Post Utme Physics Past Questions and Answers

Question 776:

The main purpose of the transformer in an AC radio is to ____________

A. Increase power to the radio
B. Convert energy from AC to DC
C. Step down the voltage
D. Step up the voltage

Question 777:

An electric heater with a p.d. of 240v connected across a terminal has a total resistance of 960n. Find the power rating of the heater.

A. 4.0w
B. 0.1w C
C. 60.00W
D. 38.40W

Question 778:

The wavelength of the first overtone of note in a pipe of length 33cm is ____________

A. 44cm
B. 33cm
C. 22cm
D. 17cm

Question 779:

The minimum energy required to remove an electron from an atom is known as

A. Excitation energy
B. Ionization energy
C. Binding energy
D. Photon energy

Question 780:

Nuclear fission is preferred to fusion in the generation of energy because

A. Very high temperatures are required for fission
B. The raw materials for fusion are not easily obtained
C. Energy obtained from fusion is relatively smaller
D. The by-products of fusion are very dangerous