Learn Extracted exam questions A-Level Physics 9702 Physics June 2025 Question Paper 12
9702 Physics June 2025 Question Paper 12
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What must all physical quantities have?
What is $0.25\text{ kN}\,\text{mm}^{-2}$ expressed in $\text{N}\,\text{m}^{-2}$?
A student calculates the density of a solid steel cube in an experiment.
The measured mass is $975\text{ g} \pm 10\text{ g}$ and the measured length of side is $50\text{ mm} \pm 1\text{ mm}$.
What is the density of the steel?
The time period $T$ of a pendulum is given by
where $L$ is the length of the pendulum and $g$ is the acceleration of free fall.
The equation is homogeneous.
What is the value of $n$?
Radio waves can be used to measure the distance between Earth and the planet Jupiter.
A pulse of radio waves is emitted from the surface of Earth. The pulse reflects from the surface of Jupiter and is detected again on Earth.
The time between emitting and receiving the pulse is 3960 s.
What is the distance between Earth and Jupiter?
The graph shows the variation with time of the velocity of a car.
Which statement is correct?
A solid object of mass 1.0 kg falls vertically downwards in a vacuum.
When the speed of the object is $60 \text{ m s}^{-1}$, an additional constant force of 50 N suddenly starts to act vertically upwards on the object.
What is the speed of the object 2.0 s after the additional force starts to act?
A stone is thrown upwards and follows a curved path.
Air resistance is negligible.
Why does the path have this shape?
A rocket engine ejects $90\text{ kg}$ of exhaust gas per second at a velocity of $190\text{ m}\,\text{s}^{-1}$ relative to the rocket.
What is the force acting on the rocket due to the ejected gas?
Which statement does \textbf{not} describe an elastic collision between two objects?
A cyclist is riding at a constant speed on a level road.
According to Newton’s third law of motion, what is equal and opposite to the backward push of the back wheel on the road?
A stone is released from rest and falls a long distance in air.
Which graph could show the variation with time $t$ of the acceleration $a$ of the stone?
An empty cart is moving along a horizontal track at a constant velocity.
Resistive forces acting on the cart are negligible.
A heavy rock is dropped vertically into the cart.
The cart continues to move horizontally with the rock inside.
How does the momentum and kinetic energy of the cart with the rock inside compare with the momentum and kinetic energy of the empty cart?
A wooden block is held stationary in a container of water using a string that is attached to both the wooden block and the bottom of the container.
The wooden block has mass $m$ and volume $V$. The water has density $\rho$. The acceleration of free fall is $g$.
What is the magnitude of the force acting on the block due to the tension in the string?
A square shop sign of uniform density has mass $2.4\text{ kg}$ and sides of length $0.86\text{ m}$.
The sign is supported by a hinge along its top edge.
There is friction in the hinge so that the sign hangs from it in equilibrium at an angle of $15^\circ$ to the vertical, as shown.
What is the moment about the hinge of the weight of the sign?
A block is submerged vertically in a liquid. The four diagrams show the block viewed from the side.
Which diagram shows, to scale, the forces exerted on equal areas of the block by the liquid?
The diagram shows a couple.
How is the torque of the couple calculated?
A ball of mass $1.2\text{ kg}$ travels horizontally at a speed of $3.0\text{ m}\,\text{s}^{-1}$.
The ball hits a cushion and comes to rest over a horizontal distance of $0.020\text{ m}$.
What is the work done by the cushion on the ball to bring the ball to rest?
A box of mass $4.9\text{ kg}$ is pushed at a constant velocity from point P at the bottom of an inclined plane to point Q at the top.
The box is pushed by a force of $64\text{ N}$ acting parallel to the slope.
The slope is inclined at an angle of $20^\circ$ to the horizontal and the box moves through a vertical height of $5.8\text{ m}$.
What is the work done against the frictional force acting on the block between P and Q?
Which expression gives the efficiency of a system?
A student has a copper wire and a steel wire with equal lengths and cross-sectional areas.
The student hangs identical loads on the two wires.
The extensions of the two wires are different.
The student calculates the stress, strain and Young modulus of each wire.
Which row identifies with a tick ($\checkmark$) the calculated values that are equal for both wires?
\begin{tabular}{|c|c|c|c|} \hline & stress & strain & Young modulus \ \hline \textbf{A} & $\checkmark$ & & \ \hline \textbf{B} & & $\checkmark$ & \ \hline \textbf{C} & & $\checkmark$ & $\checkmark$ \ \hline \textbf{D} & $\checkmark$ & & $\checkmark$ \ \hline \end{tabular}
Two springs X and Y stretch elastically. The graphs show the variation with extension $x$ of the force $F$ applied to each spring.
Which statement is correct?
Which phrase describes the strain at the elastic limit on a stress–strain graph?
A teacher removes the turntable from a microwave oven and places a bar of chocolate in the oven. She then switches the oven on for a short time.
A stationary wave is formed in the oven.
When the chocolate is removed, the teacher observes that there are two small sections of melted chocolate $6.0\text{ cm}$ apart with unmelted chocolate in between.
Each section of melted chocolate is located at an antinode.
Assume that the speed of the microwaves is $3.0 \times 10^8\text{ m}\,\text{s}^{-1}$.
What is the frequency of the microwaves emitted by the oven?
A sound wave travels from the left to the right.
The graph shows the variation of the displacement to the right of particles in the sound wave with distance, at one instant.
Which letter represents the centre of a compression?
A buzzer emitting sound of frequency $846\text{ Hz}$ is attached to a string and rotated in a horizontal circle. The linear speed of the buzzer is $25.0\text{ m}\,\text{s}^{-1}$.
The speed of sound is $340\text{ m}\,\text{s}^{-1}$.
What is the maximum frequency heard by the observer?
Vertically polarised light of intensity $I_0$ is incident normally on a polarising filter.
The transmission axis of the filter is at an angle $\theta$ to the plane of polarisation of the light.
The intensity of the light after passing through the filter is $\frac{I_0}{3}$.
What is $\theta$?
Which statement compares the behaviour of transverse and longitudinal waves?
A student uses a diffraction grating to determine the wavelength of visible light from a source.
The diffraction grating has 300 lines per mm. The student measures the angle $\theta$ of each order $n$ of the intensity maxima. A graph of $n$ against $\sin \theta$ is plotted. The line of best fit for the plotted points is shown and has gradient $G$.
Which expression represents the wavelength, in m, of the visible light in terms of $G$?
Two waves meet.
What is \textbf{not} a necessary condition for the waves to produce a stationary wave?
Light of a single wavelength is incident normally on a double slit. Interference fringes are observed on a screen.
The distance from the double slit to the screen is $0.60\text{ m}$ and the fringe separation is $1.8\text{ mm}$.
The distance from the double slit to the screen increases by $0.90\text{ m}$.
What is the new fringe separation?
A wire is made from a metal of constant resistivity. There is a constant current in the wire.
Which statement about the potential difference across the wire is correct?
The $I-V$ characteristics for three electrical components are shown.
Which components obey Ohm's law?
A resistor of resistance $200\,\Omega$ is connected to a supply that has a p.d. of $4.00\text{ V}$.
How many electrons enter the resistor in $4.00\text{ s}$?
The diagram shows a cell of internal resistance $1.0R$ connected to a variable resistor.
When the variable resistor has an initial resistance of $2.0R$, the current in the cell is $I_1$ and the terminal potential difference (p.d.) across the cell is $V_1$.
The variable resistor is now adjusted to a new resistance of $4.0R$.
What is the new current in the cell and the new terminal p.d. across the cell?
The diagram shows a four-terminal box connected to a battery and two ammeters.
The currents in the two ammeters are identical.
Which circuit, within the box, gives this result?
Each of Kirchhoff’s two laws presumes that some quantity is conserved.
Which row states Kirchhoff’s \textbf{first} law and names the quantity that is conserved?
Two neutral atoms are isotopes of the same element.
Which statement about the atoms is correct?
What is the composition of a meson?
A nucleus of carbon-11 contains 6 protons and 5 neutrons.
The nucleus of carbon-11 decays by $\beta^+$ emission.
What is the total number of up and down quarks in the product of the decay of this nucleus?
\begin{tabular}{ccc} & up quarks & down quarks \ \textbf{A} & 15 & 18 \ \textbf{B} & 16 & 17 \ \textbf{C} & 17 & 16 \ \textbf{D} & 18 & 15 \ \end{tabular}