0625_w18_qp_33
A paper of Physics, 0625
Questions:
12
Year:
2018
Paper:
3
Variant:
3
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1
shows a large tank containing water. The tank leaks. Drops of water fall from the tank. The drops hit the ground at a regular rate. 12 m tank water ground drops of water A student measures the time interval between two drops of water hitting the ground. She uses a stopwatch and repeats the procedure three times. shows each stopwatch reading. 0. . . 01 24 min s s 0. 01 14 min s s 0. 01 16 min s s . . . . time = s time = s time = s On the line below each stopwatch, state the time readings shown, in seconds. Calculate the average time interval between two drops of water hitting the ground. average time = s Another student measures the average time taken for a drop of water to fall from the tank to the ground. The time taken is 1.6 s. Calculate the average speed of this drop of water. average speed = m/s shows the speed-time graph for a different drop of water. 0.5 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 1.0 1.5 2.0 2.5 speed m / s time / s P Q Use to determine the distance fallen by the drop between P and Q. distance = m
1. Motion, forces and energy  →  1.2. Motion
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2
A student has a piece of metal that has an irregular shape. The weight of the metal is 3.0 N. Calculate the mass of the metal. mass = kg shows the piece of metal, a measuring cylinder and a beaker containing water. metal measuring cylinder beaker water Describe how to determine the volume of the metal, using the equipment in . Explain why the procedure in is not suitable for finding the volume of a piece of low-density wood that is of similar shape and size to the piece of metal in . The mass of another piece of metal is 405 g and its volume is 150 cm3. Calculate the density of the metal. State the unit. density =
1. Motion, forces and energy  →  1.4. Density
1. Motion, forces and energy  →  1.1. Physical quantities and measurement techniques
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4
In , each box represents a state of matter. Each arrow shows a change of state. Some labels are missing. liquid freezing boiling On , write the name of the state of matter in each of the empty boxes. On , on each unlabelled arrow, write the change of state that it represents. These statements are about particles in a liquid. Two statements are correct. Tick the boxes next to the two correct statements. The particles are in a regular pattern. The particles are as far apart as those in a gas. The particles are a similar distance apart to those in a solid. The particles vibrate about fixed positions. The particles move randomly.
2. Thermal physics  →  2.2.3. Melting, boiling and evaporation
2. Thermal physics  →  2.1.1. States of matter
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5
shows a transverse wave. Four distances A, B, C and D are marked on the wave. B A C D State the letter that shows the amplitude of the wave. State the meaning of the term frequency of a wave. A long spring is fixed at one end, as shown in . The spring is moved towards and away from the fixed end, repeatedly. The compressions and rarefactions on the spring at a particular time can be seen. direction of wave travel towards and away from fixed end fixed end 1 m 2 m 3 m 4 m tape measure State the type of wave in the spring. State one other example of this type of wave. Use the scale in to determine the wavelength of the wave in the spring. wavelength = cm
3. Waves  →  3.1. General properties of waves
1. Motion, forces and energy  →  1.5.1. Effects of forces
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6
shows a ray of green light hitting a glass prism. ray of green light normal screen On , label the angle of incidence for the ray, using the letter, i. On , complete the path of the ray of green light until it hits the screen. The ray of green light is replaced with a ray of white light. The white light splits into a spectrum of colours. State the term used to describe this effect. State the colour that is refracted most by the prism.
3. Waves  →  3.2.4. Dispersion of light
3. Waves  →  3.2.2. Refraction of light
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7
Some students make statements about sound. In each part of the question, only one statement is correct. Place a tick in the box next to each correct statement. Sound travels at the same speed as light. Sound travels faster than the speed of light. Sound travels slower than the speed of light. Healthy human ears can hear sounds in the range 2.0 Hz to 2000 Hz. Healthy human ears can hear sounds in the range 20 Hz to 20 000 Hz. Healthy human ears can hear sounds in the range 200 Hz to 200 000 Hz. Increasing the amplitude of a sound wave increases its speed. Increasing the amplitude of a sound wave increases its frequency. Increasing the amplitude of a sound wave increases its loudness. An echo is produced when sound is diffracted. An echo is produced when sound is refracted. An echo is produced when sound is reflected.
3. Waves  →  3.4. Sound
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8
shows a sheet of paper. A bar magnet is underneath the paper. A student sprinkles iron filings onto the paper. paper position of magnet under paper On • Label the position of each pole of the magnet. Use the label N for the north pole and S for the south pole. • Draw one magnetic field line above the magnet and draw one magnetic field line below the magnet. • Add one arrow to show the direction of the magnetic field. A student places a soft iron rod inside a coil of insulated wire. The coil is connected to a battery, as shown in . switch battery soft iron rod coil of insulated wire State the name given to the device shown in . The student puts one end of the device in just above a pile of iron filings. He closes the switch for a short time and then opens it again. Describe the effect this has on the iron filings. The student removes the soft iron rod and replaces it with a steel rod. He puts one end of the steel rod just above the pile of iron filings. He closes the switch for a short time and then opens it again. Describe the effect this has on the iron fillings.
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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9
shows a circuit with two lamps and three ammeters connected in series to a power supply. A2 A1 A3 The current shown on ammeter A1 is 0.6 A. Complete the table with the values for the current that would be shown on the other two ammeters. ammeter current / A A2 A3 The resistance of each lamp is 20 Ω. Determine the combined resistance of the lamps. resistance = Ω The circuit is changed. The two lamps are connected in parallel. Compare the current from the power supply with the current in each lamp. Compare the resistance of one lamp in this circuit with the combined resistance of the two lamps connected in parallel. A different series circuit contains a 140 Ω fixed resistor. An ammeter in the circuit shows a current of 0.30 A. Calculate the potential difference (p.d.) across the resistor. State the unit. potential difference =
4. Electricity and magnetism  →  4.3.2. Series and parallel circuits
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10
State the name of the component represented by the symbol . Describe its purpose. name purpose shows an electrical cooker hood used in some kitchens. fan driven by motor light The cooker hood removes steam from the kitchen. It has a fan driven by a motor. It also has a lamp. shows a simplified circuit diagram for the cooker hood. T S Z Y M State the type of electrical supply used by the cooker hood. Switch S is closed. Switch T is moved to position Y. State the name of any components that are switched on. Switch T is moved from position Y to position Z. Suggest how this change affects the motor. Electrical appliances with metal cases can become dangerous if there is a fault. Suggest a hazard and describe a safety feature to reduce the danger. hazard safety feature
4. Electricity and magnetism  →  4.4. Electrical safety
4. Electricity and magnetism  →  4.3.1. Circuit diagrams and circuit components
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11
shows a simple electric motor. N S W Z X Y brush contact There is a current in the coil WXYZ. The direction of this current is shown by the arrows. On , draw an arrow to show the direction of the force acting on side WX and an arrow to show the direction of the force acting on side YZ. State three ways of increasing the turning effect of the motor. 1. 2. 3. In a home, a step-down transformer reduces the mains voltage of 225 V to 4.5 V. The transformer has 4000 turns on the primary coil. Calculate the number of turns on the secondary coil. number of turns =
4. Electricity and magnetism  →  4.5.5. The d.c. motor
1. Motion, forces and energy  →  1.5.2. Turning effect of forces
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12
A nuclear power station uses uranium to generate thermal energy. The fuel for the power station is an isotope of uranium. Explain the meaning of the term isotope. When the nucleus of a uranium atom decays, it releases a β-particle. Describe the relative ionising effect, and the relative penetrating ability, of a β-particle. relative ionising effect relative penetrating ability A sample of rock includes some uranium-239. The half-life of uranium-239 is 23 minutes. Determine the fraction of the uranium-239 that remains after 46 minutes. fraction remaining =
5. Nuclear physics  →  5.2.4. Half-life
5. Nuclear physics  →  5.2.2. The three types of nuclear emission
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