It' i's revision time, take Physics

0.000 s

It' i's revision time, take Physics - GCE O-level 2024

46/46 MCQs for:

GCE O-level 2024

A physical quantity is defined as:

any measurement that is done in physics.

any measurable property of man.

any object that takes part only in physical activities.

any object that exists physically.

Which of the following pairs consists of one vector and one scalar quantity?

Velocity and momentum.

Energy and power.

Force and distance.

Moment and force.

Which of the following affects the force between two charged bodies?

Speed of the bodies.

Weight of the bodies.

Mass of the bodies.

Distance between the bodies.

The change in momentum of a body is the same as:

turning effect of the force.

change in inertia.

impulse of a body.

change in motion.

A machine is a system that multiplies:

power applied.

force applied.

energy applied.

pressure applied.

An object has a weight of 100 N on the earth's surface. Its weight on a planet with acceleration due to gravity of 1.6 m/s is:

10 N.

16 N.

62.5.

160 N.

A body travelling with a velocity of 5 m/s accelerates at 2 m/s² to attain a velocity of 11 m/s. The time taken for this change of velocity to take place is:

3 s.

0.33 s.

8 s.

12 s.

The density of iron decreases when it is heated because its:

Mass increcreases.

volume increases.

mass decreases.

volume decreases.

The law ‘the extension of an elastic material is directly proportional to the applied force provided the elastic limit is not exceeded’ is:

Hooke's law.

Ohm's law.

Newton's first law.

Faraday's law.

The phenomenon where a body is made to vibrate at its natural frequency due to another body vibrating with that same frequency is:

diffraction.

Interference.

Resonance.

Refraction.

The formation of a new atom after decay process is known as:

absorption.

transmutation.

Ionisation.

transformation.

Which of the graphs in the figure shows pressure, P, of an object in a liquid changes with depth, h?

A fish at the bottom of a pond appears to be nearer to the surface because of the phenomenon of:

refraction.

reflection.

interference.

diffraction.

The tracks of alpha particles are thick and straight because:

The particles are positively charged.

The particles are massive and highly ionising.

The particles are helium nuclei.

The particles travel very fast.

The unit of power is:

N/s.

Ns.

J/s.

Js.

A block of mass 3 kg, lying on a platform has a potential energy of 240 J. What is the height of the platform?

80 m.

24 m.

72 m.

8 m.

Identify who from the list below is doing work.

A girl playing and running up and down a staircase.

A woman sitting on a chair and carrying a child.

A man sitting in his office and reading a book.

A boy standing in front of a class and carrying a bag of cement.

Eggs float in salt water but sink in fresh water because:

all solids float in saltwater.

salt water contains impurities, while fresh water does not.

salt water is denser than fresh water.

fresh water is denser than salt water.

Passengers getting out of a car that has been moving for a while sometimes get electric shocks because;.

The passengers in the car get charged as they rub against each other when the car is moving.

Charges due to friction with air molecules are deposited on the surface of the car as it moves.

Charged air molecules are deposited on the surface of the car as it moves.

The car battery causes charges to build up on the surface of the car.

A small electric oven with a power rating of 1000 W, 220 V would require a fuse of:

1 A.

5 A.

7 A.

0.5 A.

A virtual image is an image that:

is inverted.

is bigger than the object.

cannot be formed on a screen.

can be formed on a screen.

When the speed of light reduces as it passes from one medium to another, the path of the light:

Bends towards the normal.

Curves away from the normal.

Bends away from the normal.

Curves towards the normal.

Identify which of the graphs in the figure that shows how the temperature, θ, of water during boiling as it varies with the time, t, of heating.

Which of the following is NOT an advantage of parallel connection of bulbs?

A fuse can be used to protect all the bulbs.

One bulb can be switched on while the others are off.

The bulbs shine brighter.

The bulbs are at the same potential difference.

The heat energy needed to change the temperature of a unit mass of a substance by one unit is called:

latent heat.

heat capacity.

specific heat capacity.

specific latent heat.

Which of the following factors affect the force between two charged bodies?

Mass of the bodies.

Weight of the bodies.

Volume of the bodies.

Distance between the bodies.

Isotopes of an element differ in terms of the number of:

neutrons.

electrons.

protons.

ions.

The figure shows three resistors connected in an electric circuit. The combined resistance. of the resistors is:

[ (R3/R1) + R2].

[ (R1 + R3) / R1R3 ] + R2.

[ R1R3 / (R1 + R3)] + R2.

[ (R1/R3) + R2].

The right-hand-grip rule is used in the case of a coil to determine:

The polarity of the magnet produced.

The duration of the force produced.

the direction of current flow.

The motion of the magnetic field.

The heat energy required to change a unit mass of ice from when it just starts melting until all turns to liquid is:

The specific latent heat of fusion of water.

the heat capacity of the water.

the latent heat of fusion of water.

the specific heat capacity of water.

When a cup of tea is stirred with a stainless steel spoon, the heat transfer processes involved are:

Conduction and convection only.

Convection and radiation only.

Conduction and radiation only.

Conduction, convection and radiation.

When a polythene rod is rubbed with a dry woollen cloth, the cloth gives off electrons to the rod and becomes positively charged while the rod becomes negatively charged. The reason for this transfer of electrons is that:

the woollen cloth has more electrons than the polythene rod.

in the woollen cloth, the electron are more weakly held to the nucleus.

the polythene rod has more electrons than the woollen cloth.

in the polythene rod, the electrons are more weakly held to the nucleus.

One of the uses of hard magnetic material is:

to produce electromagnets.

to produce magnetic fields.

to produce transformers.

to produce permanent magnets.

A virtual image is an image that:

can be formed on a screen.

That cannot be formed on a screen.

is formed on the opposite side of lens.

is bigger than the object.

Which graph in the figure best represents the velocity-time graph for a stone that is dropped from a height?

A trolley of mass 500 g is accelerated at 10 m/s². The force that produced the acceleration is:

500 N.

5000 N.

5 N.

50 N.

When two person sleep under the blanket, they feel hot because:

The blanket prevent heat from leaving their bodies.

The blanket traps the heat they produce.

The blanket supplies heat to them.

The blanket absorbs cold from them.

The principle of conservation of linear momentum states that:

the sum of initial momentum is equal to the sum of final momentum.

the total final momentum of system is constant.

the total initial momentum of a system is constant.

The total momentum of a closed system is constant.

When a car is moving with constant velocity:

its acceleration increase uniformly.

its net force is constant.

its net force is zero.

its acceleration is constant.

A radioactive atom ¹²⁴₅₆Y decays to ¹²⁰₅₄X + Z by emitting a particle z as shown in the equation.

The particle Z is:

gamma.

Alpha.

neutron.

Beta.

When an intrinsic semiconductor is heated, its conductivity:

Remains the same.

Increases.

decreases.

decreases and then remain constant.

An object is placed 20 cm in front of a converging lens of focal length 20 cm. The image formed will be:

20 cm in front of the lens.

At infinity.

40 cm behind the lens.

20 cm behind the lens.

The figure is a diagram that was used to investigate the variation of fundamental frequency with the length of a vibrating string.

Which of the following quantities is kept constant during the exercise?

Amplitude.

Mass.

Wave.

Tension.

The figure is a diagram that was used to investigate the variation of fundamental frequency with the length of a vibrating string.

The paper rider is thrown off when:

the paper rider is vibrating at the frequency as the tuning fork.

when the natural frequency of the string is different from that of the tuning fork.

the string is vibrating at the same frequency as the tuning fork.

when the string produces a node were the paper rider is.

The figure is a diagram that was used to investigate the variation of fundamental frequency with the length of a vibrating string.

An important instrument not included in the diagram is a:

Stop watch.

Clapper.

Balance.

Metre rule.

The figure is a diagram that was used to investigate the variation of fundamental frequency with the length of a vibrating string.

The relationship between frequency and length of a vibrating string is given as:

f ∝ 1/ l.

f ∝ l.

f ∝ 1/ l².

f ∝ l².