5.1 Electric Fields

Two different equations can be used to calculate the same physical quantity, x.

and 

What quantity is represented by x?

Select the correct quantity and unit for this definition;

'the rate of flow of electric charge past a cross-section of material'

An electric field is a region of space in which an electric charge is subjected to a force. Electric fields can be represented with vector diagrams showing the direction of force around a point charge.

Select the pair of diagrams which correctly represent the field lines around a positive and negative charge.

The diagram shows charged particles moving in a metallic material. Choose the line which correctly identifies the missing labels.

Which of the following is a possible drift speed for delocalised electrons in a copper wire?

Which statement correctly describes a property of the drift velocity, v.

Determine the energy of 4 eV in Joules.

Identify the electrical item most likely to use direct current.

For electric field strength, identify the correct equation and description of the diagram.

	Equation	Description
A.		The strength of the electric field is proportional to the number of lines per unit cross-sectional area
B.		The strength of the electric field is indirectly proportional to the number of lines per unit cross-sectional area
C.		The strength of the electric field is proportional to the number of lines per unit cross-sectional area
D.		The strength of the electric field is indirectly proportional to the number of lines per unit cross-sectional area