Chapter 1.9 - I, Q, emf and p.d.

Question 1

State the equation for current in terms of a flow of charge.

Answer 1

I = Q / t

Question 2

State the equation for electrical power, which incorporates current.

Answer 2

P = I x V

Question 3

State the equation which shows what the volt involves.

Answer 3

V = W / Q, or V / E / Q

Question 4

State the equation which can be used to determine the quantity of charge carriers moving past a certain point.

Answer 4

Q = n e

Question 5

Sketch a simple circuit, to include a battery and resistor. Indicate via means of an arrow the respective directions of;

1 - Conventional current.

2 - Electron flow.

Answer 5

Question 6

Define electric current.

Answer 6

Charge passing a point in 1 second.

Question 7

Define potential difference.

Answer 7

Energy transferred from electrical to other forms when unit charge passes through it.

Question 8

Define Electromotive force.

Answer 8

Energy converted from other forms to electrical energy when unit charge passes through it.

Question 9

Define the Volt.

Answer 9

One joule of energy is dissipated per unit of charge.