Magnets and Magnetic Fields - Jamb Physics Past Questions and Answers

Question 61:

• JAMB 2019

When the downward current flows in a straight vertical conductor, the direction of its magnetic field at a point due north of the wire is

A. Upward
B. North
C. South
D. West

Question 62:

• JAMB 2019

Which of the following statement about the electromagnet shown above is correct?

A. When the current flows from A to B, the end A will be in north pole
B. When the current flows from A to B, the end A will be south pole
C. When the current flows from A to B, the end B will be north pole
D. None of the above

Question 63:

• JAMB 2019

The Earth's magnetic equator passes through Jos in Nigeria. At Jos, the

A. Angle of variation is zero
B. Magnetic declination is 90
C. Angle of dip is zero
D. Horizontal component at the Earth's field is zero

Question 64:

• JAMB 2019

The Earth's magnetic equator passes through Jos in Nigeria. At Jos, the

A. Angle of variation is zero
B. Magnetic declination is 90
C. Angle of dip is zero
D. Horizontal component at the Earth's field is zero

Question 65:

• JAMB 2019

A coil X is moved quickly away from the end Y of a stationary metal bar and a current then flows in X as shown above.
Then


A. The bar is not a magnet
B. Y is a north pole
C. Y is a South pole
D. Y repels coil X