Current, Voltage and Resistance Module

Question 1

What is the Quantity of charge measured in and what letter is used for it?

Answer 1

The unit of measurement for charge is a coulomb (C) and is represented by letter Q.
Example Q = 10 C.

Question 2

What is the mathematical equation for current when referring to quantity of charge?

Answer 2

I(Current) = Q(Quantity in Coulombs) / T(Time in Seconds)

Question 3

What is Conventional Flow?

Answer 3

Also called hole flow, is the movement in a conductor from the positive source to the negative source.

Question 4

What is Electron Flow?

Answer 4

Is the movement of electrons from the negative source to the positive source.

Question 5

What is the number of electrons for one unit of charge?

Answer 5

6.24 x 10¹⁸ electrons

Question 6

What is an Electromotive Force (EMF) and what is is measured in?

Answer 6

Is the force that maintains the difference in charge to ensure current flow continues. The unit of measurement is the volt (V).

Question 7

What are the six methods of producing an EMF?

Answer 7

Magnetic, Chemical, Friction, Heat, Pressure and Light(Photovoltaic)

Question 8

State Ohm’s Law and the equation for it.

Answer 8

Current in a circuit is directly proportional to the voltage, and inversely proportional to the resistance. I = E / R