• 9702 June 2017 Paper 42 Worked Solution | A-Level Physics

Question 2
The pressure p and volume V of an ideal gas are related to the density ρ of the gas by the expression




Question 12
One nuclear reaction that can take place in a nuclear reactor may be represented, in part, by the equation

• 9702 November 2018 Paper 41 & 43 Worked Solution | A-Level Physics

Question 9
A coil C having 120 turns of wire is wound on to one end of the core. The area of cross-section of coil C is 1.5 cm2.

• 9702 November 2018 Paper 23 Worked Solution | A-Level Physics

Question 2
A cannon fires a shell vertically upwards. The shell leaves the cannon with a speed of 80 m s-1 and a kinetic energy of 480 J.



Question 4
On Fig. 4.1, complete the two graphs to illustrate what is meant by the amplitude A, the wavelength λ and the period T of a progressive wave.


Question 6
An electric current is a flow of charge carriers. In the following list, underline the possible charges for a charge carrier.



Question 7
The graph shows a cross (labelled P) that represents a nucleus P.  Nucleus P decays by emitting an α particle to form a nucleus Q.

• 9702 June 2019 Paper 22 Worked Solution | A-Level Physics

Question 5
A battery of electromotive force (e.m.f.) 5.6 V and internal resistance r is connected to two external resistors, as shown in Fig. 5.1.

• 9702 November 2018 Paper 12 Worked Solution | A-Level Physics

1 A                  11 D                21 D                31 C

2 B                  12 C                22 D                32 D

3 B                  13 A                23 B                33 A

4 A                  14 C                24 A                34 A

5 A                  15 D                25 D                35 D

6 C                  16 A                26 D                36 B

7 B                  17 A                27 A                37 B

8 B                  18 B                28 B                38 C

9 B                  19 A                29 A                39 C

10 D                20 D                30 C                40 A

28 - Ans: B.
What happens when waves pass through a gap equal to their wavelength?



29 - Ans: A.
Two sources of microwaves P and Q produce coherent waves with a phase difference of 180.  The waves have the same wavelength λ.

• 9702 November 2017 Paper 12 Worked Solution | A-Level Physics

1 D                  11 D                21 A                31 A

2 A                  12 B                22 D                32 B

3 C                  13 D                23 D                33 D

4 D                  14 A                24 B                34 C

5 C                  15 B                25 C                35 A

6 B                  16 A                26 D                36 B

7 B                  17 D                27 D                37 B

8 D                  18 A                28 C                38 A

9 C                  19 B                29 C                39 A

10 B                20 D                30 D                40 C

6 - Ans: B.

A hot-air balloon is moving vertically upwards with a constant speed of 3.00 m s-1.

12 - Ans: B.
The diagram shows a solid cube with weight W and sides of length L. It is supported at rest by a frictionless spindle that passes through the centres of two opposite vertical faces.


14 - Ans: A.
Two rigid steel beams XY and YZ are fixed at their lower ends and are hinged at Y. Each beam is inclined at 50 to the horizontal, as shown.



15 - Ans: B.
Air is trapped inside a glass bulb which is immersed in water and attached to a U-tube containing mercury.

21 - Ans: A.

A rectangular block of steel supporting a very large component of a bridge has a height of 15 cm and a cross-section of 20 cm × 12 cm.

32 - Ans: B.
An electron moves between two points X and Y in a uniform electric field, as shown.   The distance between X and Y is 4.0 cm and the line XY is at an angle of 60 to the direction of the field.



37 - Ans: B.
The circuit shown contains a resistor S that is neither in series nor in parallel with the other resistors.

• 9702 June 2019 Paper 42 Worked Solution | A-Level Physics

Question 2
At point A, the gas has volume 2.4 × 10-3 m3, pressure 1.6 × 105 Pa and temperature 300 K.




Question 3
A spring is hung vertically from a fixed point. A mass M is hung from the other end of the spring, as illustrated in Fig. 3.1.



Question 5
The initial section of the transmission line for a signal from a telephone exchange is illustrated in Fig. 5.1.



Question 6
Two parallel metal plates A and B are held a distance d apart in a vacuum, as illustrated in Fig. 6.1.

Question 8

An electron is travelling in a vacuum at a speed of 3.4 × 107 m s-1. The electron enters a region of uniform magnetic field of flux density 3.2 mT, as illustrated in Fig. 8.1.

Question 9
Part of a circuit incorporating an operational amplifier (op-amp) is shown in Fig. 9.1.

• 9702 November 2016 Paper 42 Worked Solution | A-Level Physics

Question 1
The nearest star to the Sun is Proxima Centauri. This star has a mass of 2.5 × 1029 kg and is a distance of 4.0 × 1013 km from the Sun.

• 9702 March 2019 Paper 12 Worked Solution | A-Level Physics

1 A                  11 C                21 C                31 B

2 B                  12 D                22 D                32 D

3 D                  13 D                23 C                33 C

4 A                  14 D                24 D                34 A

5 B                  15 C                25 D                35 D

6 A                  16 D                26 C                36 B

7 C                  17 B                27 C                37 A

8 B                  18 D                28 A                38 D

9 A                  19 B                29 B                39 D

10 C                20 D                30 A                40 D

3 - Ans: D.
The speed of an aircraft in still air is 200 km h-1. The wind blows from the west at a speed of 85.0 km h-1.



7 - Ans: C.
A stone is thrown vertically upwards from a point that is 12 m above the sea. It then falls into the sea below after 3.4 s.


8 - Ans: B.
Two balls X and Y are moving towards each other with speeds of 5 m s-1 and 15 m s-1  respectively.


11 - Ans: C.
A ball falls through a liquid at a constant speed. It is acted upon by three forces: an upthrust, a drag-force and its weight.


12 - Ans: D.
A fairground ride consists of four carriages connected to a central vertical pole, as shown in the following view from above.


14 - Ans: D.
An object shaped as a hemisphere rests with its flat surface on a table. The object has radius r and density ρ.



29 - Ans: B.
A diffraction grating experiment is set up using yellow light of wavelength 600 nm.