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Drayton Manor High School

A‐level Physics (7407/7408)

AS MCQ 4

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Q1.A narrow beam of monochromatic light falls on a diffraction grating at normal incidence. The second order diffracted beam makes an angle of 45° with the grating. What is the highest order visible with this grating at this wavelength?

A 2

B 3

C 4

D 5 (Total 1 mark)

Q2.Which one of the following types of wave cannot be polarised?

A radio

B ultraviolet

C microwave

D ultrasonic (Total 1 mark)

Q3.The audible range of a girl's hearing is 30 Hz to 16 500 Hz. If the speed of sound in air is 330 m s−1, what is the shortest wavelength of sound in air which the girl can hear?

A m

B m

C m

D m (Total 1 mark)


Q4.

displacement

The graph shows, at a particular instant, the variation of the displacement of the particles in a transverse progressive water wave, of wavelength 4 cm, travelling from left to right. Which one of the following statements is not true?

A The distance PS = 3 cm.

B The particle velocity at Q is a maximum.

C The particle at S is moving downwards

D Particles at P and R are in phase. (Total 1 mark)

Q5.Interference fringes, produced by monochromatic light, are viewed on a screen placed a distance D from a double slit system with slit separation s. The distance between the centres of two adjacent fringes (the fringe separation) is w. If both s and D are doubled, what will be the new fringe separation?

A

B w

C 2w

D 4w (Total 1 mark)

Q6.A microwave transmitter is used to direct microwaves of wavelength 30 mm along a line XY. A metal plate is positioned at right angles to XY with its mid-point on the line, as shown.


When a detector is moved gradually along XY, its reading alternates between maxima and minima. Which one of the following statements is not correct?

A The distance between two minima could be 15 mm.

B The distance between two maxima could be 30 mm.

C The distance between a minimum and a maximum could be 30 mm.

D The distance between a minimum and a maximum could be 37.5 mm. (Total 1 mark)

Q7.A source emits light of wavelength 600 nm as a train of waves lasting 0.01 µs. How many complete waves are sent out? speed of light = 3 × 108 m s−1

A 5 × 106

B 18 × 107

C 5 × 109

D 5 × 1022

(Total 1 mark)

Q8.A wave of frequency 5 Hz travels at 8 km s–1 through a medium. What is the phase difference, in radians, between two points 2 km apart?

A0

B

Cπ

D (Total 1 mark)


Q9.Light of wavelength λ is incident normally on a diffraction grating of slit separation 4λ. What is the angle between the second order maximum and third order maximum?

A 14.5°

B 18.6°

C 48.6°

D 71.4° (Total 1 mark)

Q10.In a Young’s double slit interference experiment, monochromatic light placed behind a single slit illuminates two narrow slits and the interference pattern is observed on a screen placed some distance away from the slits. Which one of the following decreases the separation of the fringes?

A increasing the width of the single slit

B decreasing the separation of the double slits

C increasing the distance between the double slits and the screen

D using monochromatic light of higher frequency (Total 1 mark)

Q11.Stationary waves are set up on a length of rope fixed at both ends. Which one of the following statements is true?

A Between adjacent nodes, particles of the rope vibrate in phase with each other.

B The mid point of the rope is always stationary.

C Nodes need not necessarily be present at each end of the rope.

D Particles of the rope at adjacent antinodes always move in the same direction. (Total 1 mark)


Q12.The fission of one nucleus of uranium 235 releases 200 MeV of energy. What is the value of this energy in J?

A 3.2 × 10−25 J

B 3.2 × 10−17 J

C 3.2 × 10−11 J

D 2.0 × 106 J (Total 1 mark)

Q13.

Point sources of sound of the same frequency are placed at S1 and S2. When a sound detector is slowly moved along the line PQ, consecutive maxima of sound intensity are detected at W and Y and consecutive minima at X and Z. Which one of the following is a correct expression for the wavelength of the sound?

A S1X – S1W

B S1Y – S1X

C S1X – S2X

D S1Y – S2Y (Total 1 mark)

Q14.Two points on a progressive wave differ in phase by . The distance between them is 0.5 m, and the frequency of the oscillation is 10 Hz. What is the minimum speed of the wave?


A 0.2 m s−1

C 10 m s−1

C 20 m s−1

D 40 m s−1

(Total 1 mark)

Q15.The diagram shows a microwave transmitter T which directs microwaves of wavelength eat two slits S1 and S2 formed by metal plates. The microwaves that pass through the two slits are detected by a receiver.

receiver at O

When the receiver is moved to P from O, which is equidistant from S1 and S2, the signal received decreases from a maximum to a minimum. Which one of the following statements is a correct deduction from this observation?

A The path difference S1O – S2O = 0.5 λ

B The path difference S1O – S2O = λ

C The path difference S1P – S2P = 0.5 λ

D The path difference S1P – S2P = λ (Total 1 mark)

Q16.Which line, A to D, in the table gives a correct difference between a progressive wave and a stationary wave?

progressive wave stationary wave

A all the particles vibrate some of the particles do not

vibrate


B none of the particles vibrate with the same amplitude

all the particles vibrate with the same amplitude

C all the particles vibrate in phase with each other

none of the particles vibrate in phase with each other

D some of the particles do not vibrate

all the particles vibrate in phase with each other

(Total 1 mark)

Q17.Light of wavelength λ is incident normally on a diffraction grating for which adjacent lines are a distance 3λ apart. What is the angle between the second order maximum and the straight-through position?

A 9.6°

B 20°

C 42°

D There is no second order maximum. (Total 1 mark)

Q18.The speed of sound in water is 1500 m s−1. For a sound wave in water having frequency 2500 Hz, what is the minimum distance between two points at which the vibrations

are rad out of phase?

A 0.05 m

B 0.10 m

C 0.15 m

D 0.20 m (Total 1 mark)

Q19.Which line, A to D, in the table shows correct relationships for the respective wavelengths, λL, λS, and frequencies, fL, fS, of light waves and sound waves?


wavelengths frequencies

A λL << λS fL >> fS

B λL << λS fL << fS

C λL >> λS fL >> fS

D λL >> λS fL << fS

(Total 1 mark)

Q20.Which one of the following properties of light waves do polarising sunglasses depend on for their action?

Light waves may

A interfere constructively.

B interfere destructively.

C be polarised when reflected from a surface.

D be polarised by the lens in the eye. (Total 1 mark)

Q21.The diagram shows a snapshot of a wave on a rope travelling from left to right.

At the instant shown, point P is at maximum displacement and point Q is at zero displacement. Which one of the following lines, A to D, in the table correctly describes the motion of P and Q in the next half-cycle?

P Q

A falls then rises rises

B falls then rises rises then falls

C falls falls


D falls rises then falls

(Total 1 mark)

Q22.

The diagram above shows the first four diffraction orders each side of the zero order when a beam of monochromatic light is incident normally on a diffraction grating of slit separation d. All the angles of diffraction are small. Which one of the patterns, A to D, drawn on the same scale, is obtained when the grating is exchanged for one with a slit

separation ?

A

B

C

D (Total 1 mark)


Q23.Interference maxima produced by a double source are observed at a distance of 1.0 m from the sources. In which one of the following cases are the maxima closest together?

A red light of wavelength 700 nm from sources 4.0 mm apart

B sound waves of wavelength 20 mm from sources 50 mm apart

C blue light of wavelength 450 nm from sources 2.0 mm apart

D surface water waves of wavelength 10 mm from sources 200 mm apart (Total 1 mark)

Q24.A stationary wave is formed by two identical waves of frequency 300 Hz travelling in opposite directions along the same line. If the distance between adjacent nodes is 0.60 m, what is the speed of each wave?

A 180 m s−1

B 250 m s−1+

C 360 m s−1

D 500 m s−1

(Total 1 mark)

Q25.By approximately how many times is the wavelength of audible sound waves greater than the wavelength of light waves?

A 102

B 106

C 1010

D 1014

(Total 1 mark)

Q26. A rail truck X travels along a level track and collides with a stationary truck Y. The two trucks move together at the same velocity after the collision.


Which line, A to D, in the table states how the total momentum and the total kinetic energy of the trucks change as a result of the impact.

total momentum total kinetic energy

A unchanged unchanged

B unchanged decreases

C decreases decreases

D decreases unchanged

(Total 1 mark)

Q27.

In a double slit system used to produce interference fringes, the separation of the slits is s and the width of each slit is x. L is a source of monochromatic light. Which one of the following changes would decrease the separation of the fringes seen on the screen?

A moving the screen closer to the double slits


B decreasing the width, x, of each slit, but keeping s constant

C decreasing the separation, s, of the slits

D exchanging L for a monochromatic source of longer wavelength (Total 1 mark)

Q28. Water of density 1000 kg m–3 flows out of a garden hose of cross-sectional area 7.2 × 10–4 m2 at a rate of 2.0 × 10–4 m3 per second. How much momentum is carried by the water leaving the hose per second?

A 5.6 × 10–5 N s

B 5.6 × 10–2 N s

C 0.20 N s

D 0.72 N s (Total 1 mark)

Q29.The sound quality of a portable radio is improved by adjusting the orientation of the aerial. Which statement is a correct explanation of this improvement?

A The radio waves from the transmitter are polarised.

B The radio waves from the transmitter are unpolarised.

C The radio waves become polarised as a result of adjusting the aerial.

D The radio waves become unpolarised as a result of adjusting the aerial. (Total 1 mark)

Q30. In parts (i) and (ii) circle the letter that corresponds to the correct answer.

(i) The resistance of a negative temperature coefficient (ntc) thermistor

A increases as temperature increases.

B is constant at temperatures below 0 °C.


C increases as temperature decreases.

D falls to zero when a critical temperature is reached. (1)

(ii) The unit of potential difference can be expressed as

A C s–1

B J C–1

C V A–1

D J A–1

(1) (Total 2 marks)

Q31. Which row, A to D, in the table correctly shows the quantities conserved in an inelastic collision?

mass momentum kinetic energy total energy

A conserved not conserved conserved conserved

B not conserved conserved conserved not conserved

C conserved conserved conserved conserved

D conserved conserved not conserved conserved

(Total 1 mark)

Q32. The graph shows the variation with time, t, of the force, F, acting on a body.


What physical quantity does the area X represent?

A the displacement of the body

B the acceleration of the body

C the change in momentum of the body

D the change in kinetic energy of the body (Total 1 mark)

Q33. Which one of the following statements is correct?

The force acting on an object is equivalent to

A its change of momentum.

B the impulse it receives per second.

C the energy it gains per second.

D its acceleration per metre.

(Total 1 mark)

Q34. The graph shows how the force on a glider of mass 2000 kg changes with time as it is launched from a level track using a catapult.


Assuming the glider starts at rest what is its velocity after 40 s?

A 2.5 m s–1

B 10 m s–1

C 50 m s–1

D 100 m s–1

(Total 1 mark)

Q35. A gas molecule of mass m in a container moves with velocity v. If it makes an elastic collision at right angles to the walls of the container, what is the change in momentum of the molecule?

A zero

B mv

C mv

D 2 mv (Total 1 mark)


M1.A [1]

M2.D [1]

M3.C [1]

M4.D [1]

M5.B [1]

M6.C [1]

M7.A [1]

M8. B


[1]

M9.B [1]

M10.D [1]

M11.A [1]

M12.C [1]

M13.D [1]

M14.D [1]

M15.C [1]


M16.A [1]

M17.C [1]

M18.B [1]

M19.A [1]

M20.C [1]

M21.D [1]

M22.D [1]


M23.A [1]

M24.C [1]

M25.B [1]

M26. B [1]

M27.A [1]

M28. B [1]

M29.A [1]


M30. (i) C

B1 1

(ii) B

B1 1

[2]

M31. D [1]

M32. C [1]

M33. B [1]


M34. C [1]

M35. D [1]

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