# Atoms and Radiation – Question 5

Background radiation is all around us all the time.

# 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