ELECTROSTATICS

Question 1

Coulomb’s law

Answer 1

The magnitude of the electrostatic force exerted by one point
charge (Q1) on another point charge (Q2) 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

Describe an electric field

Answer 2

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

Question 3

Define electric field at a point

Answer 3

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

Question 4

State Ohm’s law in words

Answer 4

The potential difference across a conductor is directly
proportional to the current in the conductor at constant temperature.
 Determine the relationship between current, potential difference and resistance at
constant temperature using a simple circuit.

Question 5

Define the term emf:

Answer 5

as the maximum energy provided by a battery per unit charge passing through it.