OCR GCSE Combined Science A (Gateway) Physics Paper 5 Foundation June 2019 question paper J250/05

This question is about magnetic forces.

Which of the following would cause repulsion?

How many amperes are there in 1 microampere (1 A)?

B 0.001

C 1000

A sealed boiling tube contains gas.

The boiling tube is heated.

What happens?

A The particles in the gas evaporate.

B The particles in the gas expand.

C The particles in the gas move faster.

D The particles in the gas move slower.

Which row of the table is correct?

Use the equation: charge flow = current time

Which circuit gives a flow of charge?

Which row of the table gives a power of 300 W?

Use the equation: power = work done ÷ time

A car changes velocity from 5 m / s to 15 m / s in 10 s.

What is the acceleration of the car?

Use the equation: acceleration = change in velocity ÷ time

0.5 m / s² A

1.0 m / s² B

1.5 m / s² C

2.0 m / s² D

Look at the graph of distance against time for an object.

What is the speed of the object?

A 0.5 m / s

B 2.0 m / s

C 4.0 m / s

D 8.0 m / s

Some quantities are vectors and some are scalars.

Which row of the table is correct?

A student is given a solid metal cube.

Explain how the student can use a ruler to calculate the volume of the metal cube.

The metal cube has a volume of 125 cm³ and a mass of 850 g. (ii)

Calculate the density of the metal cube.

Use the equation: density = mass ÷ volume

Density =........ g / cm³

The student wants to calculate the density of a stone. The stone has an irregular shape.

Suggest one piece of apparatus that she can use to measure the mass of the stone.

Suggest one piece of apparatus that she can use to measure the volume of the stone.

A teacher shows her class some magnets.

Fig. 12.1 shows the magnetic field around a bar magnet.

What is the direction of the magnetic field at X ?

Draw an arrow on the diagram in Fig. 12.1 to show your answer.

Where is the magnetic field strongest around the bar magnet?

A compass points towards ‘magnetic north’.

What does this tell us about the Earth?

The teacher wraps a coil of insulated wire around a soft iron core as shown in Fig. 12.2.

Describe what the student needs to do to create a magnetic field.

The student changes the number of turns in the coil. He records the number of steel pins that the magnetic field can pick up.

The student concludes ‘The more turns, the stronger the magnetic field’.

Explain if his conclusion is true. Use the results in the table in your answer.

A student hangs a mass from the end of a spring as shown in Fig. 13.1.

The spring in Fig. 13.1 extends by 0.06 m. The spring constant is 25 N / m.

Calculate the force on the spring.

Use the equation: force = extension spring constant

Label the forces on the diagram in Fig. 13.2.

The loop at the end of the spring breaks and the mass falls.

Explain why the mass falls and describe its motion as it falls.

The mass is placed on a bench, as shown in Fig. 13.3.

This is a diagram showing the force of the bench on the mass.

Newton’s third law is about how forces come in pairs.

Complete the table to describe the other force in this pair.

A student measures the acceleration of a trolley on a horizontal surface.

Fig. 15.1 is a diagram of her experiment.

The weight of the masses accelerates the trolley.

Define the term weight.

Show that the weight of a 100 g mass is 1 N.

Friction can change the results of this experiment.

Suggest one way friction can be reduced.

The tall parts of the card on the trolley (U and V) pass through the light gate, as shown in Fig. 15.2.

The velocity of U is 0.5 m / s.

The velocity of V is 1.0 m / s.

Calculate the acceleration of the trolley.

Use the equation: (final velocity)² – (initial velocity)² = 2 acceleration distance

Acceleration =........ m / s²

When the trolley reaches the edge of the surface, it is moving at 1.2 m / s.

The mass of the trolley is 1.0 kg.

Calculate the kinetic energy of the trolley.

The student repeats the experiment with different masses.

This is a graph showing her results.

The student says, ‘The graph shows that the acceleration of the trolley is directly proportional to the force.’

Is the student correct?

Explain your answer.

A student makes a ‘component tester’. He connects a diode to a small filament lamp.

This is a diagram of the component tester.

Describe how the student could use the component tester to find the positive (+) terminal of a cell.

Here is a graph of current against potential difference for a diode.

The diode is not a fixed resistor.

Describe two ways the graph shows this.

Calculate the resistance of the diode at + 0.8 V.

Use the graph and the equation: potential difference = current resistance

Resistance =........

The manufacturer of the diode gives the following warning:

The supply voltage must not exceed 1 V.

Use the graph in 16(b) to explain why.

Sketch a graph of current against potential difference for a filament lamp. Use the axes below.