IGCSE Physics Pressure 1

What is the pressure at a depth of 500 m in water (density = 1000 kg/m³, g = 9.8 m/s²)?

• 500 kPa

• 4.9 MPa

• 245 kPa

• 0.49 MPa

A hydraulic press has an input piston with an area of 0.01 m² and an output piston with an area of 0.5 m². If a force of 200 N is applied to the input piston, what is the force on the output piston?

• 10,000 N

• 100 N

• 20,000 N

• 1,000 N

In a sealed container with gas, if the temperature of the gas is doubled (in Kelvin), what happens to the pressure?

• It doubles

• It halves

• It increases by a factor of four

• It remains unchanged

Which of the following gases would exert the greatest pressure at the same temperature and volume?

• Oxygen

• Hydrogen

• Nitrogen

• Carbon dioxide

What is the relationship between pressure and volume in a gas at constant temperature (Boyle’s Law)?

• Pressure is directly proportional to volume

• Pressure is inversely proportional to volume

• Pressure is independent of volume

• Pressure increases with volume

A diver descends to a depth where the pressure is 3 times atmospheric pressure. What is the absolute pressure at this depth? (Assume atmospheric pressure is 101 kPa)

• 303 kPa

• 404 kPa

• 505 kPa

• 606 kPa

If the volume of an ideal gas is reduced by half while keeping the temperature constant, what happens to its pressure?

• Doubles

• Halves

• Quadruples

• Stays the same

How much pressure does a force of 500 N exert on an area of 0.02 m²?

• 25,000 Pa

• 250 Pa

• 10,000 Pa

• 50,000 Pa

Which of the following statements is true about pressure in a fluid?

• It increases in all directions

• It only increases upwards

• It remains constant

• It decreases with depth

The pressure inside a gas cylinder is 400 kPa. If 25% of the gas is released, assuming constant temperature, what is the new pressure inside the cylinder?

• 100 kPa

• 300 kPa

• 200 kPa

• 400 kPa