PU CSS 2026 Current Electricity Free Quiz 3

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PU CSS 2026 Current Electricity Free Quiz 3

PU CSS Quiz

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Remaining: 10

Navigator 10 Q

General

General 10 MCQs

21. At a junction, I₁=2A enters, I₂=3A enters, and I₃ leaves. What is I₃?

A. 1 A B. 6 A C. 5 A D. 3 A

22. What is true about current in a series circuit?

A. Current is same through all components B. Current is different through different components C. Voltage is same across all components D. Power is same across all components

23. What is a Wheatstone bridge used for?

A. Used to measure resistance B. Used to measure current C. Used to measure voltage D. Used to measure power

24. What happens to the galvanometer current when the Wheatstone bridge is balanced?

A. Maximum current flows B. Minimum current flows C. No current flows D. Infinite current flows

25. In a balanced Wheatstone bridge, P = 10 Ω, Q = 20 Ω, R = 15 Ω. What is S?

A. 15 Ω B. 10 Ω C. 20 Ω D. 30 Ω

26. Which instrument uses the Wheatstone bridge principle?

A. Metre bridge B. Potentiometer C. Galvanometer D. Ammeter

27. What is a potentiometer used for?

A. Measures EMF without drawing current B. Measures current C. Measures resistance D. Measures power

28. What is the potential gradient in a potentiometer?

A. k = I/L B. k = R/L C. k = V/L D. k = P/L

29. Why is a potentiometer more accurate than a voltmeter?

A. Less accurate than voltmeter B. Equally accurate as voltmeter C. Draws current D. More accurate than voltmeter

30. What is the null point in a potentiometer?

A. No deflection B. Maximum deflection C. Minimum deflection D. Infinite deflection

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