Electrical feilds

Question 1

Point charge

Answer 1

an electric charge considered to exist at a single point, and thus having neither area or volume

Question 2

Positive charge

Answer 2

one type of electric charge - positively charged objects arttract negatively charged ones, and repel other positive charges

Question 3

Negative charge

Answer 3

one type of electric charge - negatively charged objects attract positiveky charged ones and repel other negative charges

Question 4

electric feild

Answer 4

a region where a charge experiences a force / acceleration

Question 5

electric feild strength

Answer 5

the force per unit positive charge at that point

Question 6

radial feild

Answer 6

a symmetrical feild that diminishes with distance^2 from its centre, such as the electrical feild around a spherical charged object

Question 7

coulombs law

Answer 7

any two point charges exert an electrostatic (electrical) force on each other that is directly proportional to the produce of thier charges and inversly proportional to the square of their seperation.

Question 8

electric potential + units

Answer 8

the work done by an external force per unit positive charge to bring a charge from infinity to a point in an electric feild - unit volt or JC^1

Question 9

electric potential difference

Answer 9

the work done by an external force per unit positive charge to move a charge between two points in an electric field.

Question 10

Similarities between electric fields and gravitational fields

Answer 10

Both are radial fields, both follow an inverse square law

Question 11

Differences