Cambridge IGCSE Physics - 0625 - Core Paper 1 2020 Winter Zone 2

A student measures the volumes of three liquids using three different measuring cylinders.

The table shows the volumes recorded by the student.
[Table_1]
Which readings are correctly recorded?

A car driver measures the time taken to complete four separate journeys. In which journey does the driver have the greatest average speed?
[Table_1]

The graph shows how the speed of an object varies with time.

Which row describes the motion of the object at times P and Q?

A stone has a weight of 4.1 N.
What is the mass of the stone?

Which quantity is weight an example of?

A rectangular metal block is 20 cm long. The cross-sectional area of the block is 25 cm². The mass of the block is 4000 g. What is the density of the metal?

A force of 4.0 N acts on a beam as shown.
The line of action of the force is a distance x from a pivot. The moment of this force about this pivot is 8.0 N cm.
What is distance x?

The diagram shows a stand. The stand holds a heavy mass above the bench.
Which two changes would definitely make the stand more stable?

Two wind farms supply electrical energy to consumers in different ways.

Wind farm 1 supplies energy directly to consumers and for every 1000 J of energy extracted from the wind, 360 J is transferred to consumers as electrical energy.

Wind farm 2 stores electrical energy in batteries and then supplies energy from the batteries to the consumer. For every 1000 J of energy extracted from the wind, 270 J is transferred to consumers as electrical energy.

Which statement about the two wind farms is correct?

Work is done.
Which physical quantity is transferred?

To calculate the power produced by a force, the size of the force must be known.
What else needs to be known to calculate the power?
[Table_1] the distance that the force moves the object | the time for which the force acts on the object

The diagram shows a mercury barometer.
Which height is used as a measurement of atmospheric pressure?

A man who weighs 540 N stands with both feet on the ground. The area of contact between one foot and the ground is 0.015 m^2. What is the pressure exerted on the floor by the man?

On a warm day, a driver checks the air pressure in a car tyre. At night, the temperature drops and the air pressure in the tyre decreases. There are no air leaks in the tyre.
Why does the pressure decrease?

Wet clothes are put out on a line to allow the water in the clothes to evaporate. Which type of weather would cause the water to evaporate most quickly?

A bimetallic strip is used to control the temperature of electrical appliances. It is made of two different metals fixed together.
The diagram shows the shape of the bimetallic strip before and after heating.

Which statement is correct?

Samples of four different substances are heated in turn by the same heater, for the same time duration and in the same conditions. The increase in temperature for each sample is recorded in the table.
Which sample has the highest thermal capacity?
[Table: sample and temperature rise/°C]
A. aluminium - 6.0
B. copper - 8.0
C. mercury - 10.0
D. water - 5.0

Thermal energy is supplied at the same rate to four bars made from different materials.

After several minutes, there is a temperature difference between X and Y for each bar.
Which statement identifies the bar with the greatest temperature difference between points X and Y, and gives the correct reason?

A scientist measures the air temperature at different heights from the floor in a cave. The results are recorded in the table.
[Table_1]
Why does altering the height affect the temperature of the air?

Which row correctly describes light waves?
[Table_1]
wave type: longitudinal, direction of vibrations: parallel to direction of wave travel
wave type: longitudinal, direction of vibrations: perpendicular to direction of wave travel
wave type: transverse, direction of vibrations: parallel to direction of wave travel
wave type: transverse, direction of vibrations: perpendicular to direction of wave travel

Waves travel across the surface of water.
What is meant by the amplitude of the wave?

Which diagram shows the image correctly formed by reflection?

A man sees a stone at the bottom of a pool of water. Which path could be taken by light from the stone to the man?

White light can be split into different colours by passing it through a prism.
What is the name of this process?

Which type of radiation does a remote controller use to send its instructions to a TV set?

A police car with its siren sounding is stationary in heavy traffic. A pedestrian notices that, although the loudness of the sound produced does not change, the pitch varies.
Which row describes the amplitude and the frequency of the sound?
[Table_1]

A student sets up four experiments using bar magnets and other metal objects. The N and S poles of the bar magnets are labelled N and S.



Which pairs attract each other?

A student uses three small plotting compasses to investigate the magnetic field around a bar magnet. Which diagram shows the directions in which the compass needles point?

A polythene rod is charged negatively by rubbing it with a cloth. Which statement explains why the rod has become charged?

There is a current in a variable resistor when a potential difference (p.d.) is applied across it. In which situation is the current increased?

The circuit shown includes a battery, three lamps X, Y and Z and three switches S_1, S_2 and S_3.

Lamp X is off but lamps Y and Z are lit.
Which switches are closed?

A student uses four ammeters P, Q, R and S to measure the current in different parts of the circuit shown.

Which two ammeters read the largest current?

An electrical appliance is powered from a mains supply.
The appliance normally uses a current of 3A, but the current briefly rises to 4A at the instant the appliance is switched on. The cable to the appliance is designed for currents up to 6A.
A fuse is used to protect the circuit.
What should be the rating of the fuse?

A student investigates electromagnetic induction. She moves the N pole of a magnet quickly towards a coil of wire. There is a reading on the galvanometer.
What can she do to get a greater reading on the galvanometer?

A transformer is needed to convert a supply of 240 V a.c. into 4800 V a.c.

Which pair of coils would be suitable for this transformer?
[Table_1]

The diagram shows a wire carrying a current in the direction shown. The wire is between the poles of a magnet. A force is produced on the wire out of the page.  The wire and magnet are now put into different arrangements X, Y, and Z. The arrow shows the direction of the current in each case.  In which arrangements is the force on the wire out of the page?

Which statement is correct for the nucleus of any atom?

The symbol represents a nucleus of zinc. \[^{68}_{30}Zn\]
Which row gives the numbers of protons and neutrons in this nucleus?[Table_1]

Three types of radiation are $\alpha$-radiation, $\beta$-radiation and $\gamma$-radiation.
Which statement is correct?

The graph shows the radioactive decay curve of a substance.



What is the half-life of this substance?