Lamps used for household lighting are connected in

Find the equivalent resistance between $P$ and $Q$. (If each wire has a resistance $R$)

For the mixed connection shown in the figure,derive the equation for the equivalent resistance.

$A$ current of $15\,mA$ flows in the circuit as shown in the figure. The value of the potential difference between the points $A$ and $B$ will be $...\,V$.

The equivalent resistance between $A$ and $B$ is

In the given figure,$R_1=10 \Omega, R_2=8 \Omega, R_3=4 \Omega$ and $R_4=8 \Omega$. The battery is ideal with an emf of $12 \text{ V}$. Find the equivalent resistance of the circuit and the current supplied by the battery.