Punjab 12th Class Physics Chapter 1 Electrostatics Mcqs Test Online

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Question 1 of 10

Physics

1. Electric potential of earth is taken to be zero because the earth is good.

1.Dielectric

2.Conductor

3.Semiconductor

4.Insulator

Question 1 of 10

Question 2 of 10

2. In the figure below, the charge on 3 μF capacitor is:

1.3 μ C

2.5 μ C

3.10 μ C

4.6 μ C

Question 2 of 10

Question 3 of 10

3. The electric flux through the surface of a sphere due to a charge q placed at its center depends upon:

1.The quantity of charge inside the sphere

2.The surface area of the sphere

3.The radius of the sphere

4.The quantity of charge outside the sphere

Question 3 of 10

Question 4 of 10

4. Two parallel, metal plates are a distance 8.00 m apart the electric field between the plates is uniform, directed toward the right, and has a magnitude of 4.00 N/C. If an ion of charge+ 2e is released at rest at the left-hand plate, what is its kinetic energy when it reaches the right-hand plate.

1.32 eV

2.16 eV

3.4 eV

4.64 eV

Question 4 of 10

Question 5 of 10

5. A capacitor is charged with a battery and then it is disconnected. A slab of dielectric is now inserted between the plates, then:

1.Potential difference between the plates increase, stored energy decreases and charge remains the same

2.Potential difference between the plates decreases, stored energy decreases and charge remains the same

3.Potential difference between the plates decreases, stored energy decreases and charge remains unchanged

4.The charge in the plates reduces and potential difference increase

Question 5 of 10

Question 6 of 10

6. The electric potential between two points A and B is ∆V. The work done W by the field in moving a charge q from A to B is:

1.W = ∆V/q

2.W = -q ∆V

3.W = -∆V/q

4.W = q ∆V

Question 6 of 10

Question 7 of 10

7. A one microfarad capacitor of a TV is subjected to 400 V potential difference. The energy stored in capacitor is:

1.4 x 10⁻³J

2.16 J

3.2 x 10⁻³J

4.8 J

Question 7 of 10

Question 8 of 10

8. A proton is about 1840 time heavier than an electron. When it is accelerated by a potential difference if 1 kV, its kinetic energy will be:

1.930 keV

2.1 keV

3.1/1840 keV

4.1840 keV

Question 8 of 10

Question 9 of 10

9. A charge Q is divided into two parts q and Q-q and separated by a distance R. The force of repulsion between them will be maximum when.

1.q = Q/2

2.None of these

3.q = Q/4

4.q = Q

Question 9 of 10

Question 10 of 10

10. Some charge is being given to a conductor. Then its potential:

1.Is maximum at surface

2.Is maximum somewhere between surface and center

3.Is remain same throughout the conductor

4.Is maximum at center

Question 10 of 10

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