OCR GCSE Physics A (Gateway) Paper 3 Higher June 2023 question paper J249/03

What is 15 J converted into newton-metres?

A 0.15 N m

B 1.5 N m

C 15 N m

D 150 N m

What is the correct order of the three states of matter in increasing density?

Four athletes run a race in different times.

What is the time taken by athlete 3?

A 21.0 s

B 21.1 s

C 21.4 s

D 21.5 s

Which sentence is correct when a lever is used as a force multiplier?

A The effort force and load force are both situated at the pivot.

B The effort force is closer to the pivot than the load.

C The load force and the effort force are the same distance from the pivot.

D The load is closer to the pivot than the effort force.

One mile is equal to 1609 metres.

How many miles are there in 5000 metres?

A 0.3218 miles

B 0.6782 miles

C 2.108 miles

D 3.108 miles

A scientist wants to publish a new theory.

Which step should the scientist take before publishing the theory?

A Check the new theory with a friend.

B Have the new theory peer reviewed.

C Keep the new theory secret to avoid others copying.

D Publish the new theory in a local magazine.

Which row describes properties of electric fields and gravitational fields?

Which sentence correctly describes an object when it is moving in a circle at a constant speed?

A The object is accelerating as its velocity is changing.

B The object is accelerating as its velocity is constant.

C The object is not accelerating as acceleration is a scalar quantity.

D The object is not accelerating as its speed is constant.

Which diagram shows the correct thumb and finger labels when using Fleming’s left-hand rule?

An engineer uses a sensing circuit which produces a high output voltage when it gets dark.

Which circuit does the engineer use?

A submarine in an ocean dives from a depth of 50 m to a depth of 60 m.

What is the change in pressure due to the water acting on the submarine?

Use the Equation Sheet.

Density of seawater = 1010 kg / m³

Use g = 10 N / kg

A 10.1 Pa

B 1010 Pa

C 101 000 Pa

D 606 000 Pa

A scientist draws a velocity–time graph for an object.

What is the distance travelled by the object in 15 s?

A 0.50 kg ball moving at 3.0 m / s to the right collides with a stationary 0.60 kg ball and stops.

What is the velocity of the 0.60 kg ball immediately after the collision?

Use the Equation Sheet.

A 0.90 m / s to the left

B 0.90 m / s to the right

C 2.5 m / s to the left

D 2.5 m / s to the right

A teacher drops a ball from a height of 2.1 m. The ball hits the floor after 0.6 s.

Calculate the average speed of the ball as it falls.

Use the equation: distance travelled = average speed × time

Average speed =........ m / s

The teacher draws a free body force diagram for the ball as it falls.

Label the two forces acting on the ball as it falls.

Explain the motion of the ball as it falls.

A lorry has a mass of 30 000 kg.

Calculate the force needed to accelerate the lorry at 3.0 m / s².

Use the Equation Sheet.

A scientist investigates how the pressure and volume of a gas are related.

The results from their experiment are shown in the table.

Explain how these results show that pressure × volume = constant.

Use calculations in your answer.

The graph shows the scientist’s results.

Plot the missing point on the graph.

Draw a line of best fit on the graph.

Use the graph to find the volume of gas at 900 kPa.

Explain how and why atmospheric pressure changes with height above the surface of the Earth.

A teacher stretches an elastic band by increasing the force applied and measures the extension during loading. The teacher then reduces the force applied and measures the extension during unloading.

Fig. 18.1 shows the force–extension graph of their results.

Fig. 18.1

The teacher writes some facts about the experiment.

The elastic band obeys Hooke’s Law.

correct incorrect

The elastic band undergoes plastic deformation.

correct incorrect

There is a linear relationship between force and extension for the elastic band.

correct incorrect

A spring has a spring constant of 28 N / m.

Calculate the work done stretching this spring by 0.20 m.

Use the Equation Sheet.

A student investigates the current–potential difference characteristics of a diode.

Fig. 19.1 shows the circuit diagram the student sets up to measure the current in the diode and the potential difference across the diode.

Fig. 19.1

The student has made two mistakes when setting up the circuit.

Identify the two mistakes and explain how to correct them.

The student corrects the circuit and records the current for different values of the potential difference. Fig. 19.2 shows a graph of their results.

Fig. 19.2

State the potential difference when the diode starts to conduct.

Use the gradient of the graph to calculate a value for the resistance of the diode when it is conducting.

Resistance =........

Explain two similarities and two differences between the operation of a loudspeaker and the operation of a microphone.

Similarities........

Differences........

The diagram shows a current-carrying wire in the magnetic field between the North pole and the South pole of a magnet.

Describe and explain what happens to the wire when the switch is closed.

A current of 5.0 A passes through a wire with a length of 0.75 m.

The wire is in a field of magnetic flux density 0.30 T.

Calculate the force acting on the wire.

Give your answer to 2 significant figures.

Use the Equation Sheet.

A student makes a solenoid by wrapping wire around an iron nail as shown in the diagram.

The student investigates how the current in the wire affects the magnetic field of the solenoid.

Suggest why the student uses an iron nail in the centre of the solenoid.

* The student varies the current in the wire and uses the number of paperclips picked up by the solenoid as a measure of the strength of the magnetic field.

The results of this experiment are shown in the table.

Describe the trend shown by these results.

Suggest what the student should have done in their method to obtain accurate and valid results.

Explain how the precipitator removes the smoke particles when the gases move upwards through the chimney.

Use ideas about charges.

Suggest why many scientists think these precipitators should be fitted to all factory chimneys.

The precipitator uses high voltages.

Why are high voltages dangerous?

The collectors receive 360 C of charge every two minutes.

Calculate the current in the collectors.

Use the equation: charge flow = current × time

A medical freezer is used to keep vaccines cool.

Calculate the energy required by the freezer to cool 0.50 kg of solid vaccines from –5 °C to –35 °C.

Assume the specific heat capacity of the vaccines is 1900 J / kg °C.

Use the Equation Sheet.

It takes 5 minutes for the freezer to cool the vaccines.

Calculate the power of the freezer.

Use the Equation Sheet.

Suggest two reasons why the actual power of the freezer will be greater than that calculated in part (a)(ii).

When the vaccine is used by doctors, it has to be changed back into a liquid. The temperature of the vaccine is first raised to its melting point but it remains as a solid.

Explain two reasons why more energy is needed to change the solid vaccine into a liquid at its melting point.

Calculate the number of 5 mg vaccine doses which can be melted using 6800 J of energy.

Assume the specific latent heat of fusion for the vaccines is 340 000 J / kg.

Use the Equation Sheet.