Electric Circuits

Question 1

Define current

Answer 1

The rate of flow of charge

Question 2

Define potential difference

Answer 2

The work done per unit positive charge

Question 3

Determine the relationship between current and potential difference at constant temperature

Answer 3

The potential difference across a resistor decreases/increases in the same proportion as the current strength through the resistor and produces a constant value at a constant temperature

Question 4

State ohms law

Answer 4

Current through a conductor is directly proportional to the potential difference across the conductor at constant temperature

Question 5

Distinguish between an ohmic and non-ohmic conductor

Answer 5

An ohmic conductor is a conductor that obeys ohms law. The ratio remains constant at a constant temperature. A non ohmic conductor is a conductor that does not obey ohms law . The ratio does not remain constant

Question 6

Define resistance

Answer 6

A materials opposition to the flow of electric current

Question 7

What is electrical energy measured in?

Answer 7

Joules