**Resistance
Homework : Foundation level
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1. In the space draw a circuit containing a battery, a voltmeter, an ammeter and a resistor. Show how the components should be arranged so that the resistance of the resistor can be measured.

2. Write down the resistance equation

3. If the voltage across a lamp is 8V and the current through the resistor is 2.4A, calculate the resistance of the lamp.

4. Cross out the wrong answers in the brackets.

a) The resistance of a metal wire (increases/decreases/stays the same) as the voltage increases.

b) The resistance of a lamp (increases/decreases/stays the same) as the voltage increases.

5. On the graph axes shown below say which component would produce each line on the graph.

a) Line A is a (lamp/resistor/diode)

b) Line B is a (lamp/resistor/diode)

c) Line C is a (lamp/resistor/diode)

6. Two resistors have resistances of 56W and 47W.

a) If they were connected in series the total resistance would be

A: 1.2W B : 51.5W C : 103W

b) If they were connected in parallel the total resistance would be

A : 25.5W B : 51.5W C : 103W