OCR GCSE Physics A (Gateway) Paper 3 Higher June 2019 question paper J249/03

A 2.0 kg object moves at a velocity of 40 m / s.

What is the momentum of the object?

Use the equation: momentum = mass × velocity

A 20 kg m / s

B 38 kg m / s

C 42 kg m / s

D 80 kg m / s

What is the typical diameter of an atom?

1.0 × 10^–15 m A

1.0 × 10^–10 m B

C 1.0 m

D 1.0 mm

A liquid has a volume of 0.01 m³ and a mass of 12 kg. 3

What is the density of the liquid?

Use the equation: density = mass ÷ volume

0.12 kg / m³ A

12 kg / m³ B

120 kg / m³ C

1200 kg / m³ D

Which one of the following uses of forces causes a rotation?

A Lowering a book vertically from a shelf

B Opening a door

C Lifting a book vertically onto a shelf

D Sitting in the centre of a see-saw

Which of these factors affects the strength of the magnetic field around a current-carrying wire?

A Direction of the current only

B Size of the current only

C Distance from the wire only

D Size of the current and distance from the wire

On the Moon, a 10 kg mass has a weight of 16 N.

What is the gravitational field strength on the Moon?

A 1.6 N / kg

B 6.0 N / kg

C 26 N / kg

D 160 N / kg

A student investigates four different electrical components.

She plots current-potential difference graphs for the components.

Which of the above shows the characteristic graph for a diode?

Which object has the most gravitational potential energy?

A 1 kg bag on a shelf 1 m above the ground

B 2 kg bag on a shelf 1 m above the ground

C 2 kg bag on a shelf 2 m above the ground

D 1 kg bag on a shelf 2 m above the ground

Look at the circuit diagram.

What is the current at point P in the circuit?

A 2.5 A

B 5.0 A

C 7.5 A

D 10.0 A

A student investigates cogs and gears.

Cogs A and C have 10 teeth. Cog B has 20 teeth.

Cog A is turned 5 times.

How many times does cog C turn?

A 5 times

B 10 times

C 20 times

D 50 times

Two forces act at right angles to each other.

What is the magnitude of the resultant force?

A 18 N

B 20 N

C 22 N

D 24 N

Look at the motion graphs.

Which graph shows a journey with a distance of 24 m?

Look at the field line diagrams for positive and negative charges.

Which field line diagram is correct?

A skydiver falls from a plane. His parachute opens and he lands safely.

Look at the velocity-time graph of his journey.

Which parts of the graph show balanced forces on the skydiver?

A X only

B Y and Z

C X and Z

D Y only

A spring stretches by 2.0 cm when a force is added.

The spring constant is 60 N / m.

Calculate the energy transferred to the spring when it is stretched.

A 0.012 J

B 0.024 J

C 120 J

D 240 J

A student puts an ice cube into a beaker. The mass of the ice cube is 40 g.

The ice cube melts.

Write down the mass of the water produced.

Explain your answer to (a)(i).

Describe one difference between a physical change and a chemical change.

A student does an experiment to find the difference between the specific heat capacities of seawater and tap water.

The student places a heater and a thermometer into two beakers, A and B. Look at the diagram.

There are 5 steps to the method for this experiment.

Complete the missing steps for this method.

Step 1 – Put seawater into beaker A and tap water into beaker B.

Step 5 – Calculate the temperature change of beaker A and beaker B.

Suggest one mistake the student made when choosing their equipment.

Suggest two improvements to the method followed.

A TV has the label below on it.

Calculate the current in the TV when it is turned on.

Use the equation: power = potential difference × current

Give your answer to 2 significant figures.

The TV is turned on for 30 minutes.

Calculate the energy transferred by the TV.

A student investigates how a spring stretches when a force is added.

Look at a graph of his results.

Calculate the spring constant of the spring.

Spring constant =........ N / m

The student continues to load the spring until it passes its elastic limit.

Complete the force-extension graph and label the elastic limit.

The student puts a small load on the spring. It is in equilibrium.

Draw and label a free body force diagram for the load at the end of the spring.

A student investigates the electrical characteristics of a light emitting diode (LED).

The student builds a circuit to investigate how the current through an LED and the potential difference across it vary when the LED lights up.

Look at the circuit diagram.

The student has made two errors connecting the circuit.

Identify the errors.

The student then connects the circuit correctly. He measures the current through the LED as 0.03 A when the potential difference across it is 3.0 V.

Calculate the resistance of the LED.

Use the equation: potential difference = current × resistance

Calculate the charge which flows when this LED operates for 2.5 minutes.

Calculate the energy transferred when this LED operates for 2.5 minutes.

Use the equation: energy transferred = charge × potential difference

A student investigates building model transformers in the laboratory.

Look at the diagram.

Input voltage = Output voltage

The student builds four different transformers, each with different primary and secondary coils.

Using an input voltage of 12 V the student measures the output voltage.

Look at the results.

* Explain how a transformer works and if this data supports the expected output voltages.

A student completes a project on how dynamic microphones work.

Look at her project. The student uses two incorrect words in her work.

Identify one of the incorrect words and write a correct sentence to replace the mistake.

Incorrect word........

Corrected sentence........

Name a device which uses this effect in reverse.

A student investigates how the angle of a ramp affects the final speed of a trolley.

He uses light gates to record the speed of the trolley at the bottom of the ramp.

The student releases the trolley from rest at the same point on the ramp each time.

Look at his results.

Plot the results on the graph and draw a line of best fit.

Two results have been plotted for you.

Describe the pattern shown by the results.

Use data from the table or graph in your answer.

Explain why the final speed changes when the angle of the ramp increases.

In your answer use ideas about energy.

The student made a mistake when recording one of his results.

Identify the mistake and explain what he should have done.

The student thinks this data shows that his results are reproducible.

He is not correct.

Explain why.

The mean final velocity for the ramp at a 40° angle is 3.51 m / s. The distance from the top of the ramp to the light gate at the bottom is 1.0 m.

Calculate the acceleration of the trolley when the ramp is at a 40° angle.

Give your answer to 2 decimal places.

Acceleration =........ m / s²

The trolley has a mass of 2.0 kg.

Calculate the kinetic energy of the trolley at a speed of 3.0 m / s.

A student investigates four gases.

Look at her data.

Two readings are for the same mass of the same gas at a constant temperature.

Which two readings are for the same mass of the same gas at a constant temperature?

Use calculations in your answer.

The student investigates another gas at constant volume.

Explain, using ideas about particles, how temperature affects gas pressure.

Calculate the pressure at the bottom of a 0.5 m tall measuring cylinder filled with a liquid.

Density of the liquid = 1100 kg / m³.