Question

In the electric circuit shown in figure, the reading of voltmeter $V_1$ is 26 volt, and the reading of ammeter $A_1$ is 2 ampere. The value of resistance $x$ is - (all instruments are ideal)

• A. $2\Omega$
• B. $4\Omega$
• C. $6\Omega$
• D. $8\Omega$

Answer 1

The correct option is B $4\Omega$

Given,
$V_1=26\text{Volt}$
$A_1=2$ ampere
$R$ (Total resistance ) $=(6+3+x)=(9+x)\Omega$
$I=\frac{V}{R}=\frac{26}{(9+x)}=2$
$13=9+x$
$x=4\Omega$