Jamb Physics 1982 Past Questions and Answers

Question 26:

• JAMB 1982

A high-resistance voltmeter reads 3.0V when connected across the terminals of a battery on open circuit and 2.6V when the battery supplies a current of 0.2A through a lamp. The resistance of lamp is

A. 2.00\(\Omega\)
B. 13.00\(\Omega\)
C. 0.52\(\Omega\)
D. 0.13\(\Omega\)
E. 1.50\(\Omega\)

Question 27:

• JAMB 1982

A magnetic needle is suspended first at the earth's north magnetic pole and then at a point on the magnetic equator. The respective angles between the needle and the horizontal are

A. 0^o and 0^o
B. 60^o and 60^o
C. 90^o and 90^o
D. 90^o and 0^o
E. 0^o and 90^o

Question 28:

• JAMB 1982

The equation P^xV^yT^z = constant

A. X = 0, y = 0, z = 1
B. X = 1, y = 0, z = 0
C. X = 1, y = 1, z = 0
D. X = 1, y = 1, z = 1
E. X = 1, y = 1, z = -1

Question 29:

• JAMB 1982

The area under a force-distance graph represents

A. Acceleration
B. Velocity
C. Power
D. Work
E. Momentum

Question 30:

• JAMB 1982

A hot metal ball is suspended in the open air. As it cools it loses heat by

A. Conduction only
B. Convection only
C. Radiation only
D. Conduction and convection
E. Convection and evaporation