Class 7 Science Chapter 3: Electricity: Circuits and their Components — practice questions with answers
Free practice for Class 7 Science, Chapter 3: Electricity: Circuits and their Components. Try the solved questions below, then take a free test with instant marking and explanations.
27 questions11 easy, 12 medium, 4 hardNCERT · CBSE · State boards
Sample questions with solutions
Q1. At the Bhakra Nangal Dam power house, what is used to generate electricity?
- The force of falling water
- Coal
- Sunlight
- Wind
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Answer: A. The force of falling water
Why: The hydroelectric power house uses the force of falling water. [p.23]
Why: The hydroelectric power house uses the force of falling water. [p.23]
Q2. Which of these are ways of generating electricity mentioned in the chapter? (Tick all that apply)
- Windmills
- Solar panels
- Falling water
- Burning plastic toys
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Answer: A. Windmills; B. Solar panels; C. Falling water
Why: Electricity is generated by windmills, solar panels, falling water, natural gas and coal. [p.24]
Why: Electricity is generated by windmills, solar panels, falling water, natural gas and coal. [p.24]
Q3. On an electric cell, which part is the positive terminal?
- The small protruding metal cap
- The flat metal disc
- The paper covering
- The middle of the cell
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Answer: A. The small protruding metal cap
Why: The metal cap is positive (+) and the flat metal disc is negative (–). [p.25]
Why: The metal cap is positive (+) and the flat metal disc is negative (–). [p.25]
Q4. An electric cell is described as ______.
- a portable source of electrical energy
- a type of lamp
- a switch
- an insulator
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Answer: A. a portable source of electrical energy
Why: The electric cell is a portable source of electrical energy. [p.25]
Why: The electric cell is a portable source of electrical energy. [p.25]
Q5. Two or more cells connected together form a ______.
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Answer: battery
Why: Cells joined together make a battery; the term is also used for a single cell. [p.26]
Why: Cells joined together make a battery; the term is also used for a single cell. [p.26]
Q6. In an incandescent lamp, what glows to produce light?
- The thin filament wire, which gets hot
- The glass bulb
- The metal case
- The insulator
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Answer: A. The thin filament wire, which gets hot
Why: The filament gets hot and glows when current passes through it. [p.26, p.37]
Why: The filament gets hot and glows when current passes through it. [p.26, p.37]
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Frequently asked questions
How many practice questions are there for Class 7 Science Chapter 3: Electricity: Circuits and their Components?
27 questions (11 easy, 12 medium, 4 hard). A few are solved on this page; the free test shows the answer and explanation for every question after you submit.
Is this chapter from the NCERT book?
Yes — it follows the NCERT Class 7 Science syllabus, used by CBSE and many state boards.