0625_w13_qp_22
A paper of Physics, 0625
Questions:
12
Year:
2013
Paper:
2
Variant:
2
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1
For Examiner’s Use A slope is made by resting one end of a plank of wood on a block, as shown in . plank trolley Three students each use a digital stopwatch to time a small trolley rolling down the full length of the slope. The times on their stopwatches as the trolley reached the bottom of the slope are shown in . student 1 student 2 student 3 time = s time = s time = s min sec 1/100 min sec 1/100 min sec 1/100 On the line next to each stopwatch, write the time measured by each student. For Examiner’s Use Calculate the average time measured for the trolley to roll down the slope. Show your working. average time = s What other measurement must be taken in order to be able to calculate the average speed of the trolley? Suggest one change that might be made to the arrangement in so that the same trolley takes less time to roll down the full length of the slope.
1. Motion, forces and energy  →  1.2. Motion
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2
For Examiner’s Use A lorry travels at constant speed for 50 s and then steadily slows down, taking another 50 s to come to a stop. is the speed-time graph for the 100 s. time / s speed m / s Calculate the distance travelled by the lorry in the first 50 s. distance = m Calculate the distance travelled between 50 s and 100 s. distance = m Calculate the total distance travelled. distance = m For Examiner’s Use A car takes 60 s to travel the distance calculated in at a constant speed. Calculate the speed of the car. speed = On , draw the speed-time graph for the 60 s at this constant speed.
1. Motion, forces and energy  →  1.2. Motion
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4
For Examiner’s Use shows a boy in four positions on a flat floor. Put a tick in the box under the position where the boy is exerting the least pressure on the floor. State the reason for your answer to . The pressure of carbon dioxide in a container is being measured by means of a mercury manometer. This is shown in . carbon dioxide manometer mercury gas cylinder h How does the pressure of the carbon dioxide compare with atmospheric pressure? Complete the sentence below. The pressure of the carbon dioxide is the atmospheric pressure. The atmospheric pressure increases. State what happens to the value of the distance h, shown on .
1. Motion, forces and energy  →  1.8. Pressure
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5
For Examiner’s Use shows a wave on a water surface, at a particular instant. On , measure carefully, in mm, the wavelength of the wave. wavelength = mm State what is meant by the frequency of a wave, the amplitude of a wave. A large barrier, of height greater than the height of the wave in , is put in the path of the wave. What, if anything, does this do to the wave? Tick one box. It diffracts the wave. It does nothing to the wave. It reflects the wave. It refracts the wave.
3. Waves  →  3.1. General properties of waves
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6
For Examiner’s Use A certain mass of water at 20 °C is heated using a 30 W immersion heater. Initially the temperature rises at 4 °C per minute. Eventually, the temperature stops rising at 100 °C. The same mass of glycerol at 20 °C is heated using the same 30 W immersion heater. Initially the temperature rises at 8 °C per minute. Eventually, the temperature stops rising at 290 °C. State and explain which has the greater boiling point, water or glycerol, statement explanation which has the greater thermal capacity, the water or the glycerol. statement explanation shows a cross-section through a room. floor ceiling wall window metal case hot water For Examiner’s Use The room is heated by a heater containing hot water. The heater is mounted on one wall, as shown. By what process does thermal energy pass through the metal case of the heater in ? State the two main processes by which the thermal energy from the heater is transferred to the whole room. 1. 2. One of the processes in involves the air moving. On , draw arrows to show how the air moves in the room.
2. Thermal physics  →  2.3.4. Consequences of thermal energy transfer
2. Thermal physics  →  2.2.3. Melting, boiling and evaporation
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7
For Examiner’s Use shows circuit symbols for four electrical components. W X Y Z In the box next to each component, write the name of that component. In the space below, draw a circuit diagram that shows these four components connected in series with an ammeter. The reading on the ammeter is gradually increased. Which one of the components is adjusted in order to do this? Tick one box. W X Y Z
4. Electricity and magnetism  →  4.3.3. Action and use of circuit components
4. Electricity and magnetism  →  4.2.4. Resistance
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8
For Examiner’s Use An IGCSE Physics student is set a puzzle by his teacher. He is given four rods, A, B, C and D, all painted white. He is told that two rods are permanent magnets, another rod is made of iron and the final rod is made of copper. His teacher asks him to find out, by experiment, which rod is which. shows the results the student obtains when he puts the rods next to each other. A B repel A C attract B D no effect Which two rods are magnets? and Which is the iron rod? Which is the copper rod? What will be the result of putting B and C end to end, C and D end to end?
4. Electricity and magnetism  →  4.1. Simple phenomena of magnetism
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9
For Examiner’s Use shows a thick, vertical copper rod AB, of negligible resistance, connected into an electrical circuit. AB passes through a hole in a horizontal card PQRS. + – d.c. power supply 4 1 P S A B Q R The d.c. power supply produces a current in the circuit, which causes a magnetic field around AB. shows the view from above of the card PQRS, with the hole through which AB passes. P Q R S On , draw the pattern of the magnetic field around AB. Include at least four magnetic field lines. For Examiner’s Use Describe briefly how the pattern of the magnetic field may be shown experimentally. The d.c. power supply contains a circuit breaker that operates at a current of 5 A. What is the purpose of the circuit breaker? The power supply is set at 12 V and then switched on. The resistor has a resistance of 4 Ω. 1. Calculate the current in the circuit of . current = A 2. Deduce what, if anything, happens to the circuit breaker.
4. Electricity and magnetism  →  4.5.3. Magnetic effect of a current
4. Electricity and magnetism  →  4.5.4. Force on a current-carrying conductor
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10
For Examiner’s Use 10 shows a ray of light incident on a plane mirror at point A. mirror mirror ray of light A The construction in this question requires you to draw rays carefully. On , draw the normal to the mirror at A, draw the ray reflected at A, label the angles of incidence i and reflection r at A, using the letters i and r. Which of the following equations correctly links i and r? Tick one box. i + r = 90° i + r = 180° i = r A second mirror is positioned as shown in , parallel to the first mirror. Continue the ray reflected from A, to show what happens to it after it reaches the second mirror. State how the direction of the ray, after it has reflected from both mirrors, compares with its original direction.
3. Waves  →  3.2.1. Reflection of light
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11
For Examiner’s Use 11 Radon-220 is a radioactive gas. It decays by emitting α-particles. An α-particle is a helium nucleus. What four particles together make up an α-particle? Suggest one reason why the fact that radon-220 is a gas makes it potentially more dangerous than an α-emitting solid source of similar activity. In the situations illustrated in , the radioactive source is emitting α-particles, β-particles and γ-rays. The detector is sensitive to all three types of radiation. The apparatus is in air. D C A B radiation detector thick aluminium thick paper 1 cm 2 cm 15 cm 1 cm radioactive source (not to scale) Ignore background radiation. State one of the situations, A, B, C or D where α-particles are detected, only β-particles and γ-rays are detected, only γ-rays are detected, α-particles, β-particles and γ-rays are all detected.
5. Nuclear physics  →  5.2.1. Detection of radioactivity
5. Nuclear physics  →  5.2.2. The three types of nuclear emission
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