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Question (11)

QN002181

Which statement about atmospheric pressure is correct?

(A) It acts only downward
(B) It acts only upward
(C) It acts in all directions
(D) It acts only on liquids

Correct Answer: C

Explanation:

Atmospheric pressure acts in all directions.

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Question (12)

QN002182

In the sucker activity, the sucker sticks to the surface because:

(A) Pressure inside the sucker becomes greater
(B) Atmospheric pressure outside is greater
(C) Friction alone holds it
(D) Gravity pulls it upward

Correct Answer: B

Explanation:

Higher outside air pressure presses the sucker.

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Question (13)

QN002183

When air is removed from inside a rubber sucker, the pressure inside it:

(A) Increases
(B) Remains same
(C) Decreases
(D) Becomes equal to outside pressure

Correct Answer: C

Explanation:

Removing air lowers the internal pressure.

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Question (14)

QN002184

A force of 900 N acts over an area of 3 m² due to atmospheric pressure. Find the pressure.

(A) 100 Pa
(B) 200 Pa
(C) 300 Pa
(D) 2700 Pa

Correct Answer: C

Explanation:

Pressure = 900 ÷ 3 = 300 Pa

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Question (15)

QN002185

The practical unit commonly used for air pressure is:

(A) Joule
(B) Millibar
(C) Newton
(D) Watt

Correct Answer: B

Explanation:

Millibar is a practical unit of air pressure.

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Question (16)

QN002186

One millibar is equal to:

(A) 1 Pa
(B) 10 Pa
(C) 100 Pa
(D) 1000 Pa

Correct Answer: C

Explanation:

1 millibar = 100 Pa.

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Question (17)

QN002187

Hectopascal (hPa) is equal to:

(A) 10 Pa
(B) 50 Pa
(C) 100 Pa
(D) 1000 Pa

Correct Answer: C

Explanation:

1 hPa = 100 Pa.

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Question (18)

QN002188

A sheet experiences a force of 800 N due to atmospheric pressure over an area of 20 m². What pressure acts on the sheet?

(A) 20 Pa
(B) 40 Pa
(C) 80 Pa
(D) 16000 Pa

Correct Answer: B

Explanation:

Pressure = 800 ÷ 20 = 40 Pa

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Question (19)

QN002189

Air escapes from a punctured bicycle tube because:

(A) Air moves from low pressure to high pressure
(B) Air moves from high pressure to low pressure
(C) Gravity pushes the air out
(D) Rubber attracts air

Correct Answer: B

Explanation:

Air flows from high pressure to low pressure.

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Question (20)

QN002190

Two balloons are connected by a straw. One balloon is inflated while the other is empty. Air flows toward the empty balloon because:

(A) Empty balloon has greater pressure
(B) Inflated balloon has greater pressure
(C) Both balloons have equal pressure
(D) Air has no pressure

Correct Answer: B

Explanation:

Air moves from higher pressure to lower pressure.

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Question (11)

Which statement about atmospheric pressure is correct?

Explanation:

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Question (12)

In the sucker activity, the sucker sticks to the surface because:

Explanation:

Link:

Question (13)

When air is removed from inside a rubber sucker, the pressure inside it:

Explanation:

Link:

Question (14)

A force of 900 N acts over an area of 3 m² due to atmospheric pressure. Find the pressure.

Explanation:

Link:

Question (15)

The practical unit commonly used for air pressure is:

Explanation:

Link:

Question (16)

One millibar is equal to:

Explanation:

Link:

Question (17)

Hectopascal (hPa) is equal to:

Explanation:

Link:

Question (18)

A sheet experiences a force of 800 N due to atmospheric pressure over an area of 20 m². What pressure acts on the sheet?

Explanation:

Link:

Question (19)

Air escapes from a punctured bicycle tube because:

Explanation:

Link:

Question (20)

Two balloons are connected by a straw. One balloon is inflated while the other is empty. Air flows toward the empty balloon because:

Explanation:

Link:

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