CBSE Class 12 Physics Question Paper 2015 (Outside Delhi Set 1) with Answers (Compartment)

CBSE Class 12 Physics Question Paper 2015 (Outside Delhi Set 1) with Answers (Compartment). Students can download the last year question papers using the link below. Free download of examination question papers with solutions.Last 10 year question papers should be practised to get better marks in examinations.

Section – A

1. Why are electric field lines perpendicular at a point on an equipotential surface of a conductor ?

2. A variable frequency AC source is connected to a capacitor. Will the displacement current change if the frequency of the AC source is decreased ?

3. Draw the logic symbol of NAND gate and give its Truth Table.

4. Plot a graph showing variation of capacitive reactance with the change in the frequency of the AC source.

5. Distinguish between amplitude modulation and frequency modulation.

6. A square loop of side 20 cm carrying current of 1A is kept near an infinite long straight wire carrying a current of 2A in the same plane as shown in the figure. 

Calculate the magnitude and direction of the net force exerted on the loop due to the current carrying conductor.

OR

A square shaped plane coil of area 100 cm₂ of 200 turns carries a steady current of 5A. It is placed in a uniform magnetic field of 0.2 T acting perpendicular to the plane of the coil. Calculate the torque on the coil when its plane makes an angle of 60° with the direction of the field. In which orientation will the coil be in stable equilibrium ?

7. Name the types of e.m. radiations which (i) are used in destroying cancer cells,

(ii) cause tanning of the skin and (iii) maintain the earth’s warmth.

Write briefly a method of producing any one of these waves.

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