Basic Electricity Flashcards
(46 cards)
- What is the most important law applicable to the study of electricity?
Ohm’s Law (E=I x R)
- What are the elements of Ohm’s Law?
Voltage(E), Current(I), Resistance(R)
- What are the four sources of electrical energy?
Thermal, light, pressure, and chemical
- What does an electrical circuit consist of?
Source (battery)
Resistance or load (light bulb)
Conductors (wire)
- What represents capacitance in an AC circuit?
A capacitor (same as a condenser)
- What is the function of a capacitor?
To store electricity
- What is the unit of measure for capacitance?
Farad
- What is the standard unit of measure for frequency?
Hertz
- What is the basic component that only allows current to flow in one direction?
Diode (acts like a check valve)
- What is inductance?
Voltage induced by magnetic flux lines in a coil in an AC circuit.
- What is an example of an inductor in a magneto?
The coil
- What is impedance?
Total opposition for AC to flow due to
resistance,
inductive reaction,
capacitive reactance
- What causes opposition to the flow of current in an AC circuit?
Inductive & capacitance reactance
- What is the unit of measurement for impedance?
Ohms
- What is the general purpose of a resistor?
To limit current
- How may the value of a small, fixed resistor be determined?
By the color bands on the resistor
- What are two things that happen when current flows through a conductor?
A magnetic field is generated, and the conductor heats up
- What is the common name for the lines of force that make up a filed surrounding a magnet?
Magnetic flux lines
- What is the concept that describes the relationship between electricity and magnetism?
Electromagnetism
- What are the four factors that affect the resistance of an electrical conductor?
wire gauge,
length,
temperature,
material
- What is the unit of measurement of power in a DC circuit?
Watt
- What is a kilowatt?
1,000 watts
- In a DC circuit, what occurs when voltage is increased while resistance remains constant?
increase in current
- What are the three types of DC electrical circuits?
Series
Parallel
Complex (series & parallel)