Question 278: Current Electricity

Question

A wire of resistance R is bent to form a square
ABCD as shown in the figure. The effective
resistance between E and C is :
(E is mid-point of arm CD)

Accepted Answer

$${1 \over {{R_{eq}}}} = {8 \over {7R}} + {8 \over R}$$
$${1 \over {{R_{eq}}}} = {{8 + 56} \over {7R}};{R_{eq}} = {{7R} \over {64}}$$

Answer

$${7 \over {64}}R$$

Answer

$${1 \over {16}}R$$

Answer

R

Answer

$${3 \over {4}}R$$

Current Electricity