Resistance of a wire is $10 \Omega$. As shown in the figure, the wire is bent in the shape of a circular loop. Calculate the net resistance between the points $\mathrm{A}$ and $\mathrm{B}$ of this loop.

The figure shows a circuit diagram of four resistors. What is the current drawn from $6 \mathrm{V}$ battery? Calculate potential difference $V_B-V_D$.

Calculate amount of current drawn from the battery. How much is p.d. across $6 \mathrm{\Omega }$ resistor?

Calculate the current drawn from $2 \mathrm{V}$ battery in the diagram given below. Calculate $V_B-V_A$.