The diagram shows two resistors with a current of 2.0A flowing in the wire.

State the potential between B and C.

The filament of a lamp rated $120W$ as $220V$At has a resistivity $2.0\times {10}^{-6} \Omega m$.

What is the resistance of the lamp when it is connected to a source of  $220V$ (in $\Omega$)?

Determine the total resistance of the given circuit. (in $\Omega$).

What is the total resistance of the given circuit? (in $\Omega$)

Determine the total resistance for the given circuit. (in $\Omega$)

In the potentiometer in the diagram, wire AB is uniform and has a length of 1.00m. When contact is made at C with BC=54.0cm, the galvanometer G shows zero current. Determine the emf of the second cell.

Calculate the current in each resistor in the circuit shown in the diagram.

In the circuit in the diagram, the ammeter reads 7.0A. Determine the unknown emf $\epsilon$.