Electric fields

Question 1

Coloumb’s law

Answer 1

The magnitude of electric force F between the two point charges is proportional to their point changes and inversely proportional to the square of the separation between the point charges

Question 2

Formula for electric force

Answer 2

F = (Q1Q2)/4pi(Eo)*r^2
F = -(dU)/(dR)

Question 3

Electric Field is

Answer 3

A region of space in which a charged body placed at that region experiences a force

Question 4

Electric Field Strength at a point is defined as

Answer 4

The electric force exerted per unit charge acting on a positive test charge placed at that point.

Question 5

Electric Field Strength formula

Answer 5

E = F/q
E = Q/4pi(Eo)*r^2 = -(dV)/(dr)

Question 6

Electric potential energy is defined as

Answer 6

The work done by an external force in bringing a small positive test charge from infinity to that point

Question 7

Electric potential energy formula

Answer 7

U = (Q1Q2)/4pi(Eo)*r

Question 8

Electron volt is

Answer 8

The energy gained by an electron accelerated through a potential difference of one volt

Question 9

Electric potential at a point is

Answer 9

The work done per unit charge by an external agent in bringing a small positive test charge from infinity to the point in the electric field without a change in energy.

Question 10

A uniform electric field is

Answer 10

A region when the electric field strength at any point has the same magnitude and direction, and the electric field lines are parallel and equally spaced, and are directed from a higher to a lower potential.

Question 11

Electric potential formula

Answer 11

V = Q/4π(Eo)r