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^{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})

(g = 10ms

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} is

A

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

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