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WorksheetsCHAPTER 1 Miscellaneous Question
Total questions: 61
Worksheet time: 31mins
What is a simple magnet made up of?
North and East poles
North and South poles
East and West poles
South and West poles
What happens when a conductor is moved through a magnetic field?
A magnetic field is produced
The conductor becomes electrically charged
A voltage is produced in the conductor
The conductor becomes magnetized
What is the phenomenon called when current flow is induced in a conductor due to a magnetic field?
Electromagnetic force
Electromagnetic radiation
Induction
Electric potential
What happens to the direction of current flow when the direction of conductor movement across the magnetic field is reversed?
The current flow remains the same
The current flow becomes stronger
The current flow reverses direction
The current flow stops
What happens to the magnetic field surrounding the conductor when the voltage is increased?
The magnetic field becomes weaker
The magnetic field becomes stronger
The magnetic field is cancelled out
The magnetic field changes direction
What happens to the magnetic field surrounding the conductor when the circuit is opened?
The magnetic field becomes stronger
The magnetic field becomes weaker
The magnetic field changes direction
There is no magnetic field surrounding the conductor
What happens to the polarity of the circuit when the connections of the conductor to the power source are switched?
The polarity of the circuit remains the same
The polarity of the circuit reverses
The circuit becomes electrically charged
The circuit becomes magnetized.
Who built the first electric generating machine?
Ewald Georg von Kleist
Otto von Guericke
Luigi Galvani
Samuel Morse
What is a Leyden jar?
A type of electric generating machine
An electrical storage device
A type of compass
A code of electrical impulses
Who suggested the existence of an electrical fluid and identified two types of electric forces?
H. C. Oersted
Benjamin Franklin
Charles de Coulomb
Nikola Tesla
What did H. C. Oersted discover in 1820?
A Leyden jar
The rotating magnetic field
The relationship between volts, amps, and resistance
A magnetic field surrounds a current-carrying wire
Who invented the Morse code?
Luigi Galvani
Samuel Morse
Nikola Tesla
George Westinghouse
Who formulated a law showing the relationship between volts, amps, and resistance?
George Westinghouse
Charles de Coulomb
H. C. Oersted
G. S. Ohm
Who is the inventor of 3-phase power distribution, the alternating current motor, and wireless transmission?
Benjamin Franklin
Nikola Tesla
Luigi Galvani
Samuel Morse
Who bought the patent rights to Tesla's alternating current system?
George Westinghouse
Charles de Coulomb
H. C. Oersted
G. S. Ohm
What is electricity?
A physical phenomenon tied to the behavior of positively and negatively charged elementary particles of an atom.
A process of converting matter into energy.
A form of heat energy.
What is the Law of Charges?
Opposite charges attract each other and like charges repel each other
Like charges attract each other and opposite charges repel each other
Like charges neither attract nor repel each other.
In the classical theory, what is electrical current?
Flow of charged particles
Flow of protons
Flow of electrons
What are conductors?
Materials that resist the flow of electricity
Materials that carry electrical current without providing too much resistance to current flow.
Materials that are neither good conductors nor good insulators.
What are insulators?
Materials that resist the flow of electricity
Materials that carry electrical current without providing too much resistance to current flow.
Materials that are neither good conductors nor good insulators.
What are semiconductors?
Materials that resist the flow of electricity
Materials that carry electrical current without providing too much resistance to current flow.
Materials that are neither good conductors nor good insulators.
What is thermoelectricity?
Electricity from light.
Electricity from heat.
Electricity from pressure
What is electrochemistry?
Electricity from a chemical reaction.
Electricity from magnetism.
Electricity from heat.
What is photoelectricity?
Electricity from magnetism.
Electricity from light.
Electricity from pressure.
What is magnetoelectricity?
Electricity from magnetism.
Electricity from heat.
Electricity from pressure
What is the Law of Charges?
Opposite charges attract each other and like charges repel each other
Like charges attract each other and opposite charges repel each other.
Like charges neither attract nor repel each other
What is the unit of electrical pressure?
Ampere
Ohm
Volt
EMF
What is the unit used to measure electrical resistance?
Ampere
Ohm
Volt
EMF
What is the rate of current flow measured in?
Ampere
Ohm
Volt
EMF
What law relates voltage, amperage, and resistance in an active electrical circuit?
Coulomb’s law
Gauss’s law
Ohm’s law
Newton’s law
What does resistance (R) refer to in an active electrical circuit?
Ability of a conductor to resist current flow
Rate of current flow
Electrical pressure
None of the above
What is the definition of power in electricity?
The ability of a conductor to resist current flow
The rate at which work is accomplished
The amount of energy consumed by an appliance
The force that drives current flow
What is the electrical unit of power?
Volt
Ampere
Watt
Ohm
How many watts are in 1 horsepower?
746 watts
1,000 watts
3.413 Btu/hr
1 kilowatt
What is the standard billing for energy consumption?
Joule
Watt-hour
Kilowatt-hour
Ampere-hour
What is the equation for calculating energy consumption?
E = IR
P = EI
q = Pt
V = IR
Which of the following is NOT a component of a simple circuit?
Power source
Load
Switch
Transformer
What happens if the path of current flow in a circuit is interrupted or opened?
A closed circuit results
A switch is installed
An overcurrent protection device is activated
An open circuit results
What is the function of a control device in an electrical circuit?
To protect the load and/or conductors from excessive heat
To control the operation of the load
To provide a continuous flow of current
To measure the amount of current flowing in the circuit
Which of the following is the most frequently used circuiting technique?
Series circuit
Parallel circuit
Hybrid circuit
Combination circuit
According to Kirchhoff's Voltage Law, what is the relationship between voltage drops and voltage sources in a complete circuit?
The sum of voltage drops and voltage sources is equal to zero
Voltage drops are always positive
Voltage sources are always negative.
Voltage drops are greater than voltage sources
Which type of current flows in one direction in an electrical circuit?
Alternating Current (AC)
Variable Current (VC)
Direct Current (DC)
Oscillating Current (OC)
What is the direction of current flow in Alternating Current (AC)?
Always from negative to positive terminals
Always from positive to negative terminals
It continuously reverses its direction of flow
None of the above
n a single-phase (1Φ) alternating current distribution system, how many conductors are there?
OneTwo
Two
Three
Four
How many lines of single-phase power are there in a three-phase (3Φ) alternating current distribution system?
One
Two
Three
Four
What is the purpose of a transformer?
To generate power
To transfer power from one circuit to another
To regulate the flow of current
To convert DC to AC
What is an inductor in an AC circuit?
A metal plate that stores electrical energy
A coil of wire that creates an electromagnetic field
A device that generates reactive power
What is a capacitor in an AC circuit?
A metal plate that stores electrical energy
A coil of wire that creates an electromagnetic field
A device that generates reactive power
What is the effect of inductive loads on a series AC circuit?
The phase of the current leads the phase of the voltage
The phase of the current lags behind the phase of the voltage
There is no effect on the AC circuit
What is the effect of capacitive loads on a series AC circuit?
The phase of the current leads the phase of the voltage
The phase of the current lags behind the phase of the voltage
There is no effect on the AC circuit
What is impedance?
A measure of resistance to current flow on an AC circuit due to the combined effect of resistance, inductance and capacitance
The product of measured voltage and measured amperage
The power that generates the magnetic field required for inductive devices to operate
What is the power factor?
The ratio between real power and reactive power in a circuit
The ratio between real power and apparent power in a circuit
The ratio between reactive power and apparent power in a circuit
Why is power factor correction important?
To increase the load currents in an AC circuit
To reduce the load currents in an AC circuit
To generate more reactive power in an AC circuit
What is the energy charge?
The billing fee related to maximum demand
The cost of electrical energy consumed
The cost of metering and bill collecting activities
The method by which nonessential equipment and appliances are deliberately switched off
What is maximum demand?
The user's highest rate at which energy is consumed
The cost of electrical energy consumed
The method by which nonessential equipment and appliances are deliberately switched off
What is the demand charge?
The cost of electrical energy consumed
The billing fee related to maximum demand
The method by which nonessential equipment and appliances are deliberately switched off
What is demand limiting?
A method by which nonessential equipment and appliances are deliberately switched off
A method by which nonessential loads are moved to periods of low demand
A method by which loads are disconnected during periods of high demand
A billing fee related to maximum demand
What is load shedding?
A method by which nonessential equipment and appliances are deliberately switched off
A method by which nonessential loads are moved to periods of low demand
A method by which loads are disconnected during periods of high demand
What is load shifting?
A method by which nonessential equipment and appliances are deliberately switched off
A method by which nonessential loads are moved to periods of low demand
A method by which loads are disconnected during periods of high demand
The billing fee related to maximum demand
What is the time-of-use (TOU) rate?
A method by which nonessential equipment and appliances are deliberately switched off
A method by which nonessential loads are moved to periods of low demand
A method by which loads are disconnected during periods of high demand
A rate that rewards the user for reducing power consumption during periods when electrical demand is highest and a lower rate for the remainder of the year.
What is the additional surcharge?
The cost of electrical energy consumed
The billing fee related to maximum demand
The service or billing charge that covers the cost of metering and bill collecting activities
