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ASSIGNMENTS
MCQ(BOARD)

1. Hydrometer is used to determine the

a) humidity.
b) atmospheric pressure.
c) purity of water.
d) density of liquids.

2. A body weighs 500 g in air and 250 g in water. The upthrust on the body is
a) 100 g.
b) 150 g.
c) 250 g.
d) 750 g.

3. A body of weight 44 kg is floating in water. The apparent weight of the body in
water is
1. 44 kg.
2. 1/44 kg.
3. 440 kg.
4. zero.
4. If we float with our back on water, our weight is

1. zero.
2. equal to our normal weight.
3. half our normal weight.
4. greater than the weight of water we displace.

5. An object floats in water
1. if the buoyant force of water is not greater than the weight of the object itself.
2. if the density of the object is not less than the density of water.
3. if the buoyant force acts in downward direction on the object.
4. if the buoyant force of water is greater than the weight of the object itself.

6. Upthrust is independent of the

1. density of the body submerged in the liquid.
2. density of the liquid.

3. volume of displaced liquid.

4. volume of the body submerged in the liquid.
7. Upthrust is given by

1. V x d x g.

2. V x h x g.

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