Physics

External Review

Explain whether this statement true: magnetism is the result of a moving electric charge

Electrons moving in atoms, or electric charge moving in a wire, will produce an electric field.

Describe how the direction of a magnetic field is determined.

The direction of a magnetic field is determined by the direction of the force acting on an isolated N-pole in the field.

Define ‘magnetic field’

A magnetic field is a region of space where a magnetic force is experienced.

Charging by Friction

If two different objects rub against one another, the object with the greater electron affinity tends to ‘steal’ electrons from the other object. The object that took electrons becomes more negatively charged and Vise Versa.

Polarisation

When a neutral object is polarised by the presence of a charged object, it is attracted to the charged object

Charge by Conduction

A charged object contacts an otherwise insulated conductor

The insulated conductor is charged

Charging by Induction

When a two neutral conductors are put in electric contact. When a charged object is brought close the neutral conductors charges split to each side of the neutral conductors making them charged.