• 9702 November 2015 Paper 12 Worked Solutions | A-Level Physics

1 C                  11 C                21 D                31 A

2 B                  12 A                22 D                32 A

3 C                  13 C                23 C                33 A

4 B                  14 C                24 B                34 C

5 D                  15 A                25 D                35 A

6 A                  16 B                26 D                36 B

7 B                  17 C                27 A                37 A

8 C                  18 C                28 D                38 D

9 A                  19 B                29 C                39 C

10 A                20 B                30 C                40 D

5 - Ans: D.

A student measures the time T for one complete oscillation of a pendulum of length l. Her results are shown in the table.

7 - Ans: B.
A boy throws a ball vertically upwards. It rises to a maximum height, where it is momentarily at rest,and then falls back to his hands.


9 - Ans: A.
A ball is released from rest above a horizontal surface. It strikes the surface and bounces several times.


10 - Ans: A.
A bus takes a time of 25 s to reach a constant speed while travelling in a straight line. A graph of speed v against time t is shown.


12 - Ans: A.
A mass of 0.20 kg is suspended from the lower end of a light spring. A second mass of 0.10 kg is suspended from the first mass by a thread.

13 - Ans: C.
An object of mass m travelling with speed v has a head-on collision with another object of mass m travelling with speed v in the opposite direction.

16 - Ans: B.
A car of mass 500 kg is at rest at point X on a slope, as shown. The car’s brakes are released and the car rolls down the slope



20 - Ans: B.
The diagram shows the cross-section of an Olympic-size swimming pool filled with water.

21 - Ans: D.

A force acts on a wire to produce extension e. The same force then acts on a second wire of the same material, but of half the diameter and three times the length of the first wire.

 

25 - Ans: D.
Which of the following wave motions may be used to demonstrate the phenomenon of polarisation?


28 - Ans: D.
A stationary wave is set up in the tube with the same frequency as the tuning fork. The lower end of the tube is sealed.



37 - Ans: A.
The electromotive force of a power supply is 120 V. It delivers a current of 1.2 A to a resistor of resistance 80 Ω and a current of 0.40 A to another resistor, as shown.


38 - Ans: D.
The diagram shows a four-terminal box connected to a battery and two ammeters.