Chapter 10 - Electrical Circuits

Question 1

State Kirchoff’s second law.

Answer 1

In any circuit, sum of the EMFs = sum of the P.D.s.

Question 2

Explain Kirchoff’s second law in terms of the conservation of energy.

Answer 2

Work done by the EMF on the charge carriers = Work done by the charge carriers throughout the circuit.

Question 3

What is meant by ‘lost volts’?

Answer 3

The energy wasted per coulomb overcoming internal resistance.

Question 4

What is the terminal potential difference?

Answer 4

The potential difference at the terminals of a power source.

Question 5

How do you find total resistance in a parallel circuit?

Answer 5

1/R = 1/R1 +1/R2 + …