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Chapter 3 - Current Electricity | 5 questions

Timed test. Answer every question before time runs out. Correct answers and solutions appear after submission.
Time remaining 480
Question 1 of 5
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Question 1 of 5
CBSE Past Year 2026

Assertion (A): In a Wheatstone bridge circuit, if we interchange the position of the cell and the galvanometer, the balance condition \(\frac{P}{Q}=\frac{R}{S}\) remains unchanged.

Reason (R): \(\frac{P}{Q}=\frac{R}{S}\Rightarrow\frac{Q}{S}=\frac{P}{R}\) so balance condition remains same.

Select one option. Answers are shown after the test.
Question 2 of 5
CBSE Past Year 2026

Which of the following characteristics of electrons determines the current in the conductor ?

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Question 3 of 5
CBSE Past Year 2026

The resistivity ρ of a metal increases with rise in temperature because :

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Question 4 of 5
CBSE Past Year 2026

A wire is gradually stretched to make it 100% longer. Its resistance will increase by :

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Question 5 of 5
CBSE Past Year 2026

Assertion (A) : The work done, in taking a unit charge around a closed loop of an electric circuit involving cells and resistors in the loop, is zero.

Reason (R) : The potential at a point depends on the location of the point in the loop. After completing one round, the charge comes back to the point of start.

Select one option. Answers are shown after the test.