Question 1
1 markA household electric oven is rated at \(240\text{ V}, 3000\text{ W}\). Which of the following fuse ratings is most suitable for this appliance?
GCE O-Level · Science (Physics, Chemistry) (5086)
Practical Electricity: Practice Questions
5 multiple-choice questions marked as you go, and 1 written questions with worked solutions. All on Practical Electricity.
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Question 2
1 markWhy is a fuse connected to the live wire in a domestic electrical appliance?
Question 3
1 markThe cost of electricity is \(\$0.20\) per \(\text{kW h}\). How much does it cost to operate a \(2\text{ kW}\) air conditioner for \(8\) hours?
Question 4
1 markAn electrical appliance with a constant power rating is used for \(30\text{ minutes}\) and consumes exactly \(1.5\text{ kWh}\) of electrical energy. What is the power rating of this appliance?
Question 5
1 markWhich component in a mains circuit should always be connected to the live wire to ensure safety when the appliance is switched off or if a fault occurs?
Question 6
2 marksAn electric kettle is rated at \( 2.4 \text{ kW} \). Calculate the energy consumed, in \( \text{kWh} \), if it is used for \( 15 \text{ minutes} \).
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