Kuiz Fizik Tingkatan 5 Bab 2 Set 1

SELAMAT DATANG Kuiz Fizik Tingkatan 5 Bab 2 Set 1

KUIZ INI MENGANDUNGI 10 SOALAN

A U-tube manometer is connected to a gas tank. The liquid in the manometer is pushed down on the gas tank side and is 40 cm higher on the side open to the atmosphere. What can be concluded about the gas pressure?

The gas pressure is less than the atmospheric pressure

The gas pressure is greater than the atmospheric pressure.

The gas pressure is equal to the pressure exerted by the 40 cm liquid column.

The gas pressure is equal to the atmospheric pressure.

None

Why does atmospheric pressure decrease as altitude increases?

There is a shorter and less dense column of air above, which exerts less weight.

The force of gravity becomes significantly weaker at higher altitudes.

The air gets colder at higher altitudes, causing it to contract and exert less pressure.

The percentage of oxygen in the air decreases with altitude.

None

In a hydraulic jack, a force of 200 N is applied to an input piston with a cross-sectional area of 0.02 m2. If the output piston has a cross-sectional area of 0.8 m2, what is the maximum load (force) that the jack can lift?

4000 N

200 N

5 N

8000 N

None

A dam is constructed to be much thicker at its base than at its top. What is the primary physical principle that explains this design choice?

Atmospheric pressure combined with water pressure is greatest at the bottom.

Liquid pressure is directly proportional to depth, so the force exerted by the water is greatest at the base.

The density of water increases with depth, requiring stronger support.

The total volume of water in the reservoir determines the force on the dam wall.

None

An object with a weight of 20 N is fully submerged in a fluid. If the buoyant force acting on it is 25 N, what will be the subsequent motion of the object when released?

It will remain suspended at its current depth.

It will accelerate upwards towards the surface

It will move upwards at a constant velocity.

It will sink to the bottom.

None

Deep-sea submersibles are built with thick, rounded hulls, typically made of steel or titanium. This design is primarily to withstand…

the buoyant force pushing the submersible to the surface.

the extremely low temperatures found at the bottom of the ocean.

the high internal pressure required to keep the crew alive.

the extremely high external pressure of the deep ocean.

None

When a submarine takes on water into its ballast tanks, what is the effect on the forces acting on it?

The buoyant force increases because the submarine’s volume has increased.

Its total weight increases, causing it to become greater than the buoyant force, so it sinks.

The buoyant force decreases because the submarine becomes heavier.

Its total weight decreases, allowing it to sink faster.

None

A siphon is used to move water from one bucket to another at a lower level. The flow will stop if…

the bend at the top of the siphon is perfectly horizontal

both buckets are placed in a vacuum.

the diameter of the tube is too large

None

How does the aerofoil shape of an airplane wing generate lift according to Bernoulli's principle?

Air travels slower over the curved top surface, creating a region of higher pressure that pushes the wing up.

The engines create a vacuum above the wings which pulls the aircraft into the air.

Air travels faster over the curved top surface, creating a region of lower pressure compared to the bottom surface.

The wing pushes air downwards, resulting in an equal and opposite reaction force pushing the wing upwards.

None

10.

A diver is at a depth of 30 m in a freshwater lake. What is the approximate gauge pressure they experience? (Use density of fresh water ρ=1000 kg m−3 and g=9.8 m s−2).

101 kPa

394 kPa

294 kPa

29.4 kPa

None

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