Post Utme Physics Past Questions and Answers

Question 691:

Which of the following pairs is NOT part of the electromagnetic spectrum?
I. radio waves II. Beta rays III. Gamma rays IV. Alpha rays

A. I and III
B. I and II
C. III and IV
D. II and IV

Question 692:

The insulated charged spheres of different sizes and carrying opposite charges are connected together by a metallic conductor.
Current will flow from one sphere to the other until both spheres

A. Carry the same magnitude and sign of change
B. Are at the same potential
C. Are at the same temperature
D. Are of the same size

Question 693:

When a number of identical small magnets are arranged in a line, the strength of the resultant magnet

A. Is a largest when they area arranged end to end
B. Is greatest when they are arranged parallel with like poles adjacent to each other
C. Depends only on the number of magnets provided they are parallel
D. Is greater when the magnets are arranged on a wooden surface than on a meta surface

Question 694:

A bar magnet is most effectively demagnetized by ____________

A. Placing it in a N[sup]-S[\sup] position and hitting it with a hammer
B. Subjecting it to an electric current from a battery
C. Bringing its north pole in contact with the north pole of a very strong magnet
D. Heating the magnet.

Question 695:

The resistance of a 5cm uniform wire of cross sectional area 0.2 x10[sup]-6[\sup]m[sup]2[\sup] is 0.425
What is the resistively of the materials of the wire?

A. 1.10x 10[sup]-6[\sup]m
B. 4.25 x10[sup]-6[\sup]m
C. 2.40 x 10[sup]-6[\sup]m
D. 1.70 x10[sup]-6[\sup]m