Wheatstone Bridge & Meter Bridge MCQs
Wheatstone Bridge & Meter Bridge – MCQs
Class: 12 | Subject: Physics |
Section: Current Electricity |
Topic: Wheatstone Bridge & Meter Bridge
Based on: NCERT Syllabus | CBSE Board Examination Standard
Based on: NCERT Syllabus | CBSE Board Examination Standard
Instructions: These Multiple Choice Questions (MCQs) are designed strictly as per the NCERT syllabus, making them ideal for CBSE Class 12 Board Examination preparation.
1. Wheatstone bridge is used to measure:
Answer: C
It accurately determines an unknown resistance by balancing the bridge.
It accurately determines an unknown resistance by balancing the bridge.
2. Bridge is balanced when galvanometer current is:
Answer: C
No potential difference across galvanometer.
No potential difference across galvanometer.
3. Balance condition of Wheatstone bridge:
Answer: B
Ratio of resistances must be equal.
Ratio of resistances must be equal.
4. Meter bridge works on principle of:
Answer: C
It is a practical form of Wheatstone bridge.
It is a practical form of Wheatstone bridge.
5. Length of meter bridge wire is:
Answer: C
Standard wire length is 1 metre.
Standard wire length is 1 metre.
6. Balance point depends on:
Answer: A
Determined by resistance ratio.
Determined by resistance ratio.
7. At balance, potential difference across galvanometer:
Answer: C
No current flows.
No current flows.
8. Sensitivity increases when wire is:
Answer: B
Higher resistance improves sensitivity.
Higher resistance improves sensitivity.
9. End error occurs due to:
Answer: B
At junction contacts.
At junction contacts.
10. Meter bridge uses wire of:
Answer: B
Uniform resistivity.
Uniform resistivity.
11. Unknown resistance increases → balance length:
Answer: A
Proportional relation.
Proportional relation.
12. Galvanometer detects:
Answer: B
Sensitive current detector.
Sensitive current detector.
13. Slide wire bridge another name:
Answer: B
Common lab name.
Common lab name.
14. Balance independent of:
Answer: A
Ratio method cancels emf.
Ratio method cancels emf.
15. Maximum sensitivity near:
Answer: C
Midpoint most accurate.
Midpoint most accurate.
16. Galvanometer shows deflection → bridge:
Answer: B
Current flows.
Current flows.
17. Meter bridge accuracy depends on:
Answer: A
Uniform resistivity essential.
Uniform resistivity essential.
18. If both gaps equal resistances → balance length:
Answer: B
Equal ratio.
Equal ratio.
19. Bridge method advantage:
Answer: A
Null method accuracy.
Null method accuracy.
20. Wheatstone bridge fails for:
Answer: C
Measurement becomes inaccurate.
Measurement becomes inaccurate.