No questions found
For which purpose is a micrometer screw gauge suitable?
558
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569
The graph shows how the speed of a car varies with time at the start of a journey.
Which distance-time graph represents the motion of the car over the same time period?
548
546
548
Which statement about mass and weight is correct?
592
525
530
Which substance in the table has the lowest density?
[Table_1]
516
550
569
The diagram shows a uniform bar resting on two supports, P and Q.
The weight of the bar is 4.0 N.
What is the force exerted on the bar by support P?
591
523
504
A spring, which obeys Hooke's law, has an unstretched length of 10 cm.
A load of 20 N is suspended from the spring.
The new length of the spring is 36 cm.
What is the spring constant $k$ of the spring?
588
526
518
A cricket ball has a mass of 0.16 kg. The ball travels at 30 m/s. The ball is hit by a bat with a force of 10 800 N. After being hit, the ball moves off at 30 m/s in the opposite direction.
For how long was the ball in contact with the bat?
580
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566
Electrical energy may be obtained from nuclear fission.
In which order is the energy transferred in this process?
557
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571
Which energy resource has the Sun as its only source of energy?
548
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546
A man, attached to an elastic cord, jumps from a platform. He falls 60 m before starting to rise. The length of the unextended cord is 30 m.
The diagrams show four successive stages in his fall.
In which position is elastic (strain) energy and kinetic energy present?
592
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544
The diagram shows three glass containers.
All three contain water filled to the same vertical height $h$.
The base area of P is equal to the base area of R.
The base area of Q is larger than the other two.
Students are asked to compare the water pressure at the bottom of each container.
Student 1 says that the pressure at base R is more than the pressure at base P.
Student 2 says that the pressure at base Q is less than the pressure at base P.
Student 3 says that the pressures at all three bases are the same.
Which students are correct?
567
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522
A liquid is evaporating. The liquid is not boiling. Which statement about the liquid is correct at an instant in time?
502
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554
The same mass of a gas is trapped in four identical cylinders by a piston that can move.
The diagrams show the samples of gas in different conditions of volume and temperature.
Which list gives the pressure of the gas in order from lowest to highest?
587
591
591
An aluminium block has a mass of 200 g. The specific heat capacity of aluminium is 900 J/(kg°C). How much energy is needed to increase the temperature of the block from 20°C to 110°C?
512
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587
A solid and a gas are each given the same increase in temperature. The gas is kept at a constant pressure.
Which row is correct?
[Table_1]
515
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593
The diagram shows a pan used for cooking food.
Which row is correct for the materials used to make the base and the handle of the pan?
540
588
516
In the diagram, the mountaineer can hear the stream although he cannot see it. When he is closer to the gully, he can both hear and see the stream. When he is further from the gully, he can neither hear nor see the stream.
Which statement is not correct?
557
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555
Which row correctly defines the frequency and the speed of a wave? [Table_1]
543
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552
A ray of light travels from air into a glass block.
[Table_1]
Three suggestions as to how the refractive index of glass $n$ may be calculated are listed.
1 $\qquad n = \frac{v_a}{v_g}$
2 $\qquad n = \frac{\lambda_a}{\lambda_g}$
3 $\qquad n = \frac{f_a}{f_g}$
Which suggestions are correct?
513
592
515
The diagram shows a ray of light in air incident on a glass block. Some of the light is refracted and some of the light is reflected. Two angles, $p$ and $q$, are marked on the diagram.
Which row gives the angle of incidence and states whether total internal reflection occurs?
[Table_1]
587
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560
A photographer sees his image as shown.
What could X be?
510
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573
The Sun emits infrared radiation and light.
Light from the Sun reaches the Earth in 8 minutes.
Which row gives correct information about the infrared radiation?
[Table_1]
503
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547
Which row gives the typical values of the speed of sound at room temperature in the materials stated?
[Table_1]
585
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534
A stationary, charged particle is in a field.
Which fields can cause there to be a force on this particle due to its charge?
1 gravitational field
2 magnetic field
3 electric field
565
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578
An electric current in a copper wire is due to the flow of charge.
Which particles are moving along the wire?
529
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568
The diagram shows a circuit containing two resistors of resistance 1.0\( \Omega \) and 2.0\( \Omega \).
A voltmeter is connected across the 1.0\( \Omega \) resistor by connecting P to X.
The reading on the voltmeter is 6.0V.
P is moved to point Y in the circuit.
What is the new reading on the voltmeter?
548
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575
Which graph shows the current–voltage characteristic for a filament lamp?
563
570
531
The diagrams show pairs of circuits containing logic gates.
In which diagram does the lower circuit of the pair behave differently from the upper circuit?
581
518
596
Two 3.0Ω resistors and one 6.0Ω resistor are connected in series with a cell. Which statement is correct?
553
529
599
Two resistors, with resistances $R_1$ and $R_2$, are connected in parallel. The resistance $R_1$ is greater than the resistance $R_2$.
What is the resistance of the parallel combination?
566
552
532
Circuit breakers and fuses are devices used to protect a circuit from overloading. Which statement correctly describes the difference between a circuit breaker and a fuse?
552
587
502
Electrical energy is transferred by transmission lines at high voltage. Which statement explains why a high voltage is used?
511
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577
Which diagram shows the magnetic field around a straight, current-carrying wire?
548
593
511
The coil in a d.c. motor is connected to a split-ring commutator.
What is the purpose of the split-ring commutator?
581
581
556
The nucleus of an americium atom contains 146 neutrons and 95 protons. It decays by emitting an $\alpha$-particle.
How many neutrons and how many protons remain in the nucleus when this form of americium decays?
[Table_1]
540
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583
The half-life for lead-202 is 52 500 years. A sample of lead-202 produces 800 counts/s.
How long will it take for the count rate to drop to 100 counts/s?
526
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528
Oxygen-15 is used in hospitals. The count rate from a detector placed close to a sample of oxygen-15 was recorded over a period of 15 min. The background count rate is 20 counts/min. What is the half-life of this sample of oxygen-15?
585
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Of the three types of ionising radiation, \( \alpha \), \( \beta \) and \( \gamma \), why does \( \alpha \)-emission cause the most ionisation?
500
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599
