Integrated Science

1A 100 W bulb used for 10 hours uses

2A 2 kW iron is used for 30 minutes. How much energy does it use?

3Three resistors of 2 Ω, 3 Ω and 6 Ω are connected in parallel across 6 V. The total current is

4What is the resistance of a lamp that carries 0.5 A at 6 V?

5Three 12 Ω bulbs are connected in parallel to a 6 V supply. The total current is

6Voltage is measured with a voltmeter connected

7If the cost is GH¢1.20 per kWh, the daily cost of using 8 kWh is

8A current of 2 A flows through a 6 Ω resistor. What is the voltage across it?

9A household uses a 2 kW heater for 3 h and five 100 W bulbs for 4 h daily. Daily energy is

10A kilowatt-hour is a unit of