The current $i$ through a conductor varies with time $t$ as shown in figure. The average electric current during $t=0$ to $t=10 \mathrm{s}$ will be

In the circuit shown, the current drawn by the cell is

In the situation shown each cell has e.m.f. $4 \mathrm{V}$ and internal resistance $1\mathrm{\Omega }$. The maximum power that can be delivered to the variable load resistance $R$ is

Two bulbs $A$ and $B$ are connected as shown. When switch$\text{'}S\text{'}$ is closed then which of them will fuse?

What is the value of resistance ' $R$ ' in circuit, so that the current through $4 \Omega$ resistance is zero?