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NTS - NAT IE Test - Physics - Current Electricity - Quiz 4

Practice 10 high yield MCQs on Physics from Chapter Current Electricity for NAT IE Test. After submission, get instant results with correct answers and detailed explanations. This is Quiz 4 of the series.

31. What is the balance condition for a Wheatstone bridge?



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



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



34. Which instrument uses the Wheatstone bridge principle?



35. What is a potentiometer used for?



36. What principle does a potentiometer work on?



37. What is the potential gradient in a potentiometer?



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



39. What is the null point in a potentiometer?



40. If the balancing length for a cell is 50 cm and the potential gradient is 0.2 V/cm, what is the EMF of the cell?



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Instructions: Select one answer per question. After submitting, you will see your score, correct answers, and explanations.

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