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ZIMSEC O Level · 5055/1 · N2016

Physics Paper 1 November 2016

Questions
37
Time allowed
60 min
Syllabus code
5055/1

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Questions
37
Pass mark
23
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Answer every question in the printed order, get marked at the end, then see the answers.

The questions

Question 1

Measurement
What instrument is used to measure velocity at an instant?
  1. Aspeedometer
  2. Bodometer
  3. Cclock
  4. Dc.r.o

Question 2

Measurement

The diagram shows a measurement on a vernier callipers.

The reading shown is

  1. A5.55 cm.
  2. B5.56 cm.
  3. C5.60 cm.
  4. D6.00 cm.

Question 3

Thermal physics

A uniform metal rod is heated evenly along its length.

Which statement is correct?

  1. AIts mass decreases.
  2. BIts mass increases.
  3. CIts density decreases.
  4. DIts density increases.

Question 4

Motion
The acceleration of an object falling with terminal velocity is
  1. Azero.
  2. Bconstant.
  3. Cdecreasing.
  4. Dincreasing.

Question 5

Deformation

Objects of different masses were hung on a spring as shown.

What is the length, ll, if the spring obeys Hooke's law?

  1. A15 cm
  2. B21 cm
  3. C30 cm
  4. D36 cm

Question 6

Forces
Which statement about the effect of a force on an object is incorrect?
  1. AIt changes the mass of the object.
  2. BIt changes the length of the object.
  3. CIt changes the shape of the object.
  4. DIt changes the direction of the motion of the object.

Question 7

Forces

The diagram shows two forces acting on an object.

What is true about the motion of the object?

  1. Aspeed is 2 ms−1\mathrm{ms^{-1}}
  2. Bspeed is 4 ms−1\mathrm{ms^{-1}}
  3. Cacceleration is 2 ms−2\mathrm{ms^{-2}}
  4. Dacceleration is 4 ms−2\mathrm{ms^{-2}}

Question 8

Forces

The diagram shows a man who supports a mass of 30 kg.

What is the resultant force acting on the mass?

  1. A0 N
  2. B10 N
  3. C30 N
  4. D300 N

Question 10

Energy

In a nuclear power station, 0.25 kg of uranium was all changed into nuclear energy.

What was the amount of energy produced?

[the speed of light is 3.0×1083.0 \times 10^{8} m/s]

  1. A2.25×10182.25 \times 10^{18} J
  2. B2.25×10162.25 \times 10^{16} J
  3. C7.50×10107.50 \times 10^{10} J
  4. D7.50×1077.50 \times 10^{7} J

Question 11

Energy

A boy slides down a rough plane from a point of rest P to stop at point Q.

The energy changes for the boy between P and Q are

  1. Apotential → heat → kinetic.
  2. Bpotential → kinetic → heat.
  3. Ckinetic → potential → heat.
  4. Dkinetic → heat → potential.

Question 12

Work, energy and power

The diagram shows an electrically powered elevator used to lift bales of cotton into a truck. The elevator takes 30 s to lift one bale of mass 200 kg into the truck (g=10 ms−2g = 10\ \mathrm{ms^{-2}}).

What is the power developed by the elevator?

  1. A267 W
  2. B167 W
  3. C100 W
  4. D67 W

Question 13

Thermal physics
Which force must be overcomed when ice changes from solid to liquid?
  1. AThe force between electrons and nucleus.
  2. BThe force between the atoms in a molecule.
  3. CThe force between molecules.
  4. DThe force of gravity.

Question 14

Thermal physics
Which statement about evaporation is true?
  1. AEvaporation takes place only within the liquid.
  2. BEvaporation takes place only at a fixed temperature.
  3. CEvaporation takes place only at the surface.
  4. DEvaporation takes place only at a fixed pressure.

Question 15

Thermal physics
Which design features should a clinical thermometer have?
  1. Athick glass bulb and a narrow bore
  2. Bthick glass bulb and a wide bore
  3. Cthin glass bulb and a narrow bore
  4. Dthin glass bulb and a wide bore

Question 18

Waves
The speed of a water wave is best described by the distance
  1. Abetween successive troughs.
  2. Bbetween crest and trough.
  3. Ca particle moves up and down in one second.
  4. Da wave front moves in one second.

Question 19

Waves
Which row is correct about wave speed and frequency when a wave moves from a deep end to a shallow end?
  1. Afrequency changes; speed changes
  2. Bfrequency changes; speed unchanged
  3. Cfrequency unchanged; speed changes
  4. Dfrequency unchanged; speed unchanged

Question 20

Sound

A ship transmits ultrasonic waves into the sea of depth 2 500 m and receives an echo 5 seconds later.

What is the speed of ultrasonic sound in water?

  1. A250 ms−1\mathrm{ms^{-1}}
  2. B330 ms−1\mathrm{ms^{-1}}
  3. C500 ms−1\mathrm{ms^{-1}}
  4. D1000 ms−1\mathrm{ms^{-1}}

Question 21

Waves

The diagram shows how displacement varies with time as the wave passes a fixed point.

What is the frequency of this wave?

  1. A0.25 Hz
  2. B0.50 Hz
  3. C1.0 Hz
  4. D2.0 Hz

Question 22

Light

The diagram shows four rays of light from a torch below the surface of water.

Which angle, A, B, C or D, is the critical angle?

  1. AA
  2. BB
  3. CC
  4. DD

Question 23

Light

The diagram shows an optical fibre.

Which statement best explains why the ray is trapped in the fibre?

  1. AThe refractive index of the core is zero.
  2. BThe refractive index of the core equals that of the cladding.
  3. CThe refractive index of the core is less than that of the cladding.
  4. DThe refractive index of the core is greater than that of the cladding.

Question 24

Electricity
An electrical quantity defined as "the energy converted by a source in driving a unit charge round a complete circuit" is the
  1. Acurrent.
  2. Belectromotive force.
  3. Cpotential difference.
  4. Dpower.

Question 25

Electricity
Which graph shows how the resistance of a thermistor changes with temperature?
  1. AA
  2. BB
  3. CC
  4. DD

Question 26

Electricity

The diagram shows a carbon resistor.

What is the resistance of the resistor?

  1. A22 Ω\Omega
  2. B220 Ω\Omega
  3. C2 200 Ω\Omega
  4. D22 000 Ω\Omega

Question 27

Electricity
How much charge flows through a 100 W heater when 10 A is allowed to flow for 5 minutes?
  1. A0.5 C
  2. B2 C
  3. C50 C
  4. D3 000 C

Question 28

Electricity
Which graph shows how the current changes when the voltage across an ohmic conductor is varied?
  1. AA
  2. BB
  3. CC
  4. DD

Question 29

Electrical safety
Which is the best switch position in order to turn off both lamps?
  1. AA
  2. BB
  3. CC
  4. DD

Question 30

Electrical safety
Which statement about an electrical appliance with double insulation is correct?
  1. AIt has no earth wire connected.
  2. BIt has an earth wire connected.
  3. CIt has a metal casing.
  4. DIt has high risk of shock.

Question 31

Electrical safety
Overheating in electrical cables can be minimised by using
  1. Athinner cables.
  2. Bthicker cables.
  3. Cthinner insulation.
  4. Dthicker insulation.

Question 32

Electricity

An electric heater is rated 3 kW. Electrical energy costs 0.1 c per kWh.

What is the cost of using the heater for 5 hours?

  1. A0.5 c
  2. B1.5 c
  3. C15 c
  4. D150 c

Question 33

Magnetism

The diagram shows a solenoid connected to a constant d.c supply.

Which statement about end P is correct?

  1. AIt is positive.
  2. BIt is negative.
  3. CEnd P is the north pole.
  4. DEnd P is the south pole.

Question 34

Electromagnetism

The diagram shows a transformer.

Which statement, about the transformer, is correct?

  1. AThe input is direct current.
  2. BThe input current is greater than the output current.
  3. CThe input current is less than the output current.
  4. DThe input current is the same as the output current.

Question 35

Electrostatics
Which particle does not experience a force in an electric field?
  1. Aneutron
  2. Bproton
  3. Celectron
  4. Dalpha particle

Question 36

Electronics

The diagram shows an electron beam tube.

Which change in voltage results in the position of the spot on the screen moving towards the top?

  1. Adecreasing V1V_1
  2. Bdecreasing V2V_2
  3. Cincreasing V1V_1
  4. Dincreasing V2V_2

Question 37

Electronics

The diagram shows a logic gate.

The logic gate is

  1. AOR.
  2. BNOR.
  3. CNAND.
  4. DAND.

Question 38

Radioactivity

The radioactive nucleus, 88226Ra^{226}_{88}\mathrm{Ra}, decays with the emission of a β\beta particle.

How many protons and neutrons are left in the nucleus?

  1. A88 protons, 137 neutrons
  2. B88 protons, 138 neutrons
  3. C89 protons, 137 neutrons
  4. D89 protons, 226 neutrons

Question 39

Radioactivity
The count-rate from a radioactive source of half-life 1.0 minutes falls from 400 to 50 in
  1. A13\frac{1}{3} minutes.
  2. B1 minute.
  3. C3 minutes.
  4. D8 minutes.

Question 40

Radioactivity

The diagram shows apparatus to determine the thickness of paper.

A source of alpha-particles is not suitable because alpha particles

  1. Aare all stopped by the paper.
  2. Bare too dangerous to those working nearby.
  3. Chave a short half-life.
  4. Dmake the paper radioactive.

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