COSC 325 – Electrical FINAL Exam (Latest
Update ) Questions & Answers
{Grade A} 100% Correct
Potential energy - correct answer is stored energy a body has due to its position,
chemical state, or condition
Kinetic energy - correct answer energy of motion (released potential energy)
Voltage (AC only) - correct answer is the amount of electrical pressure in a circuit.
Produced any time there is an excess of electrons at one terminal and deficiency in an
other, the greater the difference = higher voltage
DC voltage - correct answer voltage that flows in 1 direction only (portable equipment)
,AC voltage - correct answer voltage that reverses its direction of flow at regular
intervals (res,com,indust lighting and power distribution systems)
Rectifier - correct answer a device that converts AC to DC by allowing the voltage and
current to move in only one direction
Single - correct answer (AC) contains only one alternating voltage waveform
Three - correct answer (AC) a combination of three alternating voltage waveforms,
each displace 120 electrical degrees apart
Current - correct answer the amount of electrons flowing through an electrical circuit
(amperes)
,Ampere/amp - correct answer the number of electrons passing a given point in 1
second
Conventional current flow - correct answer current flow from + to -
Electron current flow - correct answer flow from - to +
Power (P) - correct answer the rate of doing work or using energy
True power (PT) - correct answer the actual power used in electrical circuit (watts, W)
Apparent power (PA) - correct answer the product of voltage and current in a circuit
calculated without considering the phase shift that may be present between the
voltage and current in the circuit (Volt amps, VA)
, Resistive circuit - correct answer a circuit that contains only resistive components,
such as heating elements and incandescent lamps
In - correct answer phase - the state when voltage and current reach their mac
amplitude and zero level simultaneously
Inductance - correct answer the property of a circuit that causes it to oppose a change
in current due to energy stored in a magnetic field
Capacitance - correct answer is the ability of a component or circuit to store energy in
the form of an electrical charge
Power factor (PF) - correct answer the ratio of true power used in an AC circuit to
apparent power delivered to the circuit (PF=PT/PA x 100)
Update ) Questions & Answers
{Grade A} 100% Correct
Potential energy - correct answer is stored energy a body has due to its position,
chemical state, or condition
Kinetic energy - correct answer energy of motion (released potential energy)
Voltage (AC only) - correct answer is the amount of electrical pressure in a circuit.
Produced any time there is an excess of electrons at one terminal and deficiency in an
other, the greater the difference = higher voltage
DC voltage - correct answer voltage that flows in 1 direction only (portable equipment)
,AC voltage - correct answer voltage that reverses its direction of flow at regular
intervals (res,com,indust lighting and power distribution systems)
Rectifier - correct answer a device that converts AC to DC by allowing the voltage and
current to move in only one direction
Single - correct answer (AC) contains only one alternating voltage waveform
Three - correct answer (AC) a combination of three alternating voltage waveforms,
each displace 120 electrical degrees apart
Current - correct answer the amount of electrons flowing through an electrical circuit
(amperes)
,Ampere/amp - correct answer the number of electrons passing a given point in 1
second
Conventional current flow - correct answer current flow from + to -
Electron current flow - correct answer flow from - to +
Power (P) - correct answer the rate of doing work or using energy
True power (PT) - correct answer the actual power used in electrical circuit (watts, W)
Apparent power (PA) - correct answer the product of voltage and current in a circuit
calculated without considering the phase shift that may be present between the
voltage and current in the circuit (Volt amps, VA)
, Resistive circuit - correct answer a circuit that contains only resistive components,
such as heating elements and incandescent lamps
In - correct answer phase - the state when voltage and current reach their mac
amplitude and zero level simultaneously
Inductance - correct answer the property of a circuit that causes it to oppose a change
in current due to energy stored in a magnetic field
Capacitance - correct answer is the ability of a component or circuit to store energy in
the form of an electrical charge
Power factor (PF) - correct answer the ratio of true power used in an AC circuit to
apparent power delivered to the circuit (PF=PT/PA x 100)
