@A device whose resistance changes with light intensity is called a:
L.D.R
Transistor
Rheostat

@What is a typical voltage on the National Grid?
400,000V a.c
240V a.c
575,000V d.c


@Which form of radiation has no charge?
Gamma
Alpha
Beta

@Why are magnets made of steel and not iron?
Because steel keeps its magnetism longer than iron
Because steel is easier to shape and bend
Because steel does not rust as quickly

@Acceleration is a vector quantity because:
it depends on the direction you are going
the size (value) of the acceleration is important
because its units are m/s

@The diagram shows a container of water with a hole. The distance the water is going is L. If you wanted L to remain constant you would have to:
#pre4
Keep the water level in the container the same
Make another hole in the container
Completely fill the container

@Which one of the following is a vector?
Gravity
Potential energy
Mass

@Ice is taken from a fridge and heated. Its temperature is constantly checked. What do the readings show?
The temperature remains around 0C until all the ice is melted, and then rises
The temperature immediately, and steadily, rises
The temperature quickly rises to 4C and then remains constant until all the ice has melted

@Gases expand when heated:
More than solids or liquids
Same as solids or liquids
Less than solids or liquids

@Why does ice float on water?
Density of ice is less than density of water
Ice is transparent
Ice traps air bubbles which makes it float

@A beaker holds 50cm of water. It is heated until all the water has boiled away. What is the volume of steam produced?
Much more than 50cm
Slightly more than 50cm
50cm, as before

@In air beta particles have a range of about:
1m
1mm
1cm

@Why does an object appear black in white light?
Because it absorbs all light
Because it reflects all light
Because it only reflects red and blue

@Which one of the following is a correct statement for e.m waves?
They all travel through space
None of them can travel through space
Some can travel a little way through space

@A shadow will have an umbra and penumbra if:
An extended source is used
A point source is used
A large object is used

@Which lens is a converging lens?
#lens2
Lens y
Lens x
Lens z

@What is the unit of velocity of a sound wave?
Metres per second
Hertz
Metre

@Two resistors, 500 and 1000, are connected in series. The p.d across the 1000 ohm compared to the 500 ohm resistor will be:
Double
Half
The same

@A transformers secondary coil has 1A and 120V. If the primary coil has 240V, what is the current?
0.5A
1A
10A

@Which of these devices could you use to detect charge?
Electroscope
Joule meter
Wheatstone bridge

@The oscilloscope control that causes the trace to move from left to right is:
Time base
X-gain
Trigger

@What units are work measured in?
Joules
Watts
Newtons

@What is meant by the term 'terminal velocity'?
An object accelerates up to a certain velocity, and then no more
An objects acceleration continues to increase at a fixed rate
The acceleration of an object falls by a constant amount

@On Earth the gravitational field strength is 10 N/Kg which means:
Each Kg has a weight of 10 Newtons
One Newtons weighs 10 Kg
One Kg has a mass of 10 Newtons

@Camels have large flat feet. Why?
So they do not sink into the sand
To improve heat loss
To increase friction and get a better grip