0625_s11_qp_22
A paper of Physics, 0625
Questions:
12
Year:
2011
Paper:
2
Variant:
2
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1
The volume of a stone is to be found using the equipment illustrated in . stone measuring cylinder water The following five steps are intended to describe how the volume of the stone is found. Complete the sentences by adding appropriate words. Pour some into the measuring cylinder. Take the reading of the from the scale on the measuring cylinder. Carefully put into the measuring cylinder. Take the new reading of the from the scale on the measuring cylinder. Calculate the volume of the stone by
1. Motion, forces and energy  →  1.1. Physical quantities and measurement techniques
1. Motion, forces and energy  →  1.4. Density
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4
shows how the speed of an object varies during a period of 30 s. speed m / s time / s State the speed of the object at the start of the 30 s, speed = m / s at the end of the 30 s. speed = m / s Describe what is happening to the speed during the period 0 s – 10 s, 10 s – 25 s, 25 s – 30 s. Determine the distance travelled in the last 5 s. distance = m The total distance travelled in the 30 s is 750 m. Calculate the average speed of the object during the 30 s. average speed = m / s
1. Motion, forces and energy  →  1.2. Motion
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5
shows a girl looking at her reflection in a mirror on the wall. The reflecting surface of the mirror is the surface in contact with the wall. mirror reflecting surface On , put a small X where the image of the girl’s eye is positioned, carefully draw lines to find the lowest part of her body that she can see reflected in the mirror. Mark clearly the portion of her body that she cannot see. A helicopter is hovering over a harbour. The pilot can see the waves arriving from out at sea. The waves hit the harbour wall at an angle, as shown in . harbour wall (seen from the air) incoming water waves The waves are reflected when they hit the harbour wall. Carefully complete to show the reflected parts of the first two waves to hit the wall.
3. Waves  →  3.1. General properties of waves
3. Waves  →  3.2.1. Reflection of light
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6
The temperature of a block of iron is increased. State what happens to the energy of the atoms due to their vibrations, the average separation of the atoms, the density of the iron. When concrete roads are made, the concrete is laid in sections, with gaps between the sections. The gaps are then filled with a soft material, called pitch. This is shown in . concrete pitch Suggest why the concrete is laid in sections like this.
4. Electricity and magnetism  →  4.1. Simple phenomena of magnetism
2. Thermal physics  →  2.2.1. Thermal expansion of solids, liquids and gases
2. Thermal physics  →  2.2.3. Melting, boiling and evaporation
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8
The components in are connected in a circuit. A A R P Q Complete the following sentence. The components in the circuit of are connected in with each other. On , draw an arrow to show the direction of the conventional current in the circuit, a voltmeter connected to measure the potential difference across R. State the name of the component represented by this symbol: What is the purpose of this component in the circuit? The top ammeter reads 1.5 A. The voltmeter reads 6.0 V. State the reading of the bottom ammeter. A Calculate the resistance of R. resistance = A piece of low resistance wire is carelessly allowed to connect P and Q. State which component could be damaged when this happens.
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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9
State two advantages that electromagnets have, compared with permanent magnets. 1. 2. Tick one box in each of the columns below, to indicate what should be used to give the strongest electromagnet. column 1 number of turns on coil column 2 type of core column 3 current 1000 turns F 500 turns F 250 turns F air F plastic F iron F 3.0 A F 2.0 A F 1.0 A F
4. Electricity and magnetism  →  4.1. Simple phenomena of magnetism
4. Electricity and magnetism  →  4.5.3. Magnetic effect of a current
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10
A sportsman is feared to have broken a leg, and is taken to hospital to have his leg X-rayed. Complete the following sentence about X-rays. X-rays are a form of radiation that have very wavelengths. In the hospital, what is used to detect the X-rays and produce an image of the bones of the leg? Describe the properties of X-rays that enable an image to be produced, which distinguishes between bones and flesh. State one precaution taken by the technicians who operate the X-ray machines.
2. Thermal physics  →  2.3.3. Radiation
5. Nuclear physics  →  5.2.1. Detection of radioactivity
5. Nuclear physics  →  5.2.5. Safety precautions
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11
shows a tube for producing cathode rays, connected to two voltage supplies and switches. 12 V 1000 V S1 S2 filament cathode vacuum anode + – + – Which switch has to be closed in order to make the filament release electrons? Explain why closing the switch in makes the filament release electrons. What name do we give to this means of electron release? State and explain what will happen to the released electrons when both switches are closed.
4. Electricity and magnetism  →  4.2.2. Electric current
4. Electricity and magnetism  →  4.4. Electrical safety
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12
A radioactive source, which emits beta-particles, is used as shown in to detect whether cartons on a conveyor belt have the required volume of pineapple juice in them. IGCSE PINEAPPLE beta-particle emitting source fruit juice level carton belt travels this way conveyor belt to counter radiation detector narrow detecting slit State why an alpha-emitting source would not be suitable for this application. State why a gamma-emitting source would not be suitable for this application. The factory has a choice of two beta-emitting sources. source half-life barium-139 85 minutes strontium-90 28 years State, giving your reasons, which of these sources is the most suitable for this application. The equipment is set to give a reading of 200 counts / s when there is a carton with the correct amount of pineapple juice between the source and the detector. Tick the appropriate boxes to indicate what reading would be expected in each situation. reading more than 200 counts / s 200 counts / s less than 200 counts / s carton containing too little juice carton containing too much juice no carton at all
5. Nuclear physics  →  5.2.1. Detection of radioactivity
5. Nuclear physics  →  5.2.4. Half-life
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