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- 1. Multiple Choice
A toaster, rated 1500 W 240 V, is switched on for 15 minutes. Calculate the energy used.
3600 J
22 500 J
216 000 J
1 350 000 J
- 2. Multiple Choice
An air-con, rated 1.8 kW 240 V, is switched on for 10 minutes. Calculate the energy used.
1 080 000 J
144 000 J
2400 J
18 J
- 3. Multiple Choice
The electrical energy used by a fan for 4 minutes is 170 kJ. Calculate the power of this fan in W.
42.5
42500
708
0.708
- 4. Multiple Choice
A television rated 1.2 kW , 240 V is connected to a 240V electricity supply. Calculate curent that flows through the television.
5 A
2.5 A
0.005
1.0 A
- 5. Multiple Choice
An oven rated 750 W, 220 V is switched on for 45 minutes. Ho much electrical energy is used by the oven?
3.4 J
165000 J
33750 J
2025000 J
- 6. Multiple Choice
An oven rated 750 W, 220 V is switched on for 45 minutes. Calculate the cost of energy that is used by the oven if the cost per 1 unit is 30 sen?
3 sen
17 sen
16875 sen
4 sen
- 7. Multiple Choice
A 5kW electric cooker is used for 55 minutes to cook. Calculate the cost of electrical energy used if the rate per unit is 50 sen.
RM 0.23
RM 230
RM 2.30
RM275
- 8. Multiple Choice
An electric heater is rated 230V, 10 A. Calculate the power of the electric heater in kW.
2300
23
2.3
0.23
- 9. Multiple Choice
What is the unit of current?
ohm
ampere
volt
joule
- 10. Multiple ChoiceElectrical power can be calculated usingResistance x VoltageVoltage x CurrentVoltage ÷ Current
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