OCR GCSE Combined Science A (Gateway) Physics Paper 6 Foundation June 2018 question paper J250/06

A transverse wave and a longitudinal wave travel in the direction shown by the arrow.

The table shows how the particles in these waves vibrate as the waves travel.

Which row of the table is correct?

Which of these electromagnetic waves has the smallest wavelength?

A Gamma-ray

B Micro-wave

C Radio wave

D X-ray

Atoms contain electrons. An atom can lose its outer electrons.

What is this process called?

A Friction

B Ionisation

C Radiation

D Radioactive decay

Energy is transferred when a machine is switched on.

• 1000 J is the input energy transfer

• 750 J is useful output energy transfer

Use the equation: Efficiency = Useful output energy transfer ÷ Input energy transfer

Calculate the efficiency of this machine.

A 0

B 0.25

C 0.75

D 750

What is the speed of sound in air?

A 30 m / s

B 100 m / s

C 340 m / s

D 300 000 000 m / s

An electric kettle is plugged into a socket. The kettle is switched on. A qualified electrician uses three voltmeters, V₁, V₂ and V₃.

Use the relationship: V₃ = V₁ + V₂

Which row in the table, A, B, C or D, shows the correct readings for the three voltmeters?

An element gives out a beta () particle.

The table shows how the atomic number and mass number of the element change.

Which row of the table is correct?

A moving car crashes into a wall.

Which row in the table describes one of the energy transfers?

The graph shows how speed in miles per hour (mph) is related to speed in metres per second

A car travels at 20 mph.

What is the speed of this car in m / s?

A 8 m / s

B 9 m / s

C 43 m / s

D 45 m / s

A car travels at a speed of 10 m / s. The mass of the car is 800 kg.

Use the equation: Kinetic energy = 0.5 × Mass × Speed²

What is the kinetic energy of this car?

A 4000 J

B 8000 J

C 40 000 J

D 80 000 J

This question is about radioactivity.

A teacher shows his class an experiment. The teacher wants to identify the type of radiation given out by a radioactive isotope.

He uses a Geiger-Muller tube connected to a counter to measure the count rate.

He places different materials between the radioactive isotope and the Geiger-Muller tube.

The table shows the count rate for different materials.

Suggest why the teacher places lead around most of the radioactive isotope.

There are three types of radiation, alpha, beta and gamma.

Which type of radiation is given out by the radioactive isotope?

Explain your answer.

Use the data in the table to help.

The table shows some information about electrical appliances in the home.

Appliance	Power (W)	Current (A)	Resistance ()
Hairdryer	1800	7.8	29.6
Heater	800	3.5	66.1
Iron	2000	8.7	26.4
Kettle	2500	10.9	21.0

A teacher says: ‘As power increases, resistance increases’

Use data from the table to explain your answer.

The kettle is switched on for 60 seconds.

Calculate the energy transferred.

Electricity companies do not use joules (J) in electricity bills. Electricity companies use kilowatt-hours (kWh).

A hairdryer has a power of 1800 W.

What is the power of the hairdryer in kilowatts (kW)?

Suggest why electricity companies charge for electricity using kWh.

The average electricity consumption per household changes every year.

The graph shows how this changes from the year 2008 to the year 2015.

Describe and explain the trend shown by the graph.

A student draws a diagram to show the national grid.

State the two mistakes in the diagram.

The national grid uses transformers.

Explain how using transformers makes the national grid more efficient.

Explain the difference between direct voltage and alternating voltage.

A scientist does an experiment to measure the energy transferred to water.

She uses an immersion heater to increase the temperature of the water.

The scientist uses this apparatus:

• A beaker

• An immersion heater

• A stirring rod

• A 12 V battery and wires.

What two other pieces of apparatus does the scientist need for this experiment?

Explain how the scientist could reduce energy transfer to the surroundings.

The immersion heater is placed at the bottom of the beaker.

Suggest why.

The heater is connected to a battery. When the heater is turned on, energy is transferred.

Describe this energy transfer.

Use ideas about energy stores.

The current through the heater is 3.8 A. The potential difference across the heater is 9.0 V.

Use the equation: Power = Potential difference × Current

Calculate the power of the immersion heater.

The scientist writes down more information about her experiment.

• Mass of water = 150 g

• Specific heat capacity of water = 4200 J / kg °C

• Temperature increase of water = 10 °C

Calculate the change in thermal energy of the water.

15* Person A and person B drive their cars along the same road on different days. Both cars travel at 25 m / s.

The traffic lights along the road change to red. Person A and person B see the red light and press the brakes in their car.

The graphs show the speed of each car after person A and person B see the red light.

The graphs are drawn using the same scale.

Describe the different ways the cars come to a stop.

In your answer:

• Suggest reasons why the cars take different times to stop

• Write about thinking and braking.

The graph shows how the height of a water wave changes with distance.

The water wave has a wavelength of 6 m.

Describe how the graph shows this.

The frequency of the water wave is 0.5 Hz.

Calculate the speed of this water wave.

Answer =........ m / s

A group of students use a ripple tank, a metre ruler and a stopwatch.

They draw a diagram of this equipment.

Explain how this equipment is used to measure the frequency of water waves.

A student measures the extension of a spring when it is stretched.

He hangs different cubes from the spring. He measures the extension of the spring for each cube.

Look at his results.

Plot a graph of the results on the grid.

Use the results and the graph to show the spring constant is 35 N / m.

The spring constant is 35 N / m.

Calculate the energy transferred to this spring when the extension is 0.2 m.