Self and Mutual Inductance MCQs
Self and Mutual Inductance – MCQs
Class: 12 | Subject: Physics |
Section: Electromagnetic Induction & Alternating Current |
Topic: Self and Mutual Inductance
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. Self inductance is the property of a coil by which it opposes change in:
Answer: B
Self inductance opposes change in current flowing through the coil.
Self inductance opposes change in current flowing through the coil.
2. SI unit of inductance:
Answer: C
Unit is Henry (H).
Unit is Henry (H).
3. Self induced emf formula:
Answer: B
Negative sign due to Lenz’s law.
Negative sign due to Lenz’s law.
4. Inductance depends on:
Answer: D
All affect flux linkage.
All affect flux linkage.
5. Mutual inductance occurs between:
Answer: A
Changing current in one induces emf in other.
Changing current in one induces emf in other.
6. Mutual inductance unit:
Answer: A
Same as self inductance.
Same as self inductance.
7. Transformer works on:
Answer: B
Flux linkage principle.
Flux linkage principle.
8. Induced emf proportional to:
Answer: A
Rate of current change.
Rate of current change.
9. Energy stored in inductor:
Answer: A
Magnetic energy storage.
Magnetic energy storage.
10. Inductor resists change in:
Answer: A
Due to back emf.
Due to back emf.
11. Coupling coefficient range:
Answer: A
Perfect coupling = 1.
Perfect coupling = 1.
12. Perfect coupling when k =
Answer: C
All flux linked.
All flux linked.
13. Mutual inductance increases with:
Answer: D
Enhances flux linkage.
Enhances flux linkage.
14. Back emf arises due to:
Answer: A
Opposes current change.
Opposes current change.
15. Inductance of solenoid ∝
Answer: D
L ∝ N²A/l.
L ∝ N²A/l.
16. Magnetic core increases:
Answer: B
Higher permeability.
Higher permeability.
17. Air core vs iron core L:
Answer: B
Due to permeability.
Due to permeability.
18. Mutual inductance symbol:
Answer: B
Standard notation.
Standard notation.
19. Inductor behaves like:
Answer: B
Stores magnetic energy.
Stores magnetic energy.
20. Sudden current interruption causes:
Answer: B
Large di/dt → large emf.
Large di/dt → large emf.
