1) 1. The principle of a potentiometer is that the potential drop across a wire is proportional to its: a) A. Thickness b) B. Length c) C. Material d) D. Temperature 2) 2. A potentiometer works on the method of: a) A. Maximum deflection b) B. Null deflection c) C. Least count d) D. Resonance 3) 3. The potential gradient of a potentiometer wire depends on: a) A. Length of wire only b) B. Current through the wire c) C. Resistance of wire d) D. All of these 4) 4. The potential drop along a potentiometer wire is uniform because the wire is: a) A. Thick b) B. Short c) C. Uniform in cross-section d) D. Bent 5) 5. If the current in a potentiometer wire is increased, the potential gradient will: a) A. Decrease b) B. Become zero c) C. Increase d) D. Remain constant 6) 6. In a potentiometer, the balancing point is obtained when: a) A. Voltmeter shows maximum reading b) B. Galvanometer shows zero deflection c) C. Current is maximum d) D. Resistance is minimum 7) 7. The variation of potential drop along a potentiometer wire is: a) A. Random b) B. Exponential c) C. Linear d) D. Parabolic 8) 8. The EMF of a cell can be measured accurately using a potentiometer because it: a) A. Has very low resistance b) B. Draws no current from the cell c) C. Uses digital display d) D. Has short wire 9) 9. The potential drop per unit length of the potentiometer wire is called: a) A. Resistance b) B. EMF c) C. Potential gradient d) D. Current density 10) 10. For greater sensitivity of a potentiometer, the wire should be: a) A. Short and thick b) B. Long and uniform c) C. Non-uniform d) D. Bent in shape

JKC Activity: To Study the Variation of Potential Drop

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