Electricity and electromagnetism definitions

Question 1

Define Electric current

Answer 1

The amount of electric charge that passes through a wires cross-section in units of time

Question 2

Define the electrical potential difference

Answer 2

The electrical potential difference between 2 points on an electric circuit is defined as the change in potential energy per unit of charge moved between the 2 points

Question 3

Define resistance

Answer 3

Resistance is a property of matter that refers to how difficult it is for electric current to travel through a metal or material

Question 4

Define KCL (series)

Answer 4

When the loads are connected one after another (in series) the current across the source is equivalent to the current across each of the loads

Question 5

Define KCL (parallel)

Answer 5

When the loads are connected at the same 2 points (in parallel) the sum of the current across each of the loads is equal to the current across the source

Question 6

Define KVL (series)

Answer 6

When the loads are connected on after another (in series) the electrical potential difference across the source equals the sum of the electrical potential difference across the loads

Question 7

Define KVL (parallel)

Answer 7

When the loads are connected at the same 2 points (in parallel) the voltage gain across the source equals the voltage drop-off across each of the loads

Question 8

Define Ohm’s law

Answer 8

The electrical potential difference across a resistor is proportional to the current through it