PHYSICS QUESTIONS

Which quantity is measured in newtons?

• Energy

• Mass

• Weight

• Work

Which device is designed to convert chemical energy into kinetic energy?

• an a.c. generator

• battery-powered torch

• a car engine

• a wind-up mechanical clock

A man climbs a ladder.

Which two quantities can be used to calculate the useful power of the man?

• the weight of the man and the time taken only

• the weight of the man and the vertical distance moved only

• the work done by the man and the time taken only

• the work done by the man and the vertical distance moved only

A manometer is used to measure the pressure of gas inside a metal container. What is the pressure inside the container?

• equal to the atmospheric pressure

• greater than the atmospheric pressure

• less than the atmospheric pressure but greater than zero

• zero

The distance between two electricity pylons is 60 m. An engineer fits a cable of length 62 m

between the pylons. Why does the engineer choose a cable that is longer than the distance between the two pylons?

• to allow for contraction of the cable in cold weather

• to create a slope in the cable for electrons to flow down

• to keep the current low and the voltage high

• to reduce magnetic fields around the cable

On a cold day, a shiny metal rod feels colder to the touch than a black plastic rod.

Which statement explains this observation?

• The metal rod is a better absorber of infra-red radiation than the plastic rod.

• The metal rod is a better thermal conductor than the plastic rod.

• The metal rod is a worse absorber of infra-red radiation than the plastic rod.

• The metal rod is a worse thermal conductor than the plastic rod.

A boat moves up and down repeatedly as a water wave passes it.

Which name is given to the number of up-and-down movements of the boat per unit time?

• Amplitude

• Frequency

• Speed

• Wavelength

Iron is used for the core of a transformer and steel is used to make a bar magnet.

Which statement explains these uses of iron and of steel?

• Iron is a magnetic material and steel is a non-magnetic material.

• Iron is a permanent magnetic material and steel is a temporary magnetic material.

• Iron is a temporary magnetic material and steel is a permanent magnetic material.

• Iron is a non-magnetic material and steel is a magnetic material.

The resistance of a component in a circuit is found using an ammeter and a voltmeter.

How are the ammeter and the voltmeter connected?

• the voltmeter and ammeter in parallel with the component

• the voltmeter and ammeter in series with the component

• the voltmeter in parallel with the component and the ammeter in series with the component

• the voltmeter in series with the component and the ammeter in parallel with the component

The diagram shows a circuit with a power supply and four components. What is component N?

• Fixed Resistor

• Fuse

• Thermistor

• Variable resistor