OCR GCE AS Level Physics A AS Paper 1 June 2022 question paper H156/01

Which of the following could be the wavelength of ultraviolet radiation?

3 × 10^–5 m A

1 × 10^–10 m B

4 × 10² m C

2 × 10^–7 m D

Which term is not used in either of Kirchhoff’s two laws?

A charge

B current

C electromotive force

D potential difference

The diagram below shows the refraction of light at the boundary between two transparent materials X and Y.

The refractive index of material X is 1.5 and the refractive index of material Y is n.

Which of the following expressions is correct?

A n × sin 70° = 1.5 × sin 50°

B n × sin 20° = 1.5 × sin 40°

C 1.5 × sin 70° = n × sin 50°

D 1.5 × sin 20° = n × sin 40°

A student is carrying out the Young double-slit experiment using visible light. The distance between the slits and the screen is kept constant. The wavelength of light is and the separation of the slits is a.

The following results are collected by the student.

	/ nm	a / mm
A	450	0.20
B	510	0.15
C	550	0.25
D	610	0.30

Which combination of λ and a will give the largest separation between the adjacent bright fringes?

A car of mass 1000 kg is travelling on a straight and horizontal road. The driver applies the brakes. The speed of the car decreases from 20 m s^–1 to 15 m s^–1 in 2.4 s. What is the average power dissipated by the brakes?

1.0 × 10³ W A

5.2 × 10³ W B

3.6 × 10⁴ W C

8.3 × 10⁴ W D

Two coherent waves are emitted from the sources X and Y.

The diagram is not to scale. The waves at X and Y are in phase. The waves have wavelength 4.0 cm. The phase difference of the two waves meeting at point P is 270°.

Which row gives possible distances for a and b?

A resistor of resistance 12 is connected in parallel with another resistor of resistance R. The total resistance of the circuit is 4.0 .

What is the value of R ?

A 0.17

B 6.0

C 8.0

D 16

A cell of electromotive force (e.m.f.) 1.2 V is connected to a wire of resistance 6.0 .

The potential difference across the wire is 0.90 V.

What is the internal resistance r of the cell?

A 0.15

B 0.30

C 2.0

D 8.0

A thin metal plate is free to rotate in the vertical plane about the point P. Four forces A, B, C and D act at the same point on the plate, as shown below.

The diagram above is drawn to scale. All the forces are in the vertical plane. The forces have the same magnitude but act in different directions.

Which force will produce the greatest moment about point P ?

An electric motor is used to lift a weight of 4.0 N through a vertical height of 0.90 m in 1.8 s. The efficiency of the motor is 20%.

What is the electrical power supplied to the motor?

A 0.40 W

B 2.0 W

C 3.6 W

D 10 W

Plane polarised light is incident perpendicular to a vertical polarising filter. The polarising filter is rotated about the horizontal axis.

Which property of the transmitted light changes as the filter is rotated?

A frequency

B intensity

C speed

D wavelength

A student balances a uniform metal rod horizontally.

The rod is pivoted at its middle. The position of weight W is kept constant. Th e distance of the weight F from the pivot is x. The student changes F and then adjusts x so that the rod remains balanced.

Which statement is correct?

A A graph of F against x will be a straight line through the origin.

B The upward force at the pivot is equal to F.

C The weight of W is equal to Fx.

D x is inversely proportional to F.

The photoelectric effect can be demonstrated using a gold-leaf electroscope. The zinc plate of the electroscope is negatively charged. Ultraviolet radiation incident on the zinc collapses the gold leaf.

What is removed from the zinc plate by the incident radiation?

A electrons

B ions

C photons

D protons

A student is experimenting with sound waves of wavelength 3.0 cm and electromagnetic waves also of wavelength 3.0 cm.

Which statement is correct about both of these waves?

A They can be polarised.

B They can form stationary waves.

C They have the same frequency.

D They have the same speed.

A laser emits a uniform beam of light.

What two quantities alone are required to calculate the intensity of the beam of light?

A amplitude, frequency

B cross-sectional area, power

C energy, time

D frequency, wavelength

Calculate the horizontal distance travelled by the buggy from t = 0 to t = 8.0 s.

At t = 1.0 s the buggy is accelerating.

At t = 1.0 s the tension T in the rope is 680 N and the total horizontal resistance acting on the buggy and person is R.

Calculate R by resolving the tension in the rope horizontally.

Describe how the force constant of the compression spring in the pogo stick can be verified in the laboratory.

Describe the energy changes taking place between positions B and C.

Calculate the maximum energy E stored in the compressed spring.

A student uses the following expression to determine the maximum speed v of the clown in position B: maximum energy E stored in the compressed spring = × 68 × v².

Explain why this expression is incorrect. You are not expected to do any calculations.

Two objects A and B are travelling horizontally and in opposite directions. The objects collide in mid-air at a height of 120 m above the horizontal ground, as shown below.

The mass of A is 2.0 kg and the mass of B is 3.0 kg.

After the collision the objects are joined together.

The momentum p against time t graphs for each object before, during and after the collision are shown below.

Explain how the graphs demonstrate Newton’s third law during the collision.

Use the graphs to show that momentum is conserved in the collision.

Calculate the magnitude of the horizontal velocity v of the combined objects immediately after the collision.

=........ m s^–1 v

Air resistance has negligible effect on the motion of the objects.

Calculate the time taken for the combined objects to reach the ground after the collision.

Stationary waves are formed on the surface of seawater in a harbour as incoming waves are reflected off the harbour wall.

An observer is looking at these stationary waves.

State how the observer can tell that these are stationary waves.

Suggest how the student may have determined the fundamental frequency of the oscillating wire in the laboratory.

Use the data in the table to determine

1 the wavelength of the progressive waves on the stretched wire

2 the speed of the progressive waves on the stretched wire

speed =........ m s^–1

3 the absolute uncertainty in the tension T. Write your answer to 2 significant figures.

Potential difference (p.d.) and electromotive force (e.m.f.) can both be defined in terms of transfer of energy per unit charge.

State one other similarity between p.d. and e.m.f.

Fig. 25.1 shows an electrical circuit.

The cell has e.m.f. 1.5 V and negligible internal resistance.

AB is a resistance wire of length L. The resistance of this wire is equal to the resistance R the fixed resistor. S is a sliding contact that can be moved on the resistance wire. The distance between A and S is x. The p.d. across the fixed resistor is V.

The distance x is changed by moving the slider from A to B.

On Fig. 25.2, show the variation of V with distance x.

The connecting wire BC is now removed. The rest of the circuit remains unchanged.

Explain the variation of V with distance x as S is moved from A to B.

Calculate the resistivity of the metal from which the wire is made.

=........ m

The table below shows the work function of four metals.

Metal	A	B	C	D
/ eV	3.2	4.1	3.3	6.4

Electromagnetic radiation of wavelength 380 nm is incident on all the metals. Photoelectrons are just emitted from metal A.

Explain, in terms of the energy of photons, why metal C will not emit photoelectrons.

Calculate the maximum wavelength of the electromagnetic radiation in nm that will just eject photoelectrons from metal D.

The metal B is now exposed to electromagnetic radiation of a different wavelength. The energy of each incident photon is 5.3 eV.

Calculate the minimum de Broglie wavelength of the emitted photoelectrons.

A researcher is carrying out an experiment to determine the work function of a new material. The material is illuminated by electromagnetic radiation of frequency f and the maximum kinetic energy KE_max of the photoelectrons is determined.

The researcher plots the data points shown below.

Draw a straight line of best fit through the data points.

Use the gradient of this line, and Einstein’s photoelectric equation, to determine the work function of the material.