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Important Questions

Electricity — Important Questions

ICSE · Class 8 · Physics

69 important questions from Electricity for ICSE Class 8 Physics, with answers. Includes multiple choice and true false questions.

69 questions40 flashcards10 formulas & key relations5 concepts

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69 Questions·
multiple choicetrue false

Important Questions from Electricity

1multiple choice
3 marks

A heater works at 220 V and draws 6.8 A. What is its power?

Show answer

1496 W

Use P = VI. So, P = 220 × 6.8 = 1496 W. This is about 1.5 kW.

2multiple choice
3 marks

A 100 W bulb works at 220 V. What is the safe current through it?

Show answer

0.45 A

Use I = Power / Voltage. So, I = 100 / 220 = 0.4545... A, which is about 0.45 A.

3multiple choice
3 marks

An electric oven of power 3 kW works for 2 hours per day. What electrical energy is consumed in 30 days?

Show answer

180 kWh

Daily energy = 3 × 2 = 6 kWh. In 30 days, energy = 6 × 30 = 180 kWh.

4multiple choice
3 marks

A 12 V battery sends a current of 2 A through a wire for 30 minutes. What electrical energy is supplied?

Show answer

43,200 J

Convert 30 minutes to 1800 s. Use W = VIt. So, W = 12 × 2 × 1800 = 43,200 J.

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Frequently Asked Questions

What are the important topics in Electricity for ICSE Class 8 Physics?
Key topics in Electricity include Current electricity is the electricity used, Potential difference is the work done, A household cable has three wires, Home appliances are connected in parallel. Study these first, then practise questions on each for Class 8 exams.
How many important questions are there in Electricity?
Super Tutor has 69 practice questions for Electricity, including multiple choice, true false questions. A sample with answers is on this page.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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All ICSE Class 8 Physics Important Questions

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