Electrostatics - Jamb Physics Past Questions and Answers

Question 56:

• JAMB 2012

A student is at a height 4m above the ground during a thunderstorm. Give that the potential difference between the thundercloud and the ground is 10⁷v, the electric field created by the storm is

A. 2.0 * 10⁶ NC ^-1
B. 2. 5 * 10⁶ NC ^-1
C. 1.0 * 10⁷ NC ^-1
D. 4.0 * 10⁷ NC ^-1

Question 57:

• JAMB 2012

the ratio of electrostatic force F_E to gravitational force F_G between two protons each of charge e and mass m, at a distance d is

A. E/4πԐoGm
B. E²/Gm²
C. Gm²/4πԐoe²
D. E²/4πԐoeGm²

Question 58:

• JAMB 2013

Calculate the force acting on an electron of charge 1.5 x 10^-19C placed in an electric field of intensity 10⁵Vm^-1

A. 1.5x10^-11N
B. 1.5x10^-12N
C. 1.5x10^-13N
D. 1.5x10^-14N

Question 59:

• JAMB 2013

When a charge moves through an electric circuit in the direction of an electric force, it

A. Gains both potential and kinetic energy
B. Gains potential energy and lose kinetic energy
C. Loses potential energy and gains kinetic energy
D. Loses both potential and kinetic energy

Question 60:

• JAMB 2013

If a current of 2.5A flows through an electrolyte for 3 hours and 1.8g of a substance is deposited, what is the mass of the substance that will be deposited if a current of 4A flows through it for 4.8 hours?

A. 2.4g
B. 3.2g
C. 4.6g
D. 4.8g