Current #1
What is the symbol for current?
I
What symbol represents electrical charge?
Q
What is the symbol used to represent volt drops in an electric circuit?
V
The current in a DC circuit is _____ proportional to the voltage.
Directly
What is the formula for Ohm's Law?
V = I*R
What is the symbol for the unit of measurement for current?
A
What is the equation for charge, current and time?
I = Q/t
What is the force that maintains the source voltage when a current is flowing in the circuit?
Electromotive force
What is an example of EMF generation using chemical reaction?
Cells and batteries
What is the unit of measure for resistance?
ohms
What is the term used to describe a current that flows from negative to positive in the external circuit?
Electron
What is the term used to describe a current that flows from positive to negative in the external circuit?
Conventional
What type of electricity is generated when you rub your shoes on the rug?
Static
Name 3 methods in which EMF can be generated.
Magnetic, chemical, friction, heat, pressure, light
What is the term for materials with low resistance?
Conductors
The buildup of charge in an insulated object is known as _____ electricity.
Static
Charge
How many terminals does a voltage source need?
2
What method of EMF production is used by thermopiles and thermocouples?
Heat
What is the current through a 10 ohm resistor when it is connected across a 100V supply?
10 Amps
How many electrons make up 1 Coulomb?
6.24 x 10^18
How many seconds does it take for 21 coulombs of charge to go past a point if the current is 4 Amps?
21/4 = 5.25 seconds
What principle does a generator use to produce electricity?
Magnetic / electromagnetic
Creating EMF when applying pressure to crystals is known as the _____ effect.
Piezoelectric
Name 3 good conductors of electricity
Copper, silver, gold, aluminum