Key Electronics Flashcards
1
Q
What are currents measured in?
A
Amps
2
Q
What is voltage measured in?
A
Volts
3
Q
What is resistance measured in?
A
Ohms
4
Q
What is power measured in?
A
Watts
5
Q
What is energy measured in?
A
Watt-hours
6
Q
What is ohms law?
A
Current= voltage over resistance
7
Q
Principle of power
A
Power (in watts)=voltage x current or p=ei
8
Q
How does a current flow?
A
From a negative pole to a positive pole.
9
Q
What must exist for electricity to flow?
A
A closed circuit.
10
Q
What frequencies do electronic devices operate at?
A
Very high frequencies
11
Q
What are devices that change ac to dc?
A
Rectifier
