Physics Electrostatics Test Online Preparation Mcqs

Physics Electrostatics Test Online Preparation Mcqs With Answers Start Below

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Question 1 of 15

1. The number of electrons in one coloumb charge is equal to _________

A. 1.6x10-27

B. 6.2x1021

C. 6.2x1018

D. 1.6x10-19

Question 1 of 15

Question 2 of 15

2. A hollow metallic sphere of 8cm diameter is charged with 4x10^-8C. The potential on its surface will be:

A. 4.5x10-3 V

B. Zero

C. 45 x 10-3 V

D. 4x10-8 V

Question 2 of 15

Question 3 of 15

3. A capacitor of capacitance C has charge Q and stored energy is W. If the charge is increase to 2Q. the stored energy will be

A. W/2

B. 4W

C. W/4

D. 2W

Question 3 of 15

Question 4 of 15

4. Electric flux linked with a surface will be maximum when

A. The surface makes an angle of 45° with the field

B. The surface is held perpendicular to the electric field

C. All of the above

D. The surface is held parallel to the electric field

Question 4 of 15

Question 5 of 15

5. When we rub a glass rod with a silk cloth, then ______

A. Both glass rod and silk acquire positive charge

B. Glass rod acquires positive charge while silk acquires negative charge

C. Both glass rod and silk acquire negative charge

D. Glass rod acquires negative charge while silk acquires positive charge

Question 5 of 15

Question 6 of 15

6. Two charges are placed at a certain distance. If the magnitude of each charge is doubled, the force will become

A. 1/8th of its original value

B. 8 times of its original value

C. 1/4th of its original value

D. 4 times of its original value

Question 6 of 15

Question 7 of 15

7. If a 10 F capacitor is to have an energy content of 20J, it must be placed across potential difference of:

A. 2 volts

B. 9 volts

C. 4 volts

D. 1 volts

Question 7 of 15

Question 8 of 15

8. SI unit of permittivity of free space is _________

A. N-1mC-2

B. N-1m-2C2

C. NmC-1

D. Nm2C2

Question 8 of 15

Question 9 of 15

9. If a unit positive charge is placed in air then the flux coming out of it is

A. 4πϵ0

B. 4π/ϵ0

C. ϵ0-1

D. ϵ0

Question 9 of 15

Question 10 of 15

10. In EEG, voltage is plotted versus time. This voltage is produced by electrical activity of

A. Applied battery

B. Joints in human body

C. Spinal cord

D. Brain

Question 10 of 15

Question 11 of 15

11. Which one of the following under usual notation, can be taken as the measure of electric

A. q/ϵ0A

B. φ/A

C. φϵ0/A

D. F/A

Question 11 of 15

Question 12 of 15

12. Value of ϵ_r for various dielectric is always

A. Larger than unit

B. No hard and fast rule

C. Equal to unit

D. Less than unity

Question 12 of 15

Question 13 of 15

13. A 25eV electron has a speed of_________.

A. 4x106m/sec

B. 2x106m/sec

C. 5x106m/sec

D. 3x106m/sec

Question 13 of 15

Question 14 of 15

14. The similar charges each of one coulomb placed in air one meter apart repel each other with a force ________.

A. 9x107N

B. 9.2x104N

C. 9x109N

D. 9x10-9N

Question 14 of 15

Question 15 of 15

15. An electric charge at rest produces _________.

A. Neither electric field nor magnetic field

B. Both electric and magnetic fields

C. Only an electric field

D. Only a magnetic field

Question 15 of 15

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Physics Electrostatics Test Online Preparation Mcqs

Physics Electrostatics Test Online Preparation Mcqs With Answers Start Below

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