A cell of emf $1.8$ volts gives a current of $17 \mathrm{A}$ when directly connected to an ammeter of resistance $0.06 \mathrm{\Omega }$. Internal resistance of the cell is

A dc source with internal resistance $R_0$ is connected to three identical resistors each of resistance $R$ as shown in the figure. If the thermal power generated in the circuit is highest, then

In the given circuit, the electric currents through $15 \mathrm{\Omega }$ and $6 \mathrm{\Omega }$ respectively are

In the given circuit, the current through $2 \mathrm{\Omega }$ resistor is

Five current carrying conductors meet at a point $\mathrm{P}$. What is the magnitude and direction of the current in the fifth conductor?