Electrostatics - Jamb Physics Past Questions and Answers

Question 11:

• JAMB 1984

A particle moves in a circular orbit of radius 0.02m. If the speed of the particle is 0.88ms^-1, calculate its frequency in cycles per second

A. 2.0Hz
B. 7.0Hz
C. 8.8Hz
D. 14.0Hz
E. 17.6Hz

Question 12:

• JAMB 1984

Cathode rays are

A. High-energy electromagnetic waves
B. Protons
C. Streams of electrons
D. Neutrons
E. Radio waves

Question 13:

• JAMB 1985

A charge of one coulomb liberates 0.0033g of copper in an electrolytic process. How long will it take a current of 2A to librate 1.98g of copper in such a process?

A. 5 mins
B. 30 mins
C. 50 mins
D. 60 mins
E. 120 mins

Question 14:

• JAMB 1985

If the distance between two stationary charged particle is doubled, the magnitude of the electro-static force between them will be

A. Doubled
B. Halved
C. A quarter of its former value
D. Unchanged
E. Four times the original value

Question 15:

• JAMB 1986

The sign of the change on a charged glass rod may be determined with

A. A charged electroscope
B. An uncharged electroscope
C. A galvanometer
D. An electrometer