Post Utme Physics Past Questions and Answers

Question 891:

A satellite in a circular orbit around earth with constant speed but not a constant velocity. Which of the following statement best explains why the satellite velocity is not constant?

A. The radius of the satellite’s orbit is not larger
B. The force on the satellite mass is constanty decreasing
C. The magnitude of the satellite momentum is large
D. The direction of the satellite’ s motion is constantly changing

Question 892:

Which of the following statements describe electric generator?

A. A magnet is rotated through a coil of wire to produce an electric current
B. Hectric potential in a rotating coil of wire on permanent magnet.
C. An electrical current causes a coil of wire in a magnetic field
D. Forces from a permanent magnet allow a coil wire to rotate

Question 893:

A neutral balloon is rubbed with a piece of cloth. As a result, the balloon has a negative charge. Which of the following best explain why the balloon has a negative charge?

A. The balloon is a conductor
B. The balloon is an insulator
C. The balloon transfer charges to the cloth
D. The balloon receive charges from the doth

Question 894:

What is the magnitude of the momentum 0.50kg bail moving in a straight line at 5.0 m/s ____________

A. 0.1kg m/s
B. 2.5kg m/s
C. 6.3kg m/s
D. 10kg m/s

Question 895:

The human ear is most sensitive to sound that has frequency of about 4000Hz. Assume that the speed of sound in air is 350 m/s. what is the wavelength of a sound heard in the air with this frequency?

A. 0.043 m
B. 0.085 m
C. 12m
D. 340m