# 1995 - WAEC Physics Past Questions and Answers - page 1

1

Which of the following is a fundamental quantity?

A

Heat capacity

B

Electric current

C

Torque

D

Reactance

**correct option:**b

2

A boy cycles continuously through a distance of 1.0 km in 5 minutes. Calculate his average speed

A

0.3ms

^{-1}B

3.3ms

^{-1}C

16.6ms

^{-1}D

20.0ms

^{-1}**correct option:**b

3

A student found out from a simple pendulum experiment that 20 oscillations were completed in 38 seconds. What is the period of oscillation of the pendulum?

A

8.0s

B

3.8 s

C

2.0 s

D

1.9 s

**correct option:**d

4

A body of mass 7.5 kg is to be pulled up along a plane which is inclined at 30

(g = 10ms

^{o}to the horizontal. If the efficiency of the plane is 75%, what is the minimum force required to pull the body up the plane?(g = 10ms

^{-1})A

5.0 N

B

20.0 N

C

50.0 N

D

75.0 N

**correct option:**c

5

The angular speed of an object describing a circle of radius 4m with a linear constant speed of 10 ms

^{-1}isA

40.00 rad s

^{-1}B

14.00 rad s

^{-1}C

2.50 rad s

^{-1}D

1.58 rad s

^{-1}**correct option:**c

6

At what angle to the horizontal must the nozzle of a machine gun be kept when firing to obtain a maximum horizontal range for the bullets?

A

0.0

^{o}B

22.5

^{o}C

30.0

^{o}D

45. 0

^{o}**correct option:**d

7

Which of the following will reduce the frequency of oscillation of a simple pendulum?

A

Increasing the mass of the bob

B

Decreasing the mass of the bob

C

Increasing the length of the string

D

Decreasing the length of the string

**correct option:**c

8

A car travelling at a uniform speed of 120km h

^{-1}passes two stations in 4 minutes. Calculate the distance between the two stations.A

8km

B

15km

C

22km

D

30km

**correct option:**a

9

A machine has an efficiency of 60%. If the machine is required to overcome a load of 30 N with a force of 20 N calculate its mechanical advantage?

A

0.7

B

0.9

C

1.5

D

2.5

**correct option:**c

10

A body weighing 10 N in air is partially immersed in water. It displaces water of mass 0.3 kg. What is the upthrust on the body? (g = 10 ms

^{-2})A

13.0 N

B

7.0 N

C

3.3N

D

3.0N

**correct option:**d