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Question

In the following circuit, each resistor has a resistance of 15 $Ω$ and the battery has an e.m.f. of $12 V$ with negligible internal resistance
When a resistor of resistance R is connected between & F, no current flows through the galvanometer (not shown in the figure) connected between C & F. Calculate the value of R

$30 Ω$
$10 Ω$
$15 Ω$
$5 Ω$

A

5 Ω

B

15 Ω

C

10 Ω

D

30 Ω

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