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AS A Level Physics 9702 21 May June 2021 Paper 2. $5.49   Add to cart

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AS A Level Physics 9702 21 May June 2021 Paper 2.

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AS A Level Physics 9702 21 May June 2021 Paper 2. Data speed of light in free space c = 3.00 × 108ms−1 permeability of free space μ0 = 4π × 10−7Hm−1 permittivity of free space ε0 = 8.85 × 10−12Fm−1 ( 1 4πε0 = 8.99 × 109mF−1) elementary charge e = 1.60 × 10−19C the Pl...

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  • May 11, 2022
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Cambridge International AS & A Level
* 9 3 8 0 1 3 4 3 5 0 *




PHYSICS 9702/21
Paper 2 AS Level Structured Questions May/June 2021

1 hour 15 minutes

You must answer on the question paper.

No additional materials are needed.

INSTRUCTIONS
● Answer all questions.
● Use a black or dark blue pen. You may use an HB pencil for any diagrams or graphs.
● Write your name, centre number and candidate number in the boxes at the top of the page.
● Write your answer to each question in the space provided.
● Do not use an erasable pen or correction fluid.
● Do not write on any bar codes.
● You may use a calculator.
● You should show all your working and use appropriate units.


INFORMATION
● The total mark for this paper is 60.
● The number of marks for each question or part question is shown in brackets [ ].




This document has 16 pages. Any blank pages are indicated.


DC (DH/CB) 198450/2
© UCLES 2021 [Turn over

, 2

Data

speed of light in free space c = 3.00 × 108 m s−1

permeability of free space μ0 = 4π × 10−7 H m−1

permittivity of free space ε0 = 8.85 × 10−12 F m−1
1
( = 8.99 × 109 m F−1)
4πε0
elementary charge e = 1.60 × 10−19 C

the Planck constant h = 6.63 × 10−34 J s

unified atomic mass unit 1 u = 1.66 × 10−27 kg

rest mass of electron me = 9.11 × 10−31 kg

rest mass of proton mp = 1.67 × 10−27 kg

molar gas constant R = 8.31 J K−1 mol−1

the Avogadro constant NA = 6.02 × 1023 mol−1

the Boltzmann constant k = 1.38 × 10−23 J K−1

gravitational constant G = 6.67 × 10−11 N m2 kg−2

acceleration of free fall g = 9.81 m s−2




© UCLES 2021 9702/21/M/J/21

, 3

Formulae

1
uniformly accelerated motion s = ut + 2 at 2
v 2 = u 2 + 2as

work done on/by a gas W = p ΔV

Gm
gravitational potential φ =−
r

hydrostatic pressure p = ρgh

1 Nm 2
pressure of an ideal gas p = 3 〈c 〉
V
simple harmonic motion a = − ω 2x

velocity of particle in s.h.m. v = v0 cos ωt
v = ± ω (x 02 - x 2)
fsv
Doppler effect fo =
v ± vs

Q
electric potential V =
4πε0r

capacitors in series 1/C = 1/C1 + 1/C2 + . . .

capacitors in parallel C = C1 + C2 + . . .

1
energy of charged capacitor W = 2 QV

electric current I = Anvq

resistors in series R = R1 + R2 + . . .

resistors in parallel 1/R = 1/R1 + 1/R2 + . . .

BI
Hall voltage VH =
ntq

alternating current/voltage x = x0 sin ω t

radioactive decay x = x0 exp(−λt )

0.693
decay constant λ =
t 1
2




© UCLES 2021 9702/21/M/J/21 [Turn over

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