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- @A device whose resistance changes with light intensity is called a:
- L.D.R
- Transistor
- Rheostat
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- @What is a typical voltage on the National Grid?
- 400,000V a.c
- 240V a.c
- 575,000V d.c
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- @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
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- @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/s²
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- @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
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- @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 0°C until all the ice is melted, and then rises
- The temperature immediately, and steadily, rises
- The temperature quickly rises to 4°C and then remains constant until all the ice has melted
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- @Gases expand when heated:
- More than solids or liquids
- Same as solids or liquids
- Less than solids or liquids
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- @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
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- @A beaker holds 50cm³ of water. It is heated until all the water has boiled away. What is the volume of steam produced?
- Much more than 50cm³
- Slightly more than 50cm³
- 50cm³, as before
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- @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
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- @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
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- @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
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- @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