3. Electricity

Question 1

What is conventional current

Answer 1

current that flows from positive to negative.

Question 2

What is charge?

Answer 2

Charge is measured in coloumbs

Question 3

What is current ?

Answer 3

Electric current is the rate of flow of charge.

Question 4

What is Resisntace?

Answer 4

Resistance is the opposition to the flow of electrical current, It can be calculated from the equation.

Question 5

What is ohms Law ?

Answer 5

States that the current through a component is directly proportional to the voltage across it.

v = I x R

Question 6

What is Resistivity ?

Answer 6

The resistivity of a material is defined as the same value as the resistance between opposite faces of a cubic metre of the material.

Question 7

What is voltage?

Answer 7

work done per unit of charge

Question 8

What are the properties of a diode?

Answer 8

threshold voltage is around 0.7 volts, current only passed in one direction

Question 9

What are the properties of a filament bulb

Answer 9

non - ohmic conductor current affects the temperature more current means higher temperature