set 2 MCQ Questions & Answers Detailed Explanation

Question : 1

The lift in an aeroplane is based on

a) Theorem of continuity

b) Law of gravitation

c) Pascal’s low

d) Bernoulli’s theorem

Question : 2

Kerosene oil rises up in a wick of a lantern because of

a) surface tension

b) diffusion of the oil through the wick

c) buoyant force of air

d) the gravitational pull of the wick

Question : 3

Surface tension of a liquid is due to

a) electrical force between molecules

b) gravitational force between molecules

c) adhesive force between molecules

d) cohesive force between molecules

Question : 4

The most important property of nanomaterial is

a) Friction

b) Pressure

c) Force

d) Temperature

Question : 5

Four wires of same material and dimensions as mentioned below are stretched by a load of same magnitude separately. Which one of them will be elongated maximum?

a) Wire of 2 m length and 2 mm diameter

b) Wire of 3 m length and 1.5 mm diameter

c) Wire of 1 m length and 2 mm diameter

d) Wire of 1 m length and 1 mm diameter

Question : 6

At which temperature density of water is maximum?

a) 0°C

b) – 4°C

c) 4°C

d) – 8°C