Magnetism
Natural magnets
Iron Nickel Cobalt
what do you need to create a cell
Two unlike metals and an acid alkaline or salt solution
Only one ohmic value
Cannot be changed or adjusted
Fixed Resistors
Provides the return path and completes the circuit back to the power source
Grounded circuits
Multiwire branch circuits shall supply only line-to-neutral loads
210.4 C
What causes magnetism
Electrons spinning
cannot be recharged
Primary cell
Resistance detetermined by metal type used to form the film
Metal film resistors
Potential difference between two points of conducting wire
Voltage
Receptacles shall be installed such that no point measured horizontally along the floor line of any wall space in more than ___
210.52 A 1
6ft from a receptacle outlet
If an object is placed in a AC field of an electromagnet it becomes
Demagnetized
A device used for measuring the gravity of the cell
Hydrometer
Inexpensive
Can have a high tolerance rating
Carbon film resistors
unit of resistance
ohm
atleast one receptacle outlet readily accessible from grade and not more that __ above grade level shall be installed at front and back of the dwelling
210.52 E 1
6.5 ft
Determines the strength of electromagnets
More amps & turns on the coil : ampere turns
Can be charged 2000 times
Ni-Cad battery
made by winding a piece of resistant wire around a ceramic core
wire-wound resistors
Amount of power being used in a circuit
Watt
The NEC prohibits a conductor with gray insulation from being used as an hot conductor
310.6 B
Magnetism was first discovered....
2000 years ago by the greeks
Volts stay the same ampere hrs adds up
Parallel series
A resistor with orange green red and red bands has what rating
3500 ohms 2%
Current flows from positive to negative
Electron flow theory
contains the requirements for cord and plug connected equipment and appliances
250.114