Electrostatics - Jamb Physics Past Questions and Answers

Question 36:

• JAMB 2003

A positive charged rod X is brought near as uncharged metal sphere Y and is then touched by a finger with X still in place. When the finger is removed, the result is that y has

A. No charge and a zero potential
B. A positive charge and zero potential
C. A negative charge and positive potential
D. A negative charge and a negative potential

Question 37:

• JAMB 2003

An electron of charge 1.6 x 10^-19C is accelerated between two metal plates. If the kinetics energy of the electron is 4.8 x 10^-17J, the potential difference between the plate is

A. 30V
B. 40V
C. 300V
D. 400V

Question 38:

• JAMB 2004

If 16mA of current flows through a conductor in one second, the number of electron transported per seconds is
[1 electronic charge = 1.6 x 10^-19C]

A. 1.00 x 10²⁰
B. 2.56 x 10^-18
C. 2.56 x ^-17
D. 1.00 x 10¹⁷

Question 39:

• JAMB 2005

which of the following materials is a conductor?

A. Glass
B. Wax
C. Sodium
D. Plastic

Question 40:

• JAMB 2005

The electric field intensity in a place where a charge of 10^-10c experiences a force of 0.4N is?

A. 4.0 x 10⁷ NC^-1
B. 8.0 x 10⁹ NC^-1
C. 8.O x 10^-12 NC^-1
D. 4.0 x 10⁹ NC^-1