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WITH THE PHYSICS CAFE

H2 PHYSICS

MOCK EXAM SET C P1

NAME: ………………………………….

School: …………………………………

30

I will take the exam like a SMART student

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Data

speed of light in free space, c = 3.00 x 108 m s1

permeability of free space, μ0 = 4π x 107 H m1

permittivity of free space, 0 = 8.85 x 1012 F m1

(1 / (36 π)) x 109 F m1

elementary charge, e = 1.60 x 1019 C

the Planck constant, h = 6.63 x 1034 J s

unified atomic mass constant, u = 1.66 x 1027 kg

rest mass of electron, me = 9.11 x 1031 kg

rest mass of proton, mp = 1.67 x 1027 kg

molar gas constant, R = 8.31 J K1 mol1

the Avogadro constant, NA = 6.02 x 1023 mol1

the Boltzmann constant, k = 1.38 x 1023 J K1

gravitational constant, G = 6.67 x 1011 N m2 kg2

acceleration of free fall, g = 9.81 m s2

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Formulae

uniformly accelerated motion, s = 212

ut at

2v = 2 2u as

work done on/by a gas, W = pΔV

hydrostatic pressure, p = ρgh

gravitational potential, =Gm

r

displacement of particle in s.h.m., x = x0 sin t

velocity of particle in s.h.m., v = v0 cos t

= 2 20x x

resistors in series, R = R1 + R2 + …

resistors in parallel, 1/R = 1/R1 + 1/R2 + …

electric potential, V =4

Q

r

alternating current/voltage, x = x0 sin t

transmission coefficient, T = exp(2kd)

where k = 2

2

8 m U E

h

radioactive decay, x = x0 exp (λt)

decay constant, λ =12

0.693

t



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3 A metal sphere is held just below the surface of a deep tank of liquid and released.

Which of the following best illustrates how the acceleration a varies with time t after release?

A B

C D



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14 The intensity of a progressive wave, besides being dependent on the amplitude of the wave, is also

proportional to the square of the frequency.

The diagram shows two waves X and Y.

The intensity of wave X is I0.

What is the intensity of wave Y?

A 0.028 I0 B 0.11 I0 C 0.44 I0 D 2.25 I0



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20 Three identical electrical sources each with internal resistance r are used to operate a lamp of

resistance R as shown in figure below.

What fraction of the total power is lost due to the internal resistance of the sources?

A3R + r

3RB

3R ─ r3R

Cr

3R + rD

3R3R + r

R

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22 Four different arrangements of identical resistors are connected to the same constant voltage power

supply. An ammeter of negligible resistance is connected as shown in each arrangement.

In which arrangement will the ammeter show the minimum reading?

A B

C D



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