Topic 1 Electromotive Force  

What is Electromotive Force?

Topic 2 Ohm's Law

(a) Define the resistance of a circuit.

(b) State Ohm's Law

Topic 3 Power

Express the power dissipated in a circuit in terms of (a) voltage and current, (b) voltage and resistance, and (c) current and resistance.

Topic 4 Resistivity

How is the resistance of a wire related to the length and area of the wire?

Examples

What is the resistance of a 100 W light bulb?

If  about 10 mA is the "let go" current beyond which 110 V circuits can be lethal under certain conditions, what is the minimum resistance of the human body to survive electric shock?

Textbook Problems