Atmospheric Pressure

Q.

Why does a helium balloon burst when it rises too high up?

1. The pressure inside the balloon is more than outside pressure

2. None of these

3. The pressure inside the balloon is less than outside pressure

4. The pressure inside the balloon is equal to the outside pressure

Q.

The pressure applied by the air which is present above us is called as ___.

Q.

Identify the high pressure and the low pressure region.

Q. When we press the bulb of a dropper with its nozzle kept in water, air in the dropper is seen to escape in the form of bubbles. Once we release the pressure on the bulb, water gets filled in the dropper. What is the reason behind the rise of water in the dropper?

Q. <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> A liquid exerts pressure on the walls of its container.

1. False
2. True

Q.

A column of air extending up to the height of atmosphere and base of area 10 cm $\times$ 10 cm was kept above a boy's head. Why didn't he get crushed?

1. The pressure inside our body is also equal to the atmospheric pressure and they cancel each other out.

2. The pressure inside our body is unequal to the atmospheric pressure.

3. The above statement is incorrect.

4. Can't be said.

Q.

Which of the following options is correct?

1. Atmospheric pressure increases with increase in altitude

2. Atmospheric pressure remains constant with increase or decrease in altitude

3. Atmospheric pressure does not depend on altitude

4. Atmospheric pressure decreases with increase in altitude

Q. We are not crushed under atmospheric pressure because the pressure inside the human body is the atmospheric pressure.

1. lesser than
2. higher than
3. equal to

Q. How do we sip liquids using a straw?

Q.

Pick out the options which work on the same working principle as that of the given device.

1. An aeroplane

2. A straw

3. An ink dropper

4. A syringe

Q.

The burning of fossil fuels creates a low pressure region. Pick out the correct options regarding this.

1. As temperature increases, pressure decreases

2. As temperature increases, pressure increases

3. As temperature increases, molecules start moving and air expands

4. As temperature increases, molecules comes closer to each other

Q.

A rubber sucker as shown above, when pressed on a surface sticks to it, because:

1. The suckers have a very strong adhesive force.

2. Atmospheric pressure is less than the internal pressure.

3. A partial vacuum is created on pressing the rubber sucker.

4. Atmospheric pressure acts on it externally.

Q. The pressure exerted by the air which is present above us is called:

1. absolute pressure
2. atmospheric pressure
3. gauge pressure
4. fluid pressure

Q. The atmospheric pressure at a place can be measured using:

1. Glue
2. Mercury
3. Gallium
4. Water

Q.

When we press the bulb of a dropper with its nozzle kept in water, the air in the dropper escapes in the form of bubbles. Once we release the pressure on the bulb, water gets filled in the dropper. The rise of water in the dropper is driven by:

1. Pressure of water

2. Shape of rubber bulb

3. Gravity of the earth

4. Atmospheric pressure