OCR GCSE Physics A (Gateway) Paper 1 Foundation November 2020 question paper J249/01

1h 45m 90 marks

Materials

23 questions

Report a problem

Question

What is wrong?

Text or a picture is cut off or split Something on the paper is not here The text does not read properly The marks are wrong Something else

Goes to whoever maintains the question split. No account needed and nothing is published on this page.

What is the typical size for a small molecule?

A 0.1 cm

B 0.1 km

C 0.1 m

D 0.1 nm

$Question 1, shown as an image$

[1]

Answer

A skydiver falls from a plane.

What is the name of the downward force in the diagram?

A Drag

B Electrostatic

C Mass

D Weight

$Question 2, shown as an image$

[1]

Answer

A cyclist travels 750 m in 50 seconds.

Calculate the speed of the cyclist.

Use the equation: speed = distance / time

A 0.015 m / s

B 15 m / s

C 37.5 m / s

D 375 m / s

$Question 3, shown as an image$

[1]

Answer

Which action increases the strength of an electromagnet?

A Decreasing the current

B Decreasing the number of turns of wire

C Increasing the number of turns of wire

D Using a copper core

$Question 4, shown as an image$

[1]

Answer

A student sets up four electrical circuits.

Identify in which circuit the lamp will light up.

$Question 5, shown as an image$

[1]

Answer

On the Moon the gravitational field strength is 1.6 N / kg.

Calculate the gravity force for an 80 kg astronaut.

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

A 50 N

B 128 N

C 800 N

D 1280 N

$Question 6, shown as an image$

[1]

Answer

The different currents in four wires are shown below. The magnetic field is measured at positions A, B, C and D.

Which position will experience the strongest magnetic field?

$Question 7, shown as an image$

[1]

Answer

Look at the distance-time graph.

Which line shows the largest average speed?

$Question 8, shown as an image$

[1]

Answer

A girl runs twice around a 400 m circular track.

What is the final displacement of the girl from her starting point?

A 0 m

B 200 m

C 400 m

D 800 m

$Question 9, shown as an image$

[1]

Answer

A student investigates how the resistance of a light dependent resistor (LDR) changes with light intensity.

Which graph shows the correct relationship between the resistance of an LDR and light intensity?

$Question 10, shown as an image$

[1]

Answer

[1]

Answer

Calculate the charge flow when a current of 20 mA flows for 2000 s.

Use the equation: charge flow = current × time

A 40 C

B 100 C

C 40 000 C

D 100 000 C

$Question 12, shown as an image$

[1]

Answer

A student measures the weight of four boxes and the area in contact with the ground.

Box	Weight (N)	Area (cm²)
A	50	100
B	75	250
C	90	400
D	100	500

Which box exerts the greatest pressure on the ground?

$Question 13, shown as an image$

[1]

Answer

Which item uses the most power?

Use the equation: power = potential difference × current

	Item	Current (A)	Potential difference (V)
A	Calculator	0.1	3
B	Mobile Phone	1.0	5
C	Radio	0.5	12
D	Torch	1.2	6

$Question 14, shown as an image$

[1]

Answer

Energy is needed to change ice into water.

Calculate the energy needed to change 5 kg of ice into water.

Use an equation from the data sheet to help you.

Specific latent heat of melting = 3.34 × 10⁵ J / kg.

A 16.7 J

B 1670 J

C 1 670 000 J

D 1 670 000 000 J

$Question 15, shown as an image$

[1]

Answer

(a)

Complete the sentences about an atom.

Use words from the list.

You may use each word once, more than once, or not at all.

Atom Electrons Negatively Neutrons

Nucleus Orbits Positively Protons

An atom has a........ charged nucleus surrounded by........

charged electrons.

The nucleus contains protons and........

Almost all of the mass of an atom is in the........

[4]

Answer

(b)(i)

A swimming pool contains 9970 kg of water in 10 m³. (b) (i)

Calculate the density of water.

Use the equation: density = mass ÷ volume

Density =........ kg / m³

[2]

Answer

(b)(ii)

The diagrams, A, B and C, show the particles in three states of matter.

Write the letters in the boxes to give the correct order of density, from most to least dense.

$Question 16, shown as an image$

[1]

Answer

(b)(iii)

Explain why you chose the order in (b)(ii).

[1]

Answer

A student sets up the circuit in Fig. 17.1 to investigate the resistance of a lamp.

Fig. 17.1

(a)(i)

The student also needs to add a voltmeter to the circuit.

On Fig. 17.1 draw where the voltmeter should be connected.

[2]

Answer

(a)(ii)

The student takes readings of potential difference and current and records them in Table 17.1.

There are two mistakes in the results table.

Write down the two mistakes and suggest how they could be corrected.

[4]

Answer

(a)(iii)

Calculate the resistance of the lamp when the potential difference is 4.0 V in Table 17.1

Use the equation: potential difference = current × resistance

Resistance =........ maths symbol

[3]

Answer

(b)

The student plots the results from Table 17.1 on the graph in Fig. 17.2.

(b)(i)

Plot the missing point at 1.0 V on the graph and draw a line of best fit.

[2]

Answer

(b)(ii)

Describe the relationship between potential difference and current.

Use data from the graph to support your answer.

[2]

Answer

(b)(iii)

Explain how you could use the circuit in Fig. 17.1 to investigate the resistance of a fixed resistor instead of a lamp.

[2]

Answer

(b)(iv)

Explain how and why the graph in Fig. 17.2 would look different for a fixed resistor at a constant temperature.

[2]

Answer

A student investigates the link between the volume and pressure of a gas. The student uses a fixed mass of gas in a closed container. The student plots a graph of the results.

(a)

The student thinks that pressure multiplied by volume is always equal to the same number.

Explain why the student is correct.

Use data from the graph to support your answer.

[2]

Answer

(b)

Complete the sentences to explain how volume and pressure are related.

Use words from the list.

You can use each word once, more than once, or not at all.

doubled halved the same

If the volume of a gas is halved, the number of collisions per second between the gas

particles and the container is........

The pressure is........

[2]

Answer

(c)

The student then investigates how temperature and pressure of a gas are linked. The student measures the pressure of a gas as its temperature increases. The results are plotted on a

Explain how temperature and pressure are linked.

Use the graph to support your answer.

[2]

Answer

A toy car travels around a race track. After one lap it is back at the start position.

(a)

Explain why the velocity of the toy car is different from its speed as it travels around the track.

[2]

Answer

(b)

The mass of the toy car is 5 kg and it has an acceleration of 4 m / s². (b)

(b)(i)

Calculate the force needed to accelerate the toy car.

Use the equation: force = mass × acceleration

[2]

Answer

(b)(ii)

Suggest why the actual force needed would be more than in part (b)(i).

[1]

Answer

(c)(i)

Another toy car requires a constant force of 30 N to move it along a surface.

Calculate the work done on the car when it moves a distance of 50 m.

Use the equation: work done = force × distance

[2]

Answer

(c)(ii)

Calculate the power output of this toy car if the work is done over 75 seconds.

Use your answer from (c)(i).

[3]

Answer

20* A student investigates if lamps are brighter in a series circuit or a parallel circuit. He sets up two different circuits, A and B.

State which circuit will have the brightest lamps and explain why.

In your answer, include the variables that the student will need to control in this experiment.

[6]

Answer

A student investigates how a spring stretches.

She measures the original length of the spring, adds a 2.0 N weight, and then measures the extended length of the spring.

Look at her data in the table.

Force used	2.0 N
Original length	3.0 cm
Extended length	7.0 cm
Extension	4.0 cm

(a)(i)

Calculate the spring constant for the spring.

Use the equation: force = spring constant × extension

Spring constant =........ N / cm

[3]

Answer

(a)(ii)

Suggest two ways that the student could improve and develop their method to find the spring constant.

[2]

Answer

(b)

The spring constant of a different spring is 40 N / m.

Calculate the energy stored in the spring when it is stretched 0.20 m.

Use an equation from the data sheet to help you.

[2]

Answer

(c)

(c)(i)

Calculate the moments of the 2 N weight and the 3 N weight about the pivot.

Use the equation: moment = force × distance from pivot

Moment of 2 N weight =........ N cm

Moment of 3 N weight =........ N cm

[2]

Answer

(c)(ii)

Which way will the metre rule rotate when it is released by the student?

[1]

Answer

A student investigates static electricity using a plastic ruler.

(a)(i)

Explain in terms of electrons why the plastic ruler is not normally charged.

[2]

Answer

(a)(ii)

Explain in terms of electrons why the ruler becomes charged when the student rubs it with a cloth.

[2]

Answer

(b)

The diagram shows the electric field between two charges, A and B.

(b)(i)

State the charges of A and B.

Use the diagram to explain your answer.

[3]

Answer

(b)(ii)

Describe one similarity between the electric field line diagram and a magnetic field line diagram.

[1]

Answer

(c)

Calculate the charge when 200 J of energy is transferred with a potential difference of 40 V.

Use the equation: energy transferred = charge × potential difference

[3]

Answer

A student drops a paper ball from a balcony 4.00 m high. Her friend measures the time taken for the paper ball to reach the ground.

(a)

Suggest the equipment used to measure the height of the balcony and the time taken for the paper ball to reach the ground.

Height........

Time taken........

[1]

Answer

(b)

They record their results in a table.

Attempt	1	2	3	4	5
Time taken (s)	1.84	2.08	2.02	2.08	1.98

(b)(i)

Use the data in the table to calculate the mean, median and mode of their results.

[3]

Answer

(b)(ii)

The results are not very precise. Explain how you can tell from the data in the table.

[1]

Answer

(b)(iii)

Suggest a possible source of error in the experimental method and how it could be improved.

Source of error........

Improvement........

[2]

Answer

The paper as printed

Spotted a mistake on this page?Report a problem

OCR J249 · Paper 1

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Question 7

Question 8

Question 9

Question 10

Question 11

Question 12

Question 13

Question 14

Question 15

Question 16

Question 17

Question 18

Question 19

Question 20

Question 21

Question 22

Question 23