Post Utme Physics Past Questions and Answers

Question 396:

When heat energy is added to a system which of thefollowing observations usually occur:
(I) The internal energy of the system increases;
(II) Work may be done on the surroundings;
(III)The volume of system is directly proportional to the temperature.

A. I and II only
B. I, II and III
C. III only
D. None of the above.

Question 397:

The transfer of heat energy from one part of a body to another part without the actual movement of any part of the body is called convection.

A. True
B. False
C. Neither true nor false
D. I can not tell.

Question 398:

Which of the following quantities are scalars?
I. Mass II. Work III. force IV. Magnetic

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

Question 399:

A force (151-16j+27k)N is added to a force (23j- 40k)N.
What is the magnitude of the resultant?

A. 17N
B. 28N.
C. 63N
D. 21N

Question 400:

Which of the following statements is/are correct about an object in equilibrium underparallel forces?
I. The total force in one direction equals the total force in the opposite direction.
II. The body must not rotate.
III The resolved components along the x-axis equals the resolved components along the y-axis.

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