An ideal battery is connected to two resistors and joined in series

PHYSICS · Multi-part · CBSE · Physics · Electricity · Electricity

Problem

An ideal battery is connected to two resistors

R_1

and

R_2

joined in series. The current through the circuit is measured for different values of the applied potential difference. The readings are:

V=2\,\text{V},\; I=0.04\,\text{A}

and

V=6\,\text{V},\; I=0.12\,\text{A}

. (i) Use these two readings to obtain the equivalent resistance of the series combination. (ii) If one of the resistors has a value of

30\,\Omega

, calculate the resistance of the other resistor. (iii) For an applied potential difference of

9\,\text{V}

, find the current in the circuit.