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CBSE Class 10 Science Competency Based Questions

Original CBSE Class 10 Science Electricity competency based questions for application, reasoning, circuits, calculations and board-style problem solving.

ChapterTopic

Question 1MCQ · Apply · 1 mark

Electricity · Electric current and charge

At a point in a wire, current is $0.80$ A. Approximately how many electrons pass per second?

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Question 2MCQ · Apply · 1 mark

Electricity · Electric current and charge

A charge of $3.2$ C passes through a wire in $8$ s. The number of electrons is:

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Question 3MCQ · Understand · 1 mark

Electricity · Potential difference and meters

Which expression gives energy transferred to charge $Q$ through potential difference $V$ ?

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Question 4MCQ · Apply · 1 mark

Electricity · Potential difference and meters

A student measures current through a lamp and voltage across it. Which connection is correct?

Circuit diagram showing an ammeter in series and a voltmeter across a resistor. — Ammeter in series and voltmeter across the resistor.

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Question 5MCQ · Apply · 1 mark

Electricity · Potential difference and meters

A $6$ V cell drives a $3Ω$ resistor. Where should the voltmeter be connected?

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Question 6MCQ · Analyse · 1 mark

Electricity · Resistance and resistivity

On an $I$ versus $V$ plot, line A has slope $0.5$ A/V and line B has slope $0.25$ A/V. Which resistance is larger?

I versus V graph with two straight lines of different slopes. — The steeper I-V line has lower resistance.

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Question 7MCQ · Apply · 1 mark

Electricity · Resistance and resistivity

A wire of given material and length is replaced by one with twice the diameter. Its new resistance is:

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Question 8MCQ · Apply · 1 mark

Electricity · Resistance and resistivity

Wire B is three times as long as wire A but has the same resistance and material. What is $A_{B} : A_{A}$ ?

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Question 9MCQ · Analyse · 1 mark

Electricity · Resistance and resistivity

For equal-material wires, which has the least resistance?

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Question 10MCQ · Apply · 1 mark

Electricity · Resistance and resistivity

Wire B has length $4 L$ and resistance $2 R$ compared with wire A of length $L$ , resistance $R$ and area $A$ . Its cross-section is:

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