OCR GCSE Combined Science A (Gateway) Physics Paper 11 Higher June 2023 question paper J250/11

Which new feature of the atomic model did Niels Bohr suggest?

A Electrons are in stable shells.

B Electrons orbit a nucleus.

C The atom has a nucleus.

D The nucleus is positive.

Two rooms have the same fixed volume. They contain identical gases at the same pressure.

Room H is at a higher temperature than room L.

Which statement is correct?

A The particles are moving at the same speed in both rooms.

B The particles are moving faster in room H.

C The particles are moving faster in room L.

D The particles are not moving in either room.

Which substance listed in the table has the highest density?

Two magnets, X and Y, are placed next to each other.

Magnet X
Magnet Y

Which row is correct?

A car travels around a roundabout at 20 mph.

Why is the car accelerating?

A The direction of the car is changing.

B The forces on the car are balanced.

C The mass of the car is decreasing.

D The speed of the car is changing.

The diagram shows some forces acting on an object.

What is the resultant force on the object?

A 5.4 N

B 12 N

C 13 N

D 14.9 N

Which diagram explains how a simple d.c. electric motor spins?

A positively charged rod is rubbed across the brass cap of the gold leaf electroscope.

Complete the sentence to explain how the gold leaf electroscope becomes positively charged.

Use words from the list.

Electrons Gold leaf electroscope Neutrons Protons

Positively charged rod

........ move from the........ to the........

When the gold leaf electroscope is positively charged, the gold leaf rises.

Fig. 11.2 shows the positively charged gold leaf electroscope.

Fig. 11.2

Explain why the gold leaf rises.

A scientist earths the cap of the positively charged gold leaf electroscope by touching it with their finger.

Complete Fig. 11.3 to show what happens to the gold leaf. Explain your answer.

Fig. 11.3

A student measures the acceleration due to gravity by dropping a ball through a light gate.

The diagram shows the experiment.

Draw lines to match each source of error in the experiment to the correct way to remove the error.

Source of error
Way to remove the error

The light gate and computer are used to calculate the final velocity of the ball.

What information does the student have to enter into the computer?

The computer displays a final velocity of 7.2 m / s when the student drops the ball from 2.7 m.

Calculate a value for the acceleration due to gravity.

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

Acceleration due to gravity =........ m / s²

A student builds the circuit shown in the diagram. W, X, Y and Z are points in the circuit.

Calculate the potential difference between Y and Z.

Use the Equation Sheet.

The resistance of the circuit between Y and Z must be less than 10 .

Explain why.

Calculate the current at W.

Which statement describes the values of the current at W and X ?

Tick (✓) one box.

Calculate the power dissipated by one of the 10 resistors.

Use the Equation Sheet.

Three students A, B and C do an experiment to measure the power rating of a Bunsen burner.

The diagram shows their apparatus.

This is the method they follow:

• Pour 0.2 kg of water into a beaker.

• Increase the temperature of the water using the Bunsen burner.

• Measure the temperature of the water every 30 seconds.

The graph shows student A ’s results.

Student A uses point P on the graph to calculate the gradient of the line of best fit.

Explain why student A ’s calculation is incorrect.

Calculate the gradient of the line of best fit on the graph. Give your answer to 2 significant figures.

Gradient =........ °C / s

What is the significance of the y intercept of the line on the graph?

What is the significance of the gradient of the line on the graph?

Student B repeats the experiment. The gradient of their line of best fit is 0.25 °C / s. The specific heat capacity of water is 4200 J / kg °C.

Use student B ’s value to calculate the thermal energy transferred to 0.2 kg of water after 200 s.

Use the Equation Sheet.

Student C also repeats the experiment.

They say the thermal energy transferred is 32 000 J after 200 s.

Use student C ’s value to calculate the power of the Bunsen burner.

Use the Equation Sheet.

A child is holding a marble at a height of 0.8 m.

The mass of the marble is 0.015 kg.

Calculate the gravitational potential energy of the marble.

Gravitational field strength = 10 N / kg.

Use the equation: gravitational potential energy = mass × gravitational field strength × height

The child rolls the marble along a track. The diagram shows the marble and track.

The kinetic energy of the marble at the bottom of the track is less than the potential energy of the marble calculated at the top of the track.

Suggest and explain why.

The mass of the marble is 0.015 kg.

The kinetic energy of the marble at the bottom of the track is 0.03 J.

Calculate the speed of the marble at the bottom of the track. Use the equation: kinetic energy = × mass × (speed)²

Speed of marble =........ m / s

The child now has a small marble and a large marble. The child rolls the small marble across the floor. The small marble collides with the stationary large marble.

The diagram shows the marbles before and after the collision.

Before the collision
After the collision

The mass of the small marble is 5 grams. The mass of the large marble is 20 grams.

Use the information in the diagram to calculate the speed of the large marble after the collision.

Use the Equation Sheet.

Speed of large marble =........ m / s