Electricity

Question 1

Define Electric Current:

Answer 1

Electric Current is the charge passing through a circuit per unit time

Question 2

What is ohm?

Answer 2

Unit of resistance

Question 3

What is the potential difference?

Answer 3

The energy transferred per unit charger flowing from one point to another

Question 4

What is Ohm’s law?

Answer 4

It states that for a conductor at a constant temperature, the current flowing through it is proportional to the potential difference across it.

V = IR

Question 5

Is resistivity and resistance the same thing?

Answer 5

Hell nah

Question 6

What is resistivity measured in?

Answer 6

Ohm metres

Question 7

Define Electromotive Force (emf)

Answer 7

Energy converted from non-electrical energy to electrical energy per unit charge or (to drive a unit charge around a complete circuit)

Question 8

What is Kirchhoff’s first law?

Answer 8

Total current entering a junction is equal to the total current leaving it (i.e: current is conserved)