Magnets and Magnetic Fields - Jamb Physics Past Questions and Answers

Question 11:

• JAMB 1984

A short bar magnet is placed in earth's magnetic field, as shown above, which of the points II and III are/is possible positions of a neutral point?

A. I only
B. II only
C. III only
D. I and II
E. I,II and III

Question 12:

• JAMB 1985

Which of the following methods CANNOT be used to produce a steel magnet? The

A. Passing of an electric current through a solenoid
B. Repeated stroking of the specimen with a magnet
C. Repeated stroking of the specimen in opposite directions with magnets
D. Heating of the specimen
E. Hammering of the specimen in the earth's magnetic field

Question 13:

• JAMB 1986

Which of the following is true of magnetism?

A. Iron fillings cling mainly round the ends of a bar magnet
B. The freely suspended bar magnet comes to rest in the geographic north-south direction
C. Like poles attract
D. Iodestone is a non-magnetic oxide

Question 14:

• JAMB 1986

The angle between the magnetic meridian and the geographic meridian at a locality on the earth is the

A. Longitude of the locality
B. Angle of inclination at the locality
C. Latitude of the locality
D. Angle of declination of the locality

Question 15:

• JAMB 1986

If the inclination at Ibadan is 7^oS, this means that

A. The angle between the geographic meridian and the magnetic meridian at Ibadan is 7^o
B. The earth's magnetic intensity at Ibadan makes angle 7^o with the horizontal direction
C. A magnetic needle will be inclined at 7^o to the vertical at Ibadan
D. The north pole of a magnetic needle dips downward at Ibadan