Physics Past Questions and Answers

The resistance of a 240V, 60 watt electric filament bulb is

A 0.25\(\Omega\)
B 480\(\Omega\)
C 60\(\Omega\)
D 240\(\Omega\)
E 960\(\Omega\)

Question 167:

An aircraft travelled from calabar to kano as follows: it flew first to ilorin convering a distance of 300km, 30o west of North, and then flew 400km, 60o East of North to kano. What is the resultant displacement?

A 567km
B 410km
C 594km
D 500km
E 600km

Question 168:

All of the following frequencies are overtones of 320 Hz EXCEPT

A 960Hz
B 640Hz
C 520Hz
D 1280Hz
E 1600Hz

Question 169:

The driver in a motor car, of which the total mass is 800kg and which is traveling at 20ms-1, suddenly observes a stationary dog in his path 50m ahead. If the car brakes can exert a force of 2000N, what will most likely happen?

A The car will be able to stop immediately the driver notices the dog
B The car will stop 3pm after hitting the dog
C The car will stop 20m in front of the dog
D The driver will quickly reverse the car
E The car will stop 5m beyound the dog

Question 170:

The absolute refractive indices of glass and water are \(\frac{3}{2}\) and \(\frac{4}{3}\) respectively. The refractive index at the interface when a ray travels from water to glass is

A \(\frac{1}{2}\)
B \(\frac{8}{9}\)
C \(\frac{9}{8}\)
D \(\frac{17}{12}\)
E 2