Three resistors of 6 Ω each are joined in parallel and the combination is connected across a 12 V battery of negligible internal resistance. Find the current drawn.

State the principle of a potentiometer and one advantage it has over a voltmeter.

State the principle of a Wheatstone bridge and the condition for balance.

A cell of emf 2 V and internal resistance 0.5 Ω is connected to a 3.5 Ω resistor. Find the current and the terminal potential difference.

What is drift velocity, and how is it related to the current in a conductor?

State Kirchhoff's two laws and say what conservation principle each expresses.

How does the resistivity of a metal and of a semiconductor change with temperature, and why?