
N level Sci Physics 2024
Quiz by Yan Bin Chow
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Which statement contains an error in the unit?
Which row gives the correct order of magnitude for the size of the objects shown?

A ruler is placed vertically on a bench to measure the height of an arrow above the bench.

Bats sense the distance to surrounding objects by emitting high frequency sound and detecting the sound reflected back from the objects.
The time between emitting a sound and detecting the sound reflected back from a wall is 0.020 s.
How far is the wall from the bat?
(The speed of sound in air is 340m/s.)
Which expression describes the mass of the human body?
A student wants to calculate a pressure in pascal; 1 pascal (Pa) = 1 N/m2 . He calculates the answer using a force given in N and an area given in mm2 .
What is the correct unit for his answer?
A car moves along a road at constant speed.

The diagram shows all the forces acting on a firework of mass 0.20 kg when it is launched vertically from the surface of the Earth.

A man pushes a box across a horizontal floor with a constant horizontal force of 20 N. It takes 12 s to move the box 25 m. Friction can be assumed to be negligible.
What is the power transferred by the man to push the box?
Which statement describes the particles in a solid?
Ice at 0°C is placed in warm water. The ice melts.
Which statement is correct?
The heating element of a metal electric kettle is switched on.
Hands placed near the electric kettle feel warm as thermal energy is transferred from the kettle.

Which row describes sound waves?

Which property is the same for all electromagnetic waves travelling in a vacuum?
Which unit is electric charge measured in?
How can the potential difference across a running electric motor be calculated?


A desk lamp should have a 3A fuse fitted, but a 13A fuse has been fitted by mistake.
The lamp is not faulty.
The lamp is switched on.
What happens?
A radioactive isotope has a half-life of 4.5 days. A sample of the radioactive isotope is monitored.
Which statement about the sample after 9.0 days is correct?