Jamb Physics 2005 Past Questions and Answers

Question 16:

• JAMB 2005

the ray which causes gas molecules to glow is known as

A. Cathode ray
B. Anode ray
C. Molecular ray
D. Gamma ray

Question 17:

• JAMB 2005

A transformer is rated 240v. If the primary coil is 4000 turns and the secondary voltage 12v, determine the number of turns in the secondary coil.

A. 200
B. 100
C. 250
D. 150

Question 18:

• JAMB 2005

The current in a reverse-biased junction is due to?

A. Minority carriers
B. Electrons
C. Majority carriers
D. Holes

Question 19:

• JAMB 2005

which of the following materials is a conductor?

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

Question 20:

• JAMB 2005

When the temperature difference between the wet and dry bulbs of a hygrometer is high, this indicates that

A. It is about to rain
B. The relative humidity is high
C. There is plenty of sunshine
D. The relative humidity is low