Jamb Physics 1995 Past Questions and Answers

Question 31:

• JAMB 1995

At different locations on the earth's surface, the earth's magnetic field is

A. The same in magnitude and direction
B. The same in magnitude but different in direction
C. Different in both magnitude and direction
D. Different in magnitude but different in direction

Question 32:

• JAMB 1995

If a resistance is halved in value and the potential difference across it is tripled, then the ratio of the new current to the old one is

A. 1 : 6
B. 1 : 3
C. 2 : 1
D. 6 : 1

Question 33:

• JAMB 1995

A 12V battery has an internal resistance of 0.5W.If a cable of 1.0W resistance is connected across the two terminals of the battery, the current drawn from the battery is

A. 16.0A
B. 8.0A
C. 0.8A
D. 0.4A

Question 34:

• JAMB 1995

The purpose of a dielectric material in a parallel plate capacitor is to

A. Increase its capacitance
B. Decrease its capacitance
C. Insulate the plate from each other
D. Increase the magnetic field between the plates

Question 35:

• JAMB 1995

An electric current of 2 amperes flows in a heating coil of resistance 50 ohms for 3 minutes 20 seconds. Determine the heat produced

A. 0.5kJ
B. 8.0kJ
C. 20.0kJ
D. 40.0kJ