Current Electricity - Meter Bridge, Potentiometer

Grade 12 Physics — Current Electricity - Meter Bridge, Potentiometer: 25 practice questions with instant scoring and explanations.

1. Meter bridge is used to find:
2. The balancing length in meter bridge is determined by:
3. Meter bridge wire is typically made of:
4. If balancing length is 60 cm with known R=20 Ω in left, unknown S = :
5. In meter bridge, why is galvanometer placed between C and D (jockey):
6. Potentiometer wire is selected to have:
7. Potentiometer can compare:
8. Sensitivity of potentiometer increases with:
9. If potentiometer wire resistance is made smaller, gradient:
10. Internal resistance of cell found by potentiometer using:
11. In potentiometer, driver cell must have:
12. Length l₁ balances EMF ε₁, l₂ balances ε₂. Ratio ε₁/ε₂ = :
13. For internal resistance, balance length with open circuit l₁ and with resistance R l₂:
14. Precautions in potentiometer experiment include:
15. Why is potentiometer called an ideal voltmeter?
16. In meter bridge, end corrections are needed because:
17. Slide wire resistance per unit length is called:
18. In meter bridge with wire of 100 cm and balance at 40 cm, R=4 Ω, S = :
19. If jockey presses the wire firmly:
20. Meter bridge is less accurate when unknown resistance is:
21. A galvanometer can be used as a null detector in:
22. The standard cell used in potentiometer is:
23. EMF of Weston cadmium cell ≈ :
24. Specific resistance (resistivity) of meter bridge wire is best:
25. The meter bridge uses which resistance combination principle?