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Electricity

ICSE · Class 8 · Physics

Flashcards for Electricity — ICSE Class 8 Physics. Quick Q&A cards covering key concepts, definitions, and formulas.

69 questions40 flashcards5 concepts

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40 Flashcards
Card 1Electric potential difference

State the relation between work done, charge, and potential difference.

Answer

Formula: W = QV Meaning: W = work or energy, Q = charge, V = potential difference. Units: W in joule (J), Q in coulomb (C), V in volt (V). Quick use: If Q = 2 C and V = 5 V, then W = 2 × 5 = 10 J.

Card 2Electric current

State the formula for current and charge.

Answer

Formula: I = Q/t, so Q = It Meaning: I = current, Q = charge, t = time. Units: I in ampere (A), Q in coulomb (C), t in second (s). Quick use: If I = 3 A for 4 s, then Q = 3 × 4 = 12 C.

Card 3Electrical energy

State the formula for electrical energy supplied in a circuit.

Answer

Formula: W = VIt Meaning: W = energy, V = potential difference, I = current, t = time. Units: W in joule (J), V in volt (V), I in ampere (A), t in second (s). Quick use: If V = 12 V, I = 2 A, and t = …

Card 4Electrical power

State the formula for electrical power.

Answer

Formula: P = W/t = VIt/t = VI Meaning: P = power, W = work or energy, V = voltage, I = current, t = time. Units: P in watt (W), V in volt (V), I in ampere (A). Quick use: If V = 220 V and I = 2 A, the…

Card 5Power calculation

An appliance works at 220 V and takes 2 A current. Find its power.

Answer

Given: V = 220 V, I = 2 A Formula: P = VI Step 1: Substitute values P = 220 V × 2 A Step 2: Multiply P = 440 W Answer: 440 W…

Card 6Charge calculation

A current of 3 A flows for 10 s. Find the charge transferred.

Answer

Given: I = 3 A, t = 10 s Formula: Q = It Step 1: Substitute values Q = 3 A × 10 s Step 2: Multiply Q = 30 C Answer: 30 C…

Card 7Work and potential difference

A potential difference of 12 V moves 5 C of charge. Find the work done.

Answer

Given: V = 12 V, Q = 5 C Formula: W = QV Step 1: Substitute values W = 5 C × 12 V Step 2: Multiply W = 60 J Answer: 60 J…

Card 8Safe current

An electric heater is rated 1500 W and works on 220 V. Find the safe current.

Answer

Given: P = 1500 W, V = 220 V Formula: I = Power of appliance / Voltage at which it works Step 1: Substitute values I = 1500 / 220 Step 2: Divide I = 6.8 A Answer: 6.8 A…

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Frequently Asked Questions

What are the important topics in Electricity for ICSE Class 8 Physics?
Electricity covers several key topics that are frequently asked in ICSE Class 8 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Electricity — ICSE Class 8 Physics?
Understand the core concepts first, then work through the 69 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.
How many flashcards are available for Electricity?
There are 40 flashcards for Electricity covering key definitions, formulas, and concepts. Use them daily for 10–15 minutes for best results.

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

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