $R \propto l^2$ .
$R' = 4 \times 2^2 = 16\ \Omega$
So the answer is (b) $16\ \Omega$ .

Report a mistake

More questions on Ohm's Law, Resistivity & Temperature

Two rods are joined end to end, as shown. Both have a cross-sectional area of 0.01 cm2…NEET 2013
If a wire is stretched to make it 0.1% longer, its resistance will:JEE Main 2011 (AIEEE)
Two conductors have the same resistance at 0 but their temperature coefficients of…JEE Main 2010 (AIEEE)
Statement - 1: The temperature dependence of resistance is usually given as R = R₀(1 + αΔ…JEE Main 2009 (AIEEE)
A wire of a certain material is stretched slowly by ten percent. Its new resistance and…NEET 2008 (AIPMT)
Consider a block of conducting material of resistivity 'ρ' shown in the figure. Current…JEE Main 2008 (AIEEE)
Consider a block of conducting material of resistivity 'ρ' shown in the figure. Current…JEE Main 2008 (AIEEE)
The resistance of a wire is 5 ohm at 50 and 6 ohm at 100. The resistance of the wire at 0…JEE Main 2007 (AIEEE)