0625_w05_qp_2
A paper of Physics, 0625
Questions:
12
Year:
2005
Paper:
2
Variant:
0
Login to start this paper & get access to powerful tools
2
Palm trees are growing every 25 m alongside the highway in a holiday resort. The IGCSE school bus drives along the highway. It takes 2 s for the bus to travel between palm tree 1 and palm tree 2. Calculate the average speed of the bus between tree 1 and tree 2. average speed = It takes more than 2 s for the bus to travel from tree 2 to tree 3. State what this information indicates about the speed of the bus. The speed of the bus continues to do what you have said in . State how the time taken to go from tree 3 to tree 4 compares with the time in . The time taken to travel from tree 3 to tree 4 is the time to travel from tree 2 to tree 3. IGCSE Use
1. Motion, forces and energy  →  1.2. Motion
6. Space physics  →  6.1.2. The Solar System
Open
4
A man is delivering a cupboard to a house. The man rolls the cupboard at a steady speed from the lorry to the house. The friction force in the wheels is 40 N. State the force with which the man has to push. force = N The cupboard weighs 720 N. State the smallest force needed to lift the cupboard. force = N The step is 0.20 m high. Calculate the work required to lift the cupboard onto the step. work required = The man has to ask his assistant to help him lift the cupboard onto the step. Together, they lift it onto the step in 1.2 s. The men work equally hard. Calculate the power developed by each man. power developed = step wheels house Use
1. Motion, forces and energy  →  1.7.2. Work
1. Motion, forces and energy  →  1.7.4. Power
Open
5
The apparatus shown in is set up in a laboratory during a morning science lesson. Later in the day, the room temperature is higher than in the morning. What change is observed in the apparatus? Explain why this change happens. Suggest one disadvantage of using this apparatus to measure temperature. flask air tube clamp water Use
2. Thermal physics  →  2.1.3. Gases and the absolute scale of temperature
2. Thermal physics  →  2.2.3. Melting, boiling and evaporation
2. Thermal physics  →  2.2.2. Specific heat capacity
Open
6
shows a reed relay being used to switch on an electric motor when a variable resistor is adjusted. The variable resistor is set at its greatest resistance and then switch S is closed. The reeds in the reed relay do not close when this is done. State two things that happen in the coil of the reed relay. 1. 2. State what happens to the two reeds in the reed relay. The resistance of the variable resistor is slowly decreased. The reeds in the reed relay close. shows how the current in the coil changes with time. On , draw a line that might show how the current in the motor changes with time as the variable resistor is adjusted. current in motor time current in coil time M + S reed relay power supply variable resistor – Use
4. Electricity and magnetism  →  4.5.5. The d.c. motor
4. Electricity and magnetism  →  4.3.3. Action and use of circuit components
Open
7
The filament of a lamp is placed at the principal focus of a lens, as shown in . On , continue the three rays through the lens and out into the air on the right of the lens. The lens in has a focal length of 2.0 cm. On , mark and label the positions of the principal focus on the left of the lens and the principal focus on the right of the lens, carefully draw a ray from the top of the object, parallel to the axis, through the lens and continue it until it reaches the edge of the squared area, carefully draw a ray from the top of the object, which travels parallel to the axis after it has passed through the lens, draw and label the image. 1 cm 1 cm object Use
3. Waves  →  3.2.3. Thin lenses
3. Waves  →  3.2.2. Refraction of light
Open
8
Two magnets are laid on a bench. End A of an unidentified rod is held in turn above one end of each magnet, with the results shown in . Suggest what the unidentified rod is made from. State what, if anything, happens when the end A is held over one end of 1. an unmagnetised iron bar, 2. an uncharged plastic rod. shows four identical plotting compasses placed around a bar magnet where the magnetic field of the surroundings can be ignored. The pointer has only been drawn on one plotting compass. On , draw the pointers on the other three plotting compasses to indicate the directions of the magnetic field of the bar magnet in those three places. S N A N S A S N south pole lifted off bench bench north pole lifted off bench Use
4. Electricity and magnetism  →  4.1. Simple phenomena of magnetism
Open
9
shows five circuit symbols and their names. The names are in the wrong order. Draw a straight line from each symbol to its name. One line has been drawn as an example. shows a circuit. ammeter 1 switch lamp 2 ammeter 2 cell lamp 1 1.5 V V A cell lamp ammeter voltmeter switch Use In the space below, draw the circuit using circuit symbols. On your diagram in , add a voltmeter connected to measure the potential difference across the cell. When the switch is pressed so that the contacts join, which of the lamps light up? When there is a current in the circuit, ammeter 1 reads 0.5 A. What current does ammeter 2 read? current = A One lamp “blows”, so that its filament breaks. What happens in the circuit? Examiner's Use
4. Electricity and magnetism  →  4.3.1. Circuit diagrams and circuit components
4. Electricity and magnetism  →  4.2.4. Resistance
Open
11
shows a tube for producing cathode rays. The tube contains various parts. A spot is formed on the screen by the cathode rays. What do cathode rays consist of? Which part, A, B, C or D, must be heated to create the cathode rays? Which part, A, B, C or D, is coated with fluorescent material? What is the purpose of the fluorescent material? A potential difference is applied between the two halves of part C. What effect does this have on the cathode rays? Explain why there needs to be a vacuum inside the tube. A B C D Use
5. Nuclear physics  →  5.2.4. Half-life
3. Waves  →  3.2.3. Thin lenses
2. Thermal physics  →  2.3.3. Radiation
Open
12
State what is meant by the half-life of a radioactive substance, background radiation. In a certain laboratory, the background radiation level is 25 counts/minute. is a graph of the count-rate measured by a detector placed a short distance from a radioactive source in the laboratory. time / min count-rate counts / min Use At zero time, the measured count-rate of the source and background together is 80 counts/minute. Calculate the count-rate due to the source alone. count-rate due to source = counts/min After one half-life has elapsed, what is the count-rate 1. due to the source alone, count-rate due to source = counts/min 2. measured by the detector? count-rate measured by detector = counts/min Use the graph to find the half-life of the source. half-life of source = min Why does the graph not drop below the 25 counts/minute line? On , sketch the curve that might be obtained for a source with a shorter half-life. Examiner's Use
5. Nuclear physics  →  5.2.1. Detection of radioactivity
5. Nuclear physics  →  5.2.4. Half-life
Open