CBSE CLASS 12 BOARD EXAMINATION 2025 PHYSICS TWO MARKS QUESTIONS

1. In a certain 0.5 cm³ of space, electric potential is found to be 7 V throughout. What is the electric field in this region?

2. Charging current for a capacitor is 0.25 A. What is the displacement current across the plates?

3. Relative magnetic permeability of a magnetic material is 800. Identify nature of magnetic material and write its two properties.

4. Identify the part of the em spectrum which is (i) suitable for radar system used in aircraft navigation (ii) produced by bombarding a metal target by high speed electrons

5. What is work function of a metal? How does its value influence the KE of the electrons liberated during photoelectron emission?

6. Distinguish between dielectric and conductor

7. Alloys of metals have greater resistivity than their constituent metals. Why?

8. Define uniform magnetic field. Represent it geometrically.

9. A magnetic needle suspended freely in uniform magnetic field experiences a torque but no net force. An iron nail near a bar magnet however experiences a force of attraction in addition to torque. Why?

10. Why is use of AC over DC voltage preferred? Give two reasons

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