A-Level Physics Quiz

In a 2D collision, if the initial vertical momentum is zero, what must be true about the vertical components of momentum after the collision?

• They must be opposite.

• They must be equal.

• They must both be zero.

• They must be equal and opposite.

According to Newton's third law, if the Earth exerts a gravitational force on an object, what does the object do?

• Exerts a larger force on the Earth.

• Exerts no force on the Earth.

• Exerts an equal and opposite force on the Earth.

• Exerts a smaller force on the Earth.

What is the purpose of using the diffraction grating equation in physics?

• To measure the mass of particles.

• To calculate the speed of light.

• To find the line separation and wavelength changes.

• To determine the angle of refraction.

How is the mass of air hitting a tent calculated?

• By calculating the area of the tent.

• By measuring the force exerted.

• By using the density and volume of air.

• By multiplying speed by time.

What is the correct conversion of 250 cm³ to m³?

• 250 * 10^-9 m³

• 250 * 10^-3 m³

• 250 * 10^-6 m³

• 250 * 10^-2 m³

If the half-life of a substance is T, how many nuclei remain after 4T?

• 1/4 of the original amount

• 1/2 of the original amount

• 1/8 of the original amount

• 1/16 of the original amount

In beta decay, what does the varying energy of beta particles suggest?

• The presence of a constant energy source.

• The existence of another particle.

• The decay is incomplete.

• The energy is lost as heat.

According to Snell's law, what happens when light passes from a medium with refractive index N1 to N2, where N2 > N1?

• The light speed remains constant.

• The light speed increases.

• The light bends towards the normal.

• The light bends away from the normal.

In a potential divider circuit, what happens to the voltage across a resistor if its resistance decreases?

• The voltage becomes zero.

• The voltage increases.

• The voltage decreases.

• The voltage remains the same.

What is a common mistake when applying equations in physics problems?

• Forgetting to convert units.

• Ignoring air resistance.

• Assuming constant acceleration when it is not.

• Using the wrong units.