AC & DC

Question 1

Symbol and unit for current

Answer 1

I Ampere (A)

Question 2

Symbol and unit for charge

Answer 2

Q Coloumb (C)

Question 3

Symbol and unit for Electromotive force (EMF) / potential difference (p.d.)

Answer 3

V Volt (v)

Question 4

Symbol and unit for Resistance

Answer 4

R Ohm (Ω)

Question 5

Unit and symbol for power

Answer 5

P Watt (W)

Question 6

Unit and symbol for energy

Answer 6

W Joule (J) or kilowatt hour (kWh)

Question 7

What is inductance?

Answer 7

Inductance is the ability of a circuit to induce an EMF within itself when the current flow around the circuit charges.

Question 8

What is capacitance?

Answer 8

Capacitance is the ability to store charge or electrostatic charge.

Question 9

What is kirchhoff’s current law?

Answer 9

Kirchhoff’s current law states that the total current flowing towards a junction must be equal to the total current flowing away from the same junction.

Question 10

What does kirchhoff’s voltage law state?

Answer 10

Kirchhoff’s voltage law states that in any closed-loop (circuit) the algebraic sum of the EMFs is equal to the algebraic sum of the component potential differences.