Electrical quantities

Question 1

Define impedance with SI units

Answer 1

The amount of opposition to flow of charge in a circuit, measured in Ohms

Question 2

Define voltage with SI units

Answer 2

The potential energy difference between two points, measured in Volts (V)

Question 3

Define current with SI units

Answer 3

The rate of electron flow through a circuit, measured in Amps (A)

Question 4

Define capacitance with SI units

Answer 4

The ability for an electrical component to store charge, measured in Farads (F)

Question 5

Define inductance with SI units

Answer 5

The ability for a circuit to create an emf when a change of flux is caused by a current change, measured in Henrys (H)

Question 6

Define resistance with SI units

Answer 6

The opposition of electrical current, measured in Ohms

Question 7

Define electrical power with SI units

Answer 7

The amount of work done by an electrical current in a unit of time, measured in Watts (W)

Question 8

State one example of energy loss in an electrical system

Answer 8

Heat loss due to resistance in the wires