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The times for 10 swings of a pendulum are measured.
[Table_1]
What is the average time for one swing?
573
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580
A car starts from rest. The table shows the readings from its speedometer every 10 s.
[Table_1]
Which row describes the car’s motion in the first 30 seconds and in the last 30 seconds?
585
551
599
A stone is placed on a balance as shown.
Which row gives the mass and weight of the stone?
545
548
505
The diagram shows the dimensions of a solid rectangular block of metal of mass $m$.
Which expression is used to calculate the density of the metal?
597
561
555
A force $F$ acts on an object at a distance $x$ from a pivot. Which two changes both increase the moment of the force about the pivot?
506
577
596
The diagrams represent the only two forces acting on an object.
Which object could be moving to the right at constant speed?
560
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600
The diagram shows a uniform rod with its midpoint on a pivot. Two weights X and Y are hung from the rod. The rod is in equilibrium.
Which statement is correct?
597
597
568
Brakes are used to slow down a moving car. Into which form of energy is most of the kinetic energy converted as the car slows down?
576
530
535
What is a disadvantage of nuclear fission as a source of energy?
598
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598
The statements describe what happens when the power of a machine is increased.
1. The work done in a given time decreases.
2. The work done in a given time increases.
3. The time taken to do a given quantity of work decreases.
4. The time taken to do a given quantity of work increases.
Which statements are correct?
554
520
548
Which quantities, in addition to the acceleration of free fall $g$, affect the pressure at the bottom of a pond of water?
540
567
571
A fixed mass of gas is trapped in a container. The temperature of the gas is increased but the volume of the gas is kept constant.
How does this change affect the average kinetic energy of the molecules and the pressure on the walls of the container?
[Table_1]
562
526
546
Which row correctly describes the arrangement and the motion of particles in a solid?
[Table_1]
598
540
580
What is the temperature difference between the fixed points on the °C temperature scale?
555
500
528
In the diagram, each box represents a state of matter and each arrow represents a change of state.
Which row correctly identifies the changes of state?
516
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555
Four thermometers, with their bulbs painted different colours, are placed at equal distances from a radiant heater.
Which thermometer shows the slowest temperature rise when the heater is first switched on?
524
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517
Which method of transfer of thermal energy is caused by changes in density?
573
547
597
The diagrams show two sets of wavefronts in a ripple tank.
A student makes two statements about the waves.
1. When the waves reflect from the barrier the direction changes but the wavelength remains the same.
2. When the waves refract as they enter the shallow water the direction remains the same, but the wavelength changes.
Which statements are correct?
514
584
600
What is the correct order of the colours in a spectrum of white light?
577
570
564
An object is placed 30 cm in front of a plane mirror. Which statement describes the image of the object?
550
542
566
A ray of light is shone onto the surface of a mirror. Which two angles represent the angle of incidence and the angle of reflection?
590
570
552
The diagram shows the electromagnetic spectrum. The numbers indicate the approximate wavelength at the boundaries between the various regions of the spectrum.
For a device to be able to make use of electromagnetic radiation, it needs an aerial of approximately the same size as the wavelength of the radiation it is designed to work with.
Which statement is correct?
551
532
504
Microwaves and X-rays are regions of the electromagnetic spectrum. Which statement about microwaves and X-rays is correct?
597
527
583
An observer stands at the finish line of a 100 m race. He wants to time the winner's run. He starts his stop-watch as soon as he sees the smoke from the starting gun instead of when he hears the bang.
What is the reason for doing this?
504
505
502
Which description of a current in a metal is correct?
587
592
568
The diagram shows a circuit containing a variable resistor connected to a variable power supply.
The table shows the currents for different values of the potential difference (p.d.) and the resistance.
[Table_1]
What is the order of the currents from smallest to largest?
506
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570
The e.m.f. of the cell in this circuit is 1.5 V.
What does e.m.f. stand for?
540
519
562
A negatively charged plastic rod P is placed above a positively charged plastic rod Q.
What are the directions of the electrostatic forces on rod P and on rod Q?
581
599
563
A student finds the resistance of a resistor.
Which circuit is used to measure the potential difference (p.d.) across the resistor and the current in it?
570
599
597
The circuit diagram shows a variable potential divider.
The slider is moved from P towards Q.
What happens to the reading on the voltmeter and to the brightness of the lamp?
[Table_1]
576
600
515
The diagram shows a circuit containing a cell, a variable resistor and two bulbs, P and Q.
The resistance of the variable resistor is increased. What happens to the brightness of each bulb?
510
502
571
Which diagram shows a circuit containing a battery, a fuse and a buzzer?
530
506
507
Why is a fuse used in an electric circuit?
527
559
533
The diagram represents a transformer.
Which row shows materials suitable for making the core and the primary coil?
[Table_1]
542
520
553
The diagrams show the magnetic field lines around a wire carrying a current, $I$.
Which diagrams are correct?
541
572
555
A wire is placed between the poles of a magnet.
Which statements are correct?
1. An a.c. current in the wire causes a changing force on it.
2. A downward d.c. current in the wire causes a constant force on it.
3. An upward d.c. current in the wire causes a constant force on it.
545
579
560
The nuclide notation for the isotope lithium-7 is $^7_3\text{Li}$.
How many neutrons are there in an atom of lithium-7?
549
503
505
A radioactive material is emitting $\alpha$-particles. The radioactive material is used in a demonstration in a school laboratory experiment.
Which safety precaution must be taken by the person carrying out the experiment?
537
535
550
The graph shows how the count rate from a radioactive isotope changes with time.
[Image_1: Graph of count rate against time]
What is the half-life of this isotope?
509
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559
A student measures the count rate near a radioactive source using a detector of ionising radiation. The diagram shows the arrangement.
The counter reads 75 counts per minute.
When the source is taken away, the reading on the counter decreases to 5 counts per minute.
What was the rate of emission from the radioactive source when the counter reading is corrected for background radiation?
519
518
593
