Question | Options |
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A plumber measures, as accurately as possible, the length and internal diameter of a straight copper pipe. The length is approximately 80 cm and the internal diameter is approximately 2 cm. What is the best combination of instruments for the plumber to use? | internal diameter rule length rule, internal diameter rule length tape, internal |

What is the correct unit for the quantity shown? | quantity electromotive force (e.m.f.) unit N, quantity latent unit heat J, qua |

Which vehicle has an acceleration of 5 m / s2? | a bicycle, when its speed changes from rest to 2.5 m / s in 2 s, a car, when its speed changes from |

A student collects stones and finds their density. Which apparatus is needed to measure the mass and the volume of the stones? | mass newton meter volume measuring cylinder and water, mass newton meter volume r |

The diagram represents parts of a power station. coal-fired boiler ? turbine ? electricity generator What is the order of the energy changes taking place? | chemical ? heat ? kinetic ? electrical, chemical ? kinetic ? heat ? electrical, heat ? chemical ? k |

The centre of the Sun produces large amounts of energy. What is the source of this energy? | chemical reaction, nuclear fission, nuclear fusion, radioactive decay |

A crane lifts a weight of 1000 N through a vertical height of 30 m. It uses 60 000 J of energy. What is the efficiency of the crane? | 0.2, 0.3, 0.5, 2 |

According to the kinetic theory, matter is made up of very small particles in a constant state of motion. Which row best describes the particle behaviour in the liquid state? | strong move randomly at high speed, strong vibrate but are free to move position, strong vibrate t |

A balloon filled with air is gently heated.What happens to the mass and the density of the air inside the balloon? | mass decreases density decreases, mass decreases density stays the same, mass st |

A certain liquid is used in a liquid-in-glass thermometer. It does not expand uniformly with temperature. What effect will this have on the scale of the thermometer? | It will be non-linear., It will have a small range., The markings will be close together., The ma |

Fillings in teeth should be made from a material which | does not expand when heated., expands by the same amount as the tooth when heated., expands less t |

Which application may use the part of the electromagnetic spectrum called microwaves? | cooking vegetables, detecting small cracks in metals, gaining a sun-tan, lighting a fluorescent t |

Sound travels at different speeds in air, water and steel. For these materials, which row is correct? | sound travels slowest in air sound travels fastest in steel, sound travels slowest in air |

Which list contains an example of a non-magnetic material, a magnetic material and a magnetised material? | copper, iron, a compass needle, copper, iron, polythene, iron, steel, a compass needle, iron, ste |

To charge an isolated metal sphere by induction, the following four processes are required. P The sphere is earthed by touching it. Q The earth connection is removed from the sphere. R A charged rod is brought close to the sphere. S The charged rod is removed. | P ? Q ? R ? S, P ? R ? S ? Q, R ? P ? Q ? S, R ? P ? S ? Q |

Which changes both cause a decrease in the resistance of a copper wire? | size of wire decrease in length temperature of wire lower, size of wire increase in le |

A lamp rated 6 V, 2 A is switched on for 60 s. How much energy is used? | 0.2 J, 20 J, 180 J, 720 J |

The coil in an electric motor is wound onto a cylinder.Why is the cylinder made of soft iron? | to deflect the magnetic field away from the coil, to increase the current through the coil, to inc |

The electromotive force (e.m.f.) induced in a conductor moving at right-angles to a magnetic field does not depend upon | the length of the conductor., the resistance of the conductor., the speed of the conductor., the |

Tritium is a radioactive isotope of hydrogen with a half-life of 12 years. If a sample starts with 40 million atoms of tritium, how many atoms of tritium will be left after 12 years? | 40 million, 20 million, 10 million, 5 million |

A radioactive nuclide 238 / 92 U decays into thorium by emitting an alpha-particle. The thorium then decays into protactinium by emitting a beta-particle. What is the symbol for protactinium? | 230 / 90 Pa, 234 / 89 Pa, 234 / 90 Pa, 234 / 91 Pa |

A plumber measures, as accurately as possible, the length and internal diameter of a straight copper pipe.The length is approximately 80 cm and the internal diameter is approximately 2 cm.What is the best combination of instruments for the plumber to use? | internal diameter rule length rule, internal diameter rule length tape, internal di |

What is the correct unit for the quantity shown? | quantity electromotive force (e.m.f.) unit N, quantity latent heat unit J, quantity |

Which vehicle has an acceleration of 5 m / s2? | a bicycle, when its speed changes from rest to 2.5 m / s in 2 s, a car, when its speed changes from |

A student collects stones and finds their density. Which apparatus is needed to measure the mass and the volume of the stones? | mass newton meter measuring volume cylinder and water, mass newton meter volume rule |

The diagram represents parts of a power station. coal-fired boiler ? turbine ? electricity generator What is the order of the energy changes taking place? | chemical ? heat ? kinetic ? electrical, chemical ? kinetic ? heat ? electrical, heat ? chemical ? |

The centre of the Sun produces large amounts of energy. What is the source of this energy? | chemical reaction, nuclear fission, nuclear fusion, Radioactive decay |

A crane lifts a weight of 1000 N through a vertical height of 30 m. It uses 60 000 J of energy. What is the efficiency of the crane? | 0.2, 0.3, 0.5, 2 |

According to the kinetic theory, matter is made up of very small particles in a constant state of motion. Which row best describes the particle behaviour in the liquid state? | forces between particles strong motion of particles move randomly at high speed, forces be |

A balloon filled with air is gently heated. What happens to the mass and the density of the air inside the balloon? | mass decreases density decreases, mass decreases density stays th |

A certain liquid is used in a liquid-in-glass thermometer. It does not expand uniformly with temperature. What effect will this have on the scale of the thermometer? | It will be non-linear., It will have a small range., The markings will be close together., The ma |

Fillings in teeth should be made from a material which | does not expand when heated., expands by the same amount as the tooth when heated., expands less th |

Which application may use the part of the electromagnetic spectrum called microwaves? | cooking vegetables, detecting small cracks in metals, gaining a sun-tan, lighting a fluorescent tu |

Sound travels at different speeds in air, water and steel.For these materials, which row is correct? | sound travels slowest in air sound travels fastest in steel, sound travels slowest i |

Which list contains an example of a non-magnetic material, a magnetic material and a magnetised material? | copper, iron, a compass needle, copper, iron, polythene, iron, steel, a compass needle, iron, ste |

To charge an isolated metal sphere by induction, the following four processes are required.P The sphere is earthed by touching it.Q The earth connection is removed from the sphere.R A charged rod is brought close to the sphere.S The charged rod is removed.In which order can these stages | P ? Q ? R ? S, P ? R ? S ? Q, R ? P ? Q ? S, R ? P ? S ? Q |

Which changes both cause a decrease in the resistance of a copper wire? | size of wire decrease in length temperature of wire lower, size of wire increase in l |

A lamp rated 6 V, 2 A is switched on for 60 s.How much energy is used? | 0.2 J, 20 J, 180 J, 720 J |

The coil in an electric motor is wound onto a cylinder.Why is the cylinder made of soft iron? | to deflect the magnetic field away from the coil, to increase the current through the coil, to inc |

The electromotive force (e.m.f.) induced in a conductor moving at right-angles to a magnetic field does not depend upon | the length of the conductor., the resistance of the conductor., the speed of the conductor., the st |

Tritium is a radioactive isotope of hydrogen with a half-life of 12 years. If a sample starts with 40 million atoms of tritium, how many atoms of tritium will be left after 12 years? | 40 million, 20 million, 10 million, 5 million |

A radioactive nuclide 238 / 92 U decays into thorium by emitting an alpha-particle. The thorium then decays into protactinium by emitting a beta-particle. What is the symbol for protactinium? | 230 / 90 Pa, 234 / 89 Pa, 234 / 90 Pa, 234 / 91 Pa |

The diameter and the length of a thin wire, approximately 1 m in length, are measured as accurately as possible.What are the best instruments to use? | micrometer rule, micrometer vernier calipers, rule tape, vernier calipers rule |

A quantity is quoted as having a value of 6.2 ms.In what units is it measured? | metres, metres per second, microseconds, milliseconds |

The efficiency of an electrical generator is 65 %. The energy input to the generator is 12 kJ.What is the useful energy output? | 4.2 kJ , 5.4 kJ, 7.8 kj, 780 kj |

Coal is burned as fuel to heat water in a boiler, producing steam. The steam drives a turbine, which is connected to an electric generator.In which order do the major energy transformations take place? | chemical energy ? heat energy ? electrical energy ? kinetic energy, chemical energy ? heat energy ? |

Objects with different weights are placed on a rigid, horizontal surface.Which row shows the correct pressure acting on the surface? | weight / N 10 area in contact / m2 N/m2 0.1 pressure 1 , weight / N 20 area in contact |

How does heat transfer through a vacuum take place? | by conduction, convection and radiation, by conduction only, by convection only, by radiation onl |

Which row explains why a liquid has a fixed volume but does not have a fixed shape? | large move throughout the liquid, large vibrate at fixed positions, small move throughout the liqu |

To raise the temperature of a 2.0 kg block of metal by 20 °C, energy of 5.2 kJ is needed.What is the value of the specific heat capacity of the metal? | 0.13 J / (kg °C), 52 J / (kg °C), 130 J / (kg °C), 52 000 J / (kg °C) |

What makes a clinical thermometer suitable for measuring small changes in body temperature? | The amount of mercury in the bulb is small., The bore of the capillary tube is narrow., The capillar |

How do the speed and the wavelength of red light in air compare with the speed and the wavelength of violet light in air? | speed of red light greater wavelength of red light greater, speed of red light greater |

The current in a filament lamp is 0.25 A when working normally. The lamp is connected to a plug and the mains a.c. supply. When the lamp is switched on, it does not light.What is a possible cause for this? | The earth wire in the plug is not connected., The fuse in the plug is 3 A., The lamp only works on |

Which appliance used on a 240 V supply is most likely to burn out its fuse? | appliance 100 W lamp fuse 1 A, appliance 1 kW vacuum cleaner fuse 5 A, appliance |

One component of a simple d.c. motor is a split-ring commutator. Which metal is used to make the commutator, and why is this metal chosen? | metal copper reason it is a good conductor of electricity, metal copper reason it is a |

The isotope barium-140 has a half-life of 13 days. A sample of this isotope is kept for 13 days. Which quantity halves during this time? | the number of atoms of barium-140 in the sample, the number of electrons in an atom of barium-140, |

0.2, 0.3, 0.5, 2 | |

Which list contains an example of a non-magnetic material, a magnetic material and a magnetised material? | copper, iron, a compass needle, copper, iron, polythene, iron, steel, a compass needle, iron, ste |

The coil in an electric motor is wound onto a cylinder.Why is the cylinder made of soft iron? | to deflect the magnetic field away from the coil, to increase the current through the coil, to inc |

Tritium is a radioactive isotope of hydrogen with a half-life of 12 years. If a sample starts with 40 million atoms of tritium, how many atoms of tritium will be left after 12 years? | 40 million, 20 million, 10 million, 5 million |