1. Draw circuit symbols for:
Switch,wire,battery,voltmeter,ammeter,ohmmeter,resistor,variable resistor,bulb,fuse,motor,LED.

2. State an equation that links voltage, current and resistance.

3. Calculate the missing values in the table below.

4. A circuit is constructed using a power supply with a variable voltage output. It is connected to a fixed value of resistance. What will happen to the current in the circuit as the voltage is increased?

5. An electric kettle is connected to mains electricity at 230 V. A current of 5A flows to the kettle when it is switched on. Calculate the resistance of the kettle element.

6. A 36  resistor is connected to a 1•5 V supply. Calculate the current passing through the resistor.

7. An electric iron has a resistance of 76 . Calculate the voltage across it when the current to the iron is 3•0 A.