Case Study MCQs for CBSE Class 12 Physics
Case Study MCQs for CBSE Class 12 Physics
Class: CBSE Class 12 | Subject: Physics
Section 10: Experimental Skills
Topic: Case Study Based Questions
Based on CBSE Board Examination Pattern
Section 10: Experimental Skills
Topic: Case Study Based Questions
Based on CBSE Board Examination Pattern
Instructions: These Multiple Choice Questions (MCQs) are designed strictly as per the NCERT syllabus and CBSE practical & case‑study exam pattern.
A student performs an experiment to verify Ohm’s Law by measuring voltage across and current through a resistor using a voltmeter and ammeter.
1. The graph between V and I will be:
Answer: B
Ohm’s law gives V ∝ I, hence linear graph.
Ohm’s law gives V ∝ I, hence linear graph.
In a meter bridge experiment, balancing length is found near 50 cm.
2. This indicates resistances are:
Answer: B
Balance near midpoint → equal resistances.
Balance near midpoint → equal resistances.
A prism experiment is conducted to determine refractive index using angle of minimum deviation.
3. Refractive index depends on:
Answer: A
Property of optical medium.
Property of optical medium.
Young’s Double Slit Experiment produces interference fringes.
4. Fringe width increases if:
Answer: B
β = λD/d → directly proportional to λ.
β = λD/d → directly proportional to λ.
A potentiometer compares EMF of two cells.
5. Balance length proportional to:
Answer: C
Principle: potential drop ∝ length.
Principle: potential drop ∝ length.
Photoelectric effect setup used.
6. Stopping potential depends on:
Answer: B
Determines max KE.
Determines max KE.
Diffraction grating experiment performed.
7. Angular separation depends on:
Answer: A
λ determines diffraction angle.
λ determines diffraction angle.
Galvanometer converted to ammeter.
8. Required component:
Answer: B
Low resistance shunt.
Low resistance shunt.
Convex lens focal length measured.
9. Lens formula:
Answer: B
AC circuit power measured.
10. Power factor =
Answer: B
11. Screw gauge measures:
Answer: B
12. Least count depends on:
Answer: C
13. Vernier caliper accuracy:
Answer: B
14. Parallax error avoided by:
Answer: B
15. Ammeter connected in:
Answer: A
16. Voltmeter resistance:
Answer: A
17. Potentiometer more accurate because:
Answer: A
18. Interference proves light is:
Answer: B
19. Semiconductor resistance with temperature:
Answer: B
20. Logic probe detects:
Answer: B
