Magnets and Magnetic Fields - Jamb Physics Past Questions and Answers

Question 41:

• JAMB 2004

To protect a material from the influnce of an external magnetic field, the materials should be kept

A. Square steel ring
B. Triangular zinc ring
C. Soft iron ring
D. Loop of copper wire

Question 42:

• JAMB 2005

a proton moving with a speed of 1.0 x 10⁶ms^-1 through a magnetic field of 1.0T experiences a magnetic force of magnitude 8.0 x 10^-14 N. The angle between the proton''s velocity and the field is

A. 60°
B. 90°
C. 30°
D. 45°

Question 43:

• JAMB 2005

The north pole of a magnet can never be separated from the south pole because of the property knowledge as?

A. Magnetic octopole
B. Magnetic monopole
C. Magnetic dipole
D. Magnetic quadrupole

Question 44:

• JAMB 2005

Two charged particles are projected into a region where there is a magnetic field perpendicular to their velocities. if the charges are deflected in opposite directions, which of the following statements is true of the charge?

A. The charge must be of opposite sign
B. Positive charges are more in number
C. The charges are electrically neutral
D. The charges are of the same sign

Question 45:

• JAMB 2007

In the diagram above , if the magnetic field points into the paper and the force on a current - carrying conductor points upwards, what is the direction of the current?

A. Upwards
B. Downwards
C. Right
D. Left