• 9702 June 2015 Paper 13 Worked Solutions | A-Level Physics

1 C                  11 C                21 B                31 D

2 D                  12 B                22 A                32 D

3 D                  13 C                23 C                33 C

4 B                  14 A                24 D                34 C

5 B                  15 A                25 C                35 A

6 C                  16 A                26 D                36 A

7 D                  17 A                27 D                37 C

8 D                  18 C                28 D                38 D

9 B                  19 B                29 C                39 A

10 C                20 B                30 B                40 C

1 - Ans: C.
Which statement includes a correct unit? A energy = 7.8 N s


3 - Ans: D. See solution 976 at
The speed of an aeroplane in still air is 200 km h–1. The wind blows from the west at a speed of 85.0 km h–1.


12 - Ans: B. See solution 1010 at
Two balls X and Y are moving towards each other with speeds of 5 m s–1 and 15 m s–1 respectively.


13 - Ans: C. See solution 996 at

A wooden block is freely supported on brackets at a height of 4.0 m above the ground, as shown.

14 - Ans: A.

Four cuboids with identical length, breadth and height are immersed in water.

15 - Ans: A.
An air bubble in a tank of water is rising with constant velocity. The forces acting on the bubble are X, Y and Z as shown.


17 - Ans: A.
The gas in an engine does work on a piston of cross-sectional area 80 cm2. The pressure on the piston has a constant value of 4.6 × 105 Pa.


18 - Ans: C.
A loaded aeroplane has a total mass of 1.2×105 kg while climbing after take-off. It climbs at an angle of 23°to the horizontal with a speed of 50 m s–1.



21 - Ans: B. See solution 1002 at
A W-shaped tube contains two amounts of mercury, each open to the atmosphere. Air at pressure P is trapped in between them.


26 - Ans: D. See solution 1014 at
A wave pulse moves along a stretched rope in the direction shown.


29 - Ans: C. See solution 1037 at
Wave generators at points X and Y produce water waves of the same wavelength. At point Z, the waves from X have the same amplitude as the waves from Y.


30 - Ans: B.
A molecule behaves as an electric dipole consisting of two equal point charges, of opposite sign, separated by a fixed distance.


34 - Ans: C.
A simple circuit is formed by connecting a resistor of resistance R between the terminals of a battery of electromotive force (e.m.f.) 9.0 V and constant internal resistance r.


36 - Ans: A. See solution 1007 at
A box with four terminals P, Q, R and S contains two identical resistors. When a battery of electromotive force (e.m.f.) E and negligible internal resistance is connected across PS, a high-resistance voltmeter connected across QR reads E/2.



37 - Ans: C.
The diagram shows part of a current-carrying circuit. The ammeter has negligible resistance.