The diagrams represent four copper wires. Which wire has the lowest resistance?

The component measure Potential difference (voltage)  in the unit of ____

An electrical heater has a resistance of 21.8 Ω when connected to a 240 V mains supply. Calculate the current in the heater.

The Figure shows a circuit containing a battery of electromotive force (e.m.f.) 12V and a heater of resistance 6.0 Ω. Calculate the current in the heater.

What is an electric field?

What is the reading on the Ammeter?

The diagrams represent four copper wires. Which wire has the greatest resistance?

Answer the question.

The component measure _______ in the unit of Volts

The Figure shows a circuit. The two lamps shown are identical. Each lamp has a potential difference (p.d.) of 3.0 V across it and a current of 2.0 A in it. PQ is a length of uniform metal wire. The resistance of PQ is R.

The component measure Current in the unit of ____

The diagram shows a reading on an ammeter. What is the reading?

The diagrams show three ammeters. Which ammeters show the same value of current?