A 1.5 V cell is connected across a `3Omega` resistance. Find the number of electrons coming out of the negative terminal of the cell In 5 minutes.

200J of heat is produced each second in a 5Omega resistance. Find the potential difference across the resistor.

A cell of emf 4V and internal resistance 0.5 is connected across a load resistance (i) 7.52, (ii) 11.50, calculate (i) the ratio of difference in emf of the cell and the potential drop across the load.(ii) the ratio of current in the two cases.

When a 12V battery is connected across an unknown resistor, there is a current of 2.5 mA in the circuit. Find the value of the resistance of the resistor.

In a potentiometer experiment, it is found that no current passes through the galvanometer, when the terminals of a cell are connected across 50 cm of the potentiometer wire. If the cell is shunted by a resistance of 5 ohm, the balance point is found at 40 cm of the wire from the same end. Find the internal resistance of the cell.

Two 6 ohm resistances are connected in parallel and a 12 V battery is connected across the combination. Find the current flowing through each of the resistances.

The unit cell of silver crystal is face central cubic. If the density of silver is 10.5 gcm^-3 , find the edge length of the unit cell in pm.

The potential difference between the terminals of a cell in open circuit is 2.2V. When it is connected through a resistance of 5 ohm , the P.D. falls to 1.8V. Find the internal resistance of the cell.