Background radiation is all around us all the time.
(a) (i) Radon is a natural source of background radiation.
Atoms and Radiation – Question 5 was last modified: April 20th, 2016 by
Atoms and Radiation – Question 5
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Household Electricity – Question 2
A set of lights consists of 20 lamps connected in series to the 230 V mains electricity supply.
Household Electricity – Question 2 was last modified: November 18th, 2015 by
Electrical Circuits – Question 2
The current – potential difference graph for one type of electrical component is drawn below.
Electrical Circuits – Question 2 was last modified: November 18th, 2015 by
Energy and Work Done – Question 2
The diagram shows a wind turbine.
(a) The blades of the turbine are 20 metres long. On average, 15 000 kg of air, moving at a speed of 12 m/s, hit the blades every second.
Energy and Work Done – Question 2 was last modified: November 18th, 2015 by
Static Electricity – Question 1
(a) The diagram shows a negatively charged plastic rod held close to a thin stream of water. The water is attracted towards the rod.
Static Electricity – Question 1 was last modified: November 9th, 2015 by
Forces and Motion – Question 1
(a) The diagram shows the horizontal forces acting on a swimmer.
Forces and Motion – Question 1 was last modified: November 9th, 2015 by
Household Electricity – Question 1
(a) The picture shows a person using a set of electronic ‘Body Fat Scales’. When the person stands on the scales, a small, harmless, electric current passes through the person’s body. The scales then calculate the resistance of the person’s body and convert the resistance into a prediction of body fat content.
Household Electricity – Question 1 was last modified: October 29th, 2015 by
Nuclear Fission and Fusion – Question 1
(a) As part of its life cycle, a star changes from being a protostar to a main sequence star.
Explain the difference between a protostar and a main sequence star.
Nuclear Fission and Fusion – Question 1 was last modified: October 29th, 2015 by
Electrical Circuits – Question 1
The graph shows how the electric current through a 12 V filament bulb varies with the potential difference across the bulb.
Electrical Circuits – Question 1 was last modified: October 29th, 2015 by
Energy and Work Done – Question 1
The miners working in a salt mine use smooth wooden slides to move quickly from one level to another.
Energy and Work Done – Question 1 was last modified: October 29th, 2015 by