Multiple choice questions VI — task. Science CBSE, Class 10.

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1. A material

$B$ has twice the specific resistance of

$A$ . A circular wore 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

$\frac{l_B}{ l_A}$ of their respective lengths must be:

2. When a piece of wire of resistance

$R$ is joined end to end with an identical wire, the resistance of the new wire is

$R_1$ , say; when these wires are joined in parallel the new resistance is

$R_2$ . Then

$\frac{R_1}{R_2}\ =$

Did you find an error?

6. Multiple choice questions VI