D.C Circuits

Question 1

Define Electromotive force

Answer 1

Electromotive force of a source is the energy transferred per unit charge through the circuit.
Emf= energy transferred in source/ charge

Question 2

State the difference between Emf and Pd

Answer 2

Electromotive force:
• Energy supplied by source/charge
• Other forms of energy to electrical energy

Potential Difference:
• Energy used by components/ charge
• Electrical energy to other forms of energy

Question 3

State Kirchhoff’s 1st Law (KCL)

Answer 3

The sum of currents entering any point of a circuit is equal to the sum of currents leaving the same point.

Question 4

State Kirchhoff’s 2nd Law (KCL)

Answer 4

The sum of E.m.fs around any closed loop in a circuit is equal to the sum of P.ds around the same loop.