Post Utme Physics Past Questions and Answers

Question 1271:

If two masses \(40 g\) and \(60 g\) respectively, are attached firmly to the end of a light metre rule, what is the centre of gravity of the system?

A. At the mid point of the metre rule
B. \(40 cm\) from the lighter mass
C. \(40 cm\) from the heavier masses
D. \(60 cm\) from the heavier mass
E. Indeterminate because the metre rules is light

Question 1272:

To find the dept of the sea, a ship sends out a second waves and receives an echo after one second. If the velocity of sound in water is \(1500 m / s\), what is the depth of the sea

A. \(0.75 km\)
B. \(1.50 km\)
C. \(2.20 km\)
D. \(3.00 km\)
E. \(3.75 km\)

Question 1273:

What is the neutron in the Uranium isoptope \({ }_{92}^{218} X\) ?

A. 92
B. 146
C. 238
D. 330
E. 119

Question 1274:

A machine has a velocity ratio of 5 . If it requires a \(50 kg\) weight to overcome \(200 kg\) weight, the efficiency is ____________

A. \(4 \%\)
B. \(5 \%\)
C. \(40 \%\)
D. \(50 \%\)
E. \(80 \%\)

Question 1275:

If the force on a charge of \(0.2\) coulomb in an electric field is \(4 N\), then electric intensity of the field is ____________

A. \(0.8 \)N
B. \(0.8 N / C\)
C. \(20 .0 N / C\)
D. \(4.2 N / C\)
E. \(20.0 C / N\)