CBSE Class 12 Physics Graded Exercise Questions

LEVEL –1

1. How many electrons will have a total charge of 1 coulomb?

2. Find the electric field intensity due to a charge of 5 × 10-8 C at a point 50 cm from it in vacuum

3. An electric charge of 2 µ c experience an electric force of 3.2 × 10-3 N when kept at a point in vacuum. What is the electric field intensity at that point?

4. An electric dipole consists of two charges of magnitude 1 µ c. They are placed 3 cm apart in a uniform electric field of 100 N C^-1 acting at right angles to the axis of dipole. Calculate

a. dipole moment of electric dipole

b. electric force acting on either charge

c. Torque acting on dipole

5. An electric dipole is held at an angle of 30^o with respect to a uniform electric filed of 2 × 104 NC-1 experiencing a torque of 18 × 10^-25 Nm. Calculate the dipole moment of the dipole

6. Electric potential at a point is 200 Volt. How much work will be down in bringing an α particle from infinity to that point (Charge on an α - particle is 3.2 × 10^-19 C)

7. Find the potential at a point 30 cm from a point charge of 2 × 10^-8 C in vacuum

8. An electric field at a point due to a point charge is 20 N / C and the electric potential at that point is 10 J / C. Calculate the distance of the point from the charge and also the magnitude of the charge.

9. A Cube of side b has a charge q at each of its eight vertices. Determine the potential and electric field due to these array at the centre of the cube.

10. A uniformly charged conducting sphere of 2.4 m diameter has a surface charge density of 80.0 µ C. m^-2. Find

(a) The charge on the sphere and

(b) total electric flux leaving the surface of sphere.

11. What is the area of the plate of a 2 F parallel plate capacitor with plate separation of 0.5 cm? Why does ordinary capacitor have capacitance of order of microfarads?

Please refer to the link below for CBSE Class 12 Physics Graded Exercise Questions