Electrostatics & Electricity

Question 1

Coulomb’s law

Answer 1

The magnitude of the electrostatic force exerted by two point charges (Q1 and Q2) on each other is directly proportional to the product of the magnitudes of the charges and inversely proportional to the square of the distance (r) between them.

Question 2

An electric field

Answer 2

Is a region in space in which an electric charge experiences a force. The direction of the electric field a point is the direction that a positive test charge would move if placed at that point.

Question 3

Electric field strength at a point

Answer 3

The electric field strength at this point is the electrostatic force experienced per unit positive charge placed at that point.

Question 4

Ohm’s Law

Answer 4

the potential difference across a conductor is directly proportional to the current in the conductor at constant temperature.

Question 5

power

Answer 5

is the rate at which work is done or energy is transferred.

Question 6

emf

Answer 6

the maximum energy supplied by a battery per unit charge passing through it