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Current Electricity question

2004 · Shift 0 · Q140

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JEE Main
Physics
Current Electricity
2004 · Shift 0 · Q140

Current Electricity question

2004 · Shift 0 · Q140

JEE MainPhysicsCurrent ElectricityMCQ+4 / −1

A material

'B'

has twice the specific resistance of

'A'.

A circular wire made of

'B'

has twice the diameter of a wire made of

'A'

. Then for the two wires to have the same resistance, the ratio

{l \over B}/{l \over A}

of their respective lengths must be

A
$1$
B
${l \over 2}$
C
${l \over 4}$
D
$2$

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