OCR GCSE Combined Science A (Gateway) Physics Paper 11 Higher November 2021 question paper J250/11

A teacher is distilling water using the equipment shown in the diagram.

Distillation involves evaporating and condensing the water.

When the teacher starts, there is 100 g of water in the flask, and the beaker is empty.

They stop when less than half of the water in the flask has been distilled.

Which statement is correct?

A Mass of water in flask + Mass of water in beaker = 100 g

B Mass of water in flask – Mass of water in beaker = 100 g

C Mass of water in flask = Mass of water in beaker

D There is twice as much water in the beaker than in the flask

A magnetic field is produced around a current-carrying wire.

A student views the magnetic field from above, as shown by the eye in the diagram.

Which diagram shows the magnetic field around the wire?

Which row of the table describes charge and current?

Circuits X and Y contain identical lamps.

Which statement explains why circuit X has a higher resistance than circuit Y ?

A In circuit X each lamp has the full potential difference across it.

B In circuit X the current is the same at all points.

C In circuit Y the current is the same at all points.

D In circuit Y there are two pathways for current.

Electrical circuits can be used to transfer energy.

Which row of the table correctly shows the information needed to calculate the amount of energy

This apparatus is used to measure the pressure of a fixed volume of gas.

When the temperature of water increases what happens to the pressure and the speed of the gas particles?

A current-carrying wire is placed in a magnetic field.

The magnetic flux density between the poles is 0.08 T.

Calculate the force acting on the wire.

Use values from the diagram and an equation from the Data Sheet to help you.

9.6 × 10⁻⁵ N A

9.6 × 10⁻⁴ N B

9.6 × 10⁻³ N C

9.6 × 10⁻² N D

Place the events in the order they occurred.

Write the numbers in the boxes below. One has been done for you.

The events were peer reviewed and communicated to others.

Suggest why both are important in science.

Table 11.1 gives the density of different materials.

Describe any trends in the data in Table 11.1.

Explain the difference in density between solids and liquids.

You may draw diagrams to help your answer.

Table 11.2 gives some information about ethanol and water.

The specific latent heat of vaporisation is the energy transferred when 1 kg of a substance changes from liquid to gas.

Calculate the amount of energy needed to evaporate 0.2 kg of ethanol.

Use Table 11.2 and an equation from the Data Sheet to help you.

The energy needed to heat 1 kg of water by 1 °C is 4200 J.

The energy needed to evaporate 1 kg of water is 2 256 000 J.

This is much more than 4200 J. Explain why.

Explain in words what is meant by power.

A weightlifter lifts a 200 pound (200 lb) mass.

1 lb = 0.454 kg.

Calculate the weight of the mass in Newtons.

Use the equation: gravitational force = mass × gravitational field strength

Gravitational field strength = 10 N / kg.

This is some data for a weightlifter.

Weight lifted = 620 N Height of the lift = 1.6 m Time taken to complete lift = 4.0 s

Calculate the power generated by the weightlifter.

Use the equations: work done = force × distance power = work done / time

13* This is the plan view of a corridor in a school building.

The arrow XY shows the path student A takes to walk around the corridor from Room 1 to Room 2

Student A takes 120 seconds to walk from point X to point Y. Student B describes the motion:

‘The average velocity of student A is greater than their average speed.’

‘This is because their displacement is greater than the distance they travel.’

Evaluate these statements.

Use calculations to help explain your answer.

This is a picture of a ball on a field.

Draw a free-body force diagram for the ball.

The ball is stationary on the field. Explain why using Newton’s laws.

Student A kicks the ball with their toes.

This hurts the student’s toes. Explain why using Newton’s laws.

Student A kicks the ball.

Their boot is in contact with the ball for 0.05 s.

The velocity of the ball increases by 25 m / s.

Calculate the acceleration of the ball.

Use the equation: acceleration = change in velocity / time

Acceleration =........ m / s²

Student B kicks the ball with a force of 216 N.

The mass of the ball is 0.45 kg.

Calculate the acceleration of the ball.

Use the equation: force = mass × acceleration

Acceleration =........ m / s²

A student does an experiment to measure the resistance of a coil of wire.

The diagrams in Fig. 15.1 show the meters used in this experiment:

Meter V measures potential difference.

Complete the table to describe meter V.

Name of meter V

Smallest change in potential difference that can be measured on meter V

Draw a circuit diagram for the experiment.

Use the symbol for a fixed resistor to represent the coil of wire that the student is testing.

Write down the values of potential difference and current shown by the meters in Fig. 15.1.

Calculate the resistance of the coil of wire.

Resistance =........

To improve the experiment, the student places the coil of wire in a beaker of water, as shown in Fig. 15.2.

Suggest two reasons why this improves the experiment.

The student adds a variable resistor in series with the wire.

Suggest two reasons why this improves the method.