COMMON PHYSICAL OBSERVATIONS (MCQs)

A piece of wood is floating in water. If we heat the water, the piece of wood will:

• (A) Sink a little
• (B) Increase in size
• (C) Rise a little
• (D) Float at the same level

If you float on your back on water, your weight will be:

• (A) Equal to your normal weight
• (B) Zero
• (C) Half of your normal weight
• (D) Less than the weight of water displaced by you

Where should be the center of gravity of a body?

• (A) It must be outside the body
• (B) Its changes its position from time to time
• (C) It must lie within the body
• (D) It may be near but not essentially within the body

As you go down into a well, your weight:

• (A) Increases slightly
• (B) Decreases slightly
• (C) Remains the same
• (D) Increases heavily

Existence on moon is not possible because of:

• (A) Absence of air
• (B) Low pressure
• (C) High pressure
• (D) Weak gravitational power

It is sometimes observed that if boiling water or milk is poured into glass tumbler, it cracks:

• (A) Gas being a bad conductor
• (B) Gas being easily heated
• (C) Boiling liquid exerting greater pressure
• (D) Glass being transparent in nature

Why you feel pain in your ears when aero-plane goes down?

• (A) Turbulence
• (B) No air pressure
• (C) Low air pressure
• (D) High air pressure

When a horse pulls a cart, the action is on the _______.

• (A) Cart
• (B) Earth
• (C) Horse
• (D) Earth and cart

Air is completely removed from an electric bulb prevent:

• (A) Cracking of the bulb
• (B) Oxidation of tungsten filament
• (C) Bursting of the bulb
• (D) Loss of light due to absorption

A boy jumps out of a moving bus. There is a danger for him to fall:

• (A) Towards the moving bus
• (B) In the direction of motion
• (C) Away from the bus
• (D) Opposite to the direction of motion