Cambridge IGCSE Physics - 0625 - Core Paper 1 2019 Winter Zone 3

A student uses a ruler to find the volume of water in a tank. She measures the lengths EF and FG.



What other length does she need to measure?

An object begins to fall close to the Earth's surface. Air resistance can be ignored. Which statement about the object's acceleration is correct?

A car travels at an average speed of 60 km/h for 15 minutes.
How far does the car travel in 15 minutes?

Which equation shows the relationship between the weight $W$ and the mass $m$ of an object?

Four hollow glass spheres P, Q, R and S each have a mass of 72 g.
Their volumes are given in the table.

[Table_1]

Which spheres sink in a liquid of density $0.9\,\text{g/cm}^3$?

A student measures the length of a spring. She then attaches different weights to the spring. She measures the length of the spring for each weight.
The table shows her results.

[Table_1]

What is the extension of the spring with a weight of 3.0 N attached to it?

The diagram shows a uniform metre rule. The rule is pivoted at its mid-point. A downward force of 4.0 N acts on the rule at the 5 cm mark. The rule is held by a string at the 30 cm mark. The rule is in equilibrium.
What is the upward force that the string exerts on the rule?

The diagrams represent the only two forces acting on an object.
Which object could be moving to the right at constant speed?

Brakes are used to slow down a moving car.
Into which form of energy is most of the kinetic energy converted as the car slows down?

Three situations are listed.
1. someone blowing air into a party balloon
2. a crane lifting a block of concrete
3. a pile of books at rest on a shelf
In which situations is work being done?

A boy lifts a brick from the ground and places it at rest on a higher shelf. He does 30 J of work against gravity.
Which row correctly describes the final energies of the brick?
[Table_1]

A drawing pin (thumb tack) has a sharp point at one end and a flat surface at the other end.
The pin is pushed into a wooden board.
How do the pressure and the force at the sharp point compare with the pressure and the force on the flat surface?

Pressure is related to force and area.
Which situation cannot be explained using this relationship?

Which row compares the separation and the motion of the molecules of a hot gas with those of a cool liquid? (Both the gas and the liquid are at the same pressure.)
[Table_1]

A fixed mass of gas is trapped in a container. The temperature of the gas is increased but the volume of the gas is kept constant.

How does this change affect the kinetic energy of the molecules and the pressure on the walls of the container?

The diagram shows a liquid-in-glass thermometer.
When the temperature of the thermometer rises, the changes produced cause the liquid thread to move to the right.
Why does this happen when the temperature of the thermometer rises?

A liquid-in-glass thermometer has a range from −10°C to 110°C.
What are the fixed point temperatures used when calibrating this thermometer in °C?

The diagram shows four labelled changes of state between solid, liquid and gas.

Which changes need an energy input?

A beaker contains some cold water. A purple crystal is placed on the bottom of the beaker. The beaker is gently heated beneath the crystal. The crystal dissolves in the water. The colour spreads, as shown in the diagram.
Three students each make a statement about the experiment.
Student 1 says the purple water is less dense than the rest of the water.
Student 2 says the purple water is warmer than the rest of the water.
Student 3 says all of the water will eventually get heated, even though water is a poor conductor of thermal energy.
Which students are correct?

Why are the outside walls of houses often painted white in very hot countries?

Which type of wave is not an example of a transverse wave?

Plane water waves approach a narrow gap in a barrier.
Which diagram shows the diffraction pattern that would occur?

A person stands 1.0 m in front of a plane mirror. The mirror is moved away from the person at a speed of 1.0 m/s. Which statement is correct?

Which diagram shows total internal reflection of light by a glass prism?

The diagram shows the electromagnetic spectrum.

A word is missing from the label below the spectrum.
Which word is missing?

A man hears a starting pistol fire 1.5 seconds after he sees a puff of smoke from the pistol. The sound and the smoke are made at the same time. The starting pistol is 450 metres away from the man.
What is the speed of sound calculated from this observation?

The diagram represents a magnetic field. The field increases in strength from left to right.

A small compass is placed at P. Which way will the compass needle point?

Two soft-iron rods are placed end-to-end inside a coil. The coil is connected to a battery.
The connections from the battery to the coil are now reversed.
What happens to the soft-iron rods in each case?
[Table_1]

A plastic rod is rubbed with a dry cloth. The rod becomes positively charged.
Why has the rod become positively charged?

A resistor is connected to a battery. There is a current in the resistor. What is the main energy change?

Lamps X and Y are designed to operate at normal brightness when each are connected to a 3.0 V supply. Lamp Z is designed to operate at normal brightness when connected to a 6.0 V supply. In which circuit do all three lamps operate at normal brightness?

Identical resistors are connected together to form arrangements X, Y and Z.
What is the correct order of the resistances of the arrangements from the largest to the smallest?

Which circuit shows a variable resistor used to control the brightness of a lamp?

Where must a fuse be connected in a mains electric circuit?

A step-up transformer produces a 60 V a.c. output from a 12 V a.c. input.
There are 50 turns on the secondary coil.
How many turns are there on the primary coil?

A student uses a balance, a magnet and a power supply to determine the force on a wire in a magnetic field.
The wire is held between the poles of the magnet.
The student switches on the power supply.
The diagrams show the readings with and without a current in the wire.

The student reverses the current in the wire. The magnitude of the current does not change.
What is the new reading on the balance?

The diagram represents a neutral atom.

Which row identifies each type of particle in the diagram?

An iron nuclide is represented by the symbol shown: $$^{56}_{26}\text{Fe}$$
Which statements about a nucleus of this iron nuclide are correct?
1. The nucleus contains 56 neutrons.
2. The nucleon number is 30.
3. The proton number is 26.

Three types of radiation that can cause ionisation are $\alpha$-, $\beta$- and $\gamma$-radiation.
Which row identifies the least and the most ionising of these radiations?
[Table_1]

Why are some radioactive sources stored in boxes made from lead?