Physics in English Quiz 2

1.Centripetal force needed to keep the moon in its orbit round the Earth is provided by

A.Gravitational pull of Sun

B.Gravitational pull of Earth

C.Rotation about its own axis

D.None of these

2.Two teams are pulling a rope with equal and opposite forces each of 5 kN in a tug of war so that a condition of equilibrium exists. What will be the tensile force in the rope?

A.Zero

B.2.5 kN

C.5 kN

D.10 kN

3.A car travelling at a speed of 30 km per hour is brought to rest in 8 metres by applying brakes. If the same car is travelling at 60 km per hour, it can be brought to rest with the same breaking force at a distance of

A. 16 m

B.24 m

C.32 m

D.36 m

4.It is more difficult to walk on a sandy road than on a concrete road because

A.sand is soft and concreter is hard

B.the friction between sand and feet is less than that between concrete and feet

C.the friction between sand and feet is more than that between concrete and feet

D.the sand is grainy but concrete is smooth

5.A spring balance is pulled by 2 persons equally with 20 newton force on its two ends. Thus it will show a reading of

A.20 newtons

B. 40 newtons

C.zero

D.10 newtons

6.The Bowman’s capsule functions as a

A.filter

B.secretor

C.barrier

D.carrier

7.Which of the following is not a vector quantity?

A.Work

B.Force

C.Displacement

D.Velocity

8.What is the unit of electric resistance?

A.Dyne

B.Pascal

C.Joule

D.Ohms

9.Which of the following describes the path of Hailey’s comet ?

A.Circle

B.Parabola

C.Hyperbola

D.Ellipse

10.A solid cube of iron (specific gravity = 8) is melted into sheets. The side of the cube is 1 m. The sheets are used to make a hollow cube. This cube floats such that its whole volume is inside water. What should be the minimum length of side of such a cube?

A.2.0 m

B.2.5 m

C.2.75 m

D.3.0 m