Basic Electricity Flashcards
Basic, General, Generating Electricity
What are the particles that make up an atom? Select all that apply.
a.
Neutron
b.
Molecule
c.
Compound
d.
Proton
e.
Electron
A. Neutron
D. Proton
E. Electron
What determines the atomic number of an element?
a.
Number of electrons in the atom
b.
Number of neutrons in the nucleus
c.
Difference in the number of neutrons and electrons
d.
Number of protons in the nucleus
Number of protons in the nucleus
What causes the nucleus of an atom to have a positive charge?
a.
The Protons
b.
The electrons
c.
Friction of the electrons
d.
The neutrons
The Protons
Why does the electron remain in its orbit and not be pulled into the nucleus?
a.
The outward pull from other atoms
b.
The law of repelling
c.
Opposing magnetic fields
d.
Centrifugal force
D. Centrifugal force
What must occur for an atom to become negatively charged?
a.
More electrons than protons.
b.
Less neutrons than protons
c.
less electrons than neutrons
d.
More protons than electrons
A. More electrons than protons
What is the name given to an atom with an unbalanced electrical charge?
a.
Quark
b.
Hydrogen
c.
Stray atom
d.
Ion
D. ION
According to the “Electron Flow Theory”; in what direction does current flow in a circuit?
a.
Negative to positive
b.
Left to right
c.
Right to left
d.
Positive to negative
D. Negative to positive
What type of material will have the most amount of electrons in the outer shell?
a.
Semi-insulator
b.
Insulator
c.
Conductor
d.
Semi-conductor
B. Insulator
Identify three materials which are considered good conductors. Select all that apply.
The correct answers are: Silver, Copper, Aluminum
What is the best known conductor of electricity?
The correct answer is: Silver
How many valence electrons would be found in an atom that is categorized as a semiconductor?
4
Which unit of measure is used to describe “Electromotive Force”?
Voltage
What does “I” indicate in Ohm’s Law?
Current
If the voltage is constant, but the resistance of the circuit is doubled, what would be the effect to current flow?
The correct answer is: It would be reduced by one half
Calculate the current through a circuit if it has 50 ohms of resistance and the voltage drop is 24 volts?
I=ER
I=24V50Ω
I = 0.48 A
The correct answer is: 0.48 A
Calculate the milli-voltage drop through a circuit if it has 1.5 ohms of resistance and the current flow is 0.25 amps?
E = I x R
E = 0.25 A x 1.5 ohm
E = 0.375 v or 375 mV
The correct answer is: 375
What would be the anticipated resistance of a circuit with an EMF of 120 volts and a current of 6 amps?
R=EI
R=120V6A
R = 20 ohms
The correct answer is: 20 ohm
Which of the following materials has the highest resistance to current flow?
The correct answer is: Glass
Which of the following revolve around the nucleus of an atom?
The correct answer is: Electron
At what speed does the impulse of current flow through a conductor?
The correct answer is: 186,000 miles (299,792 kilometers) per second
Which method or source of energy may be used to generate electricity?
a.
Heat
b.
All are correct
c.
Friction
d.
Chemical reaction
The correct answer is: All are correct
Static electricity Answer____
normally a concern during humid weather.
IS NOT
What is the name of the effect that refers to heat being applied to two dissimilar metals or alloys that are joined together that results in current flow?
Thermoelectric effect
What are the two practical applications for thermocouples? Select all that apply.
a.
To provide light for maintenance purposes
b.
To generate extra low voltage
c.
To act as a temperature sensor
d.
To ignite pilot gas with hot surface
b.
To generate extra low voltage
c.
To act as a temperature sensor
What action occurs when a battery produces electricity?
Electrochemistry is produced when a liquid electrolyte is mixed with other materials to form a paste which allows communication between the anode and the cathode. The cell can then be used in any position and handled as though it was actually dry. Therefore a battery is sometime referred to as a dry cell.
The correct answer is: Electrochemistry
What type of appliance is likely to have a piezoelectric igniter? Select all that apply.
a.
Patio heater
b.
Hot water tank
c.
Fireplace
d.
Barbeque
The correct answers are: Hot water tank, Patio heater, Fireplace, Barbeque
What are the three common types of materials used to make magnets? Select all that apply.
a.
Iron
b.
Cobalt
c.
Silver
d.
Copper
e.
Aluminum
f.
Nickle
The two types of magnets are, Permanent Magnets and Electromagnets.
The correct answers are: Cobalt, Iron, Nickle
