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level: Level 1 of Chapter 8

Questions and Answers List

Question	Answer
What are charge carriers?	Charged particles
Electric current is measured in ...	Amperes A
Charge is measured in	Coulombs C
What is the formula used to calculate charge	Current x time
Explain the term current	current is the flow of charged particles called charge carriers
What is the symbol that represents charge	-e
What is magnitude of charge known as	Elementary charge
What are 3 examples of good conductors of electric current	Copper, silver and gold
What is number density and what is the symbol	Number of conduction electrons per unit volume is called number density and has symbol n
What is the number density of copper?	10^29 m^-3
When is the term potential difference used	used when charges lose energy by transferring electrical energy to other forms of energy in a component, such as thermal energy or kinetic energy
What is the formula used to calculate energy transferred	potential difference x charge
What is electromotive force defined as?	Energy transferred per unit charge
What is the formula used to calculate resistance	potential difference ➗ current
What are the 3 Equations for power	P = VI P = I^2 R P = V^2 ➗ R
What is the formula used to calculate energy transferred	current ✖️ voltage ✖️ time