Use of fuses - Jamb Physics Past Questions and Answers

Question 1:

• JAMB 2019

If the time of flight is 96seconds, calculate the horizontal range through the point of projection.

A. 84400m
B. 69000m
C. 61440m
D. 24000m

Question 2:

• JAMB 1978

Every house supplied with electricity is provided with a box of fuses so that

A. The consumption of electricity can be recorded
B. People residing in the house will not have an electric shock if they touch a live wire
C. The total current drawn from the mains can be limited
D. The voltage supply can be stabilized
E. It serves as a standby supply when there is a power failure

Question 3:

• JAMB 1990

Which of the following is an essential physical property of the wires used for making fuses?

A. Low density
B. High thermal conductivity
C. Low electrical resistivity
D. Low melting point

Question 4:

• JAMB 1992

Which of the following apparatus will require the smallest fuse rating for its protection?

A. 60W, 240V
B. 60W, 40V
C. 40W, 12V
D. 40W, 5V

Question 5:

• JAMB 1995

The fig above shows two similar bulbs X and Y connected to suitable power supply with F as an appropriate fuse rating, if the filament of X breaks then the

A. Brightness Of Y will reduce
B. Brightness Of Y will remain constant
C. Brightness Of Y will increase
D. Fuse F will blow