Physics 0625/22 October/November 2019: question paper and mark scheme

Question

A student measures the dimensions of a cylindrical glass beaker. For which measurement should she use a micrometer screw gauge? A circumference of the beaker B diameter of the beaker C height of the beaker D thickness of the glass wall of the beaker

Question

The graph shows how the speed of a car varies during part of a journey. 20.0 speed m / s 15.0 10.0 5.0 0 0 2.0 4.0 6.0 8.0 10.0 12.0 time / s What is the acceleration of the car between 6.0 s and 10.0 s? A 0.50 m / s2 B 0.80 m / s2 C 1.25 m / s2 D 1.50 m / s2

Question

A car travels at an average speed of 60 km / h for 15 minutes. How far does the car travel in 15 minutes? A 4.0 km B 15 km C 240 km D 900 km

Question

A box is placed on the ground. An upward force of 15 N is needed to lift the box at constant speed. Which row correctly describes the box? mass of the box weight of the box A 1.5 kg 15 N B 15 N 1.5 kg C 15 N 150 kg D 150 kg 15 N

Question

The table gives the mass and the volume of three objects P, Q and R. object mass / g volume / cm3 P 23 36 Q 170 720 R 240 340 Which objects can float in a liquid of density 0.85 g / cm3? A P and Q only B P and R only C Q and R only D P, Q and R

Question

A hook is used to lift a metal plate, as shown. 100 N hook 50 cm 40 cm pivot metal plate W An upward force of 100 N is needed to lift the metal plate about the pivot, as shown. What is the weight W of the metal plate? A 80 N B 100 N C 180 N D 225 N

Question

What is the unit of the moment of a force? A N B N / kg C N/m D Nm

Question

A ship travels due North through still water at a speed of 20 m / s. It enters a channel where there is a current in the water from West to East. The speed of the current is 20 m / s. Which diagram shows the resultant velocity v of the ship? A B N v v W E 20 m / s 20 m / s S 20 m / s 20 m / s C D 20 m / s v 20 m / s v 20 m / s 20 m / s

Question

A ball is at rest on the ground. A boy kicks the ball. The boy’s boot is in contact with the ball for 0.040 s. The average force on the ball is 200 N. The ball leaves the boy’s boot with a speed of 20 m / s. Which row gives the impulse of the boot on the ball and the average acceleration of the ball? impulse on ball average acceleration of ball Ns m / s2 A 8 0.8 B 8 500 C 5000 0.8 D 5000 500

Question

An object P of mass 80 g collides with another object Q of mass 40 g. After the collision, P and Q stick together and then travel on together. Before the collision, P is travelling at a speed of 6.0 m / s and Q is at rest. What is the speed of P and Q after the collision? A 2.0 m / s B 3.0 m / s C 4.0 m / s D 6.0 m / s

Question

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? A chemical B elastic C thermal D sound

Question

A box of mass 8.0 kg is lifted from the ground and placed on a shelf. The box gains 100 J of potential energy. The box falls off the shelf. Air resistance can be ignored. At what speed does the box hit the ground? A 3.5 m / s B 5.0 m / s C 25 m / s D 28 m / s

Question

A car is moving along a straight horizontal road. The car has 1.6 MJ of kinetic energy. The car accelerates for 20 s until the kinetic energy of the car increases to 2.5 MJ. What is the minimum average power developed by the car engine for this acceleration? A 45 W B 205 W C 45 kW D 205 kW

Question

A drawing pin (thumb tack) has a sharp point at one end and a flat surface at the other end. sharp point flat surface The pin is pushed into a wooden board. How do the pressure and the force at the sharp point compare with the pressure and the force on the flat surface? force at the sharp point pressure at the sharp point A greater than on the flat surface greater than on the flat surface B greater than on the flat surface less than on the flat surface C the same as on the flat surface greater than on the flat surface D the same as on the flat surface less than on the flat surface

Question

The density of mercury is 13 600 kg / m3. What is the pressure at the bottom of a column of mercury that has a height of 75.0 cm? A 1.02 × 104 Pa B 1.02 × 105 Pa C 1.02 × 106 Pa D 1.02 × 107 Pa

Question

Which row describes the arrangement and the motion of the molecules in a gas? arrangement motion A far apart move freely B far apart vibrate only C tightly packed move freely D tightly packed vibrate only

Question

A bubble of air of volume 3.0 mm3 is under water. The bubble is at a depth where the pressure of the air inside the bubble is four times atmospheric pressure. The temperature of the air in the bubble stays the same as it rises to the surface. What is the volume of the air in the bubble as it reaches the surface? A 3.0 mm3 B 9.0 mm3 C 12 mm3 D 15 mm3

Question

The same quantity of thermal energy is supplied to each of four blocks. Each block is made from a different material. Which block has the greatest thermal capacity? A B C D temperature temperature temperature temperature increase is increase is increase is increase is 1 °C 4 °C 2 °C 3 °C

Question

A liquid turns into a gas. This occurs only at one particular temperature, and the change happens throughout the liquid. What is this process called? A boiling B condensation C evaporation D fusion

Question

In a cold country, a bicycle has been left outside all night. The cyclist finds the plastic hand grips feel less cold to the touch than the steel handlebars. Which row correctly describes the temperature and the property of the two materials? the temperature of the two materials the property of the two materials A the temperature of the steel is the plastic is a better thermal much lower than that of the plastic conductor than the steel B the temperature of the steel is the steel is a better thermal much lower than that of the plastic conductor than the plastic C the steel and the plastic are the plastic is a better thermal both at the same temperature conductor than the steel D the steel and the plastic are the steel is a better thermal both at the same temperature conductor than the plastic

Question

The diagram shows a tent made from a new material. new material What type of material should the tent be made of to reflect the radiant energy from the Sun? material material texture surface colour A dull black B dull white C shiny black D shiny white

Question

A large hill blocks the direct path between a transmitter of radio waves and a receiver, as shown. transmitter hill receiver The receiver picks up the signal from the transmitter even though the radio waves do not travel through the hill. Which row is correct? A possible way A stronger signal is for this to happen is received using A diffraction round the hill. longer wavelengths. B diffraction round the hill. shorter wavelengths. C refraction round the hill. longer wavelengths. D refraction round the hill. shorter wavelengths.

Question

A ray of light is incident on a plane mirror. A student measures the angle of incidence i and the angle of reflection r. incident i r reflected ray ray The student varies the angle of incidence and then plots a graph of r against i. What does the graph look like? A B C D r r r r 0 0 0 0 0 i 0 i 0 i 0 i

Question

What is monochromatic light? A light of a single amplitude B light of a single frequency C light of more than one colour D light which travels with constant velocity

Question

The diagram shows the electromagnetic spectrum. radio γ-rays X-rays ultraviolet visible light infrared microwaves waves increasing …… A word is missing from the label below the spectrum. Which word is missing? A amplitude B frequency C speed D wavelength

Question

Which row gives a possible set of values for the speed of sound in ice, in water and in steam? speed of sound speed of sound speed of sound in ice in water in steam m/ s m/ s m/ s A 500 1500 4000 B 1500 4000 500 C 4000 500 1500 D 4000 1500 500

Question

A steel bar is placed in an East-West direction for it to be demagnetised. No other magnet is nearby. Which method is not suitable? A Hammering the bar. B Heating the bar to a very high temperature. C Slowly taking the bar out of a coil that carries an alternating current. D Slowly taking the bar out of a coil that carries a direct current.

Question

A plastic rod is rubbed with a dry cloth. The rod becomes positively charged. Why has the rod become positively charged? A It has gained electrons. B It has gained neutrons. C It has lost electrons. D It has lost neutrons.

Question

There is a current of 2.0 A in a resistor for 30 s. The potential difference (p.d.) across the resistor is 12 V. How much energy is transferred in the resistor? A 1.25 J B 5.0 J C 180 J D 720 J

Question

Identical resistors are connected together to form arrangements X, Y and Z. X Y Z What is the correct order of the resistances of the arrangements from the largest to the smallest? A X→Y→Z B Y→X→Z C Z→X→Y D Z→Y→X

Question

Resistors of 1.0 Ω, 2.0 Ω and 3.0 Ω are connected in parallel with a cell. Which statement is correct? A The current in each resistor is different but the potential difference (p.d.) across each resistor is the same. B The current in each resistor is the same but the potential difference across each resistor is different. C The potential difference across the 3.0 Ω is greater than the potential difference across the 1.0 Ω resistor. D The sum of the potential differences across each resistor is equal to the electromotive force (e.m.f.) of the cell.

Question

The diagram shows a circuit component. What is it used for? A to allow current in one direction only B to change the direction of the current C to emit light when there is a current D to increase the size of the current

Question

Which single logic gate behaves the same as the combination of logic gates shown? A AND B NOR C NOT D OR

Question

Where must a fuse be connected in a mains electric circuit? A the earth wire only B the live wire only C the neutral wire only D the live wire and the earth wire

Question

The N-pole of a magnet is moved into a coil of wire connected to a galvanometer. coil S N The needle of the galvanometer moves. Which situation must give a smaller galvanometer reading? A Use a coil with fewer turns and a stronger magnet. B Use a coil with fewer turns and a weaker magnet. C Use a coil with more turns and a stronger magnet. D Use a coil with more turns and a weaker magnet.

Question

A step-down transformer is 100% efficient. It has an input voltage of 240 V a.c. and an output voltage of 60 V a.c. The current in the primary coil is 0.50 A. What is the current in the secondary coil? A 0.13 A B 0.50 A C 2.0 A D 8.0 A

Question

The diagrams show the simple atomic structure for two neutral atoms X and Y of different elements. X Y Which row is correct? atom with atom with a more more electrons positively charged nucleus A X X B X Y C Y X D Y Y

Question

Plutonium-238 decays by the emission of an α-particle. Which equation represents the decay of a plutonium-238 nucleus? A 238 94 Pu → 238 95 U + –10 α B 238 94 Pu → 234 92 U + 42 α C 238 94 Pu → 234 92 U + 42 α D 238 94 Pu → 242 96 U + 42 α

Question

A radioactive isotope has a half-life of 8 days. A detector close to a sample of this isotope gives a count rate of 200 counts per minute. Without the source, the background count is 20 counts per minute. What is the count rate due to the source after 8 days? A 80 counts per minute B 90 counts per minute C 100 counts per minute D 110 counts per minute

Question

Why are some radioactive sources stored in boxes made from lead? A Lead absorbs emissions from the radioactive sources. B Lead decreases the half-life of radioactive sources. C Lead increases the half-life of radioactive sources. D Lead repels emissions from the radioactive sources.