BASIC ELECTRICAL ENGINEERING
QUESTIONS AND VERIFIED
ANSWERS|100% CORRECT|GRADE A+
unit 1. introduction of electrical engineering - ANSWER Current: can be defined as the motion of charge
through a conducting material. The unit of current is Ampere whilst charge is measured in Coulombs.
Definition of an Ampere - ANSWER The quantity of total charge that passes through an arbitrary cross
section of a conducting material per unit second is defined as an Ampere
I=Q/T or Q=IT - ANSWER where Q is the symbol of charge measured in Coulombs(c) I is the current in
amperes (A) and t is the time in seconds(s). The current can also be defined as the rate of charge passing
through a point in an electric circuit i e i = dq/dt
A constant current - ANSWER also known as direct current DC is denoted by the symbol I whereas a time
varying current also known as alternating current AC is represented by the symbol i or i(t)
voltage or potential difference - ANSWER voltage or potential difference between two points in an
electric circuit is 1 V if 1 j (Joule) of energy is expended in transferring 1 C of charge between those
points
It is generally represented by the symbol V and measure in volts(V). - ANSWER Note that the symbol and
the unit of voltage are both denoted by the same letter, however, its rarely causes any confusion
circuit loads: A load generally refers to a component or a piece of equipment connected to the output of
an electric circuit - ANSWER circuit elements 1. resistor (R) 2. inductor(I) 3. Capacitor (C)
voltage and current - ANSWER voltage attempts to make a current flow, and current will flow the circuit
is complete. Voltage is sometimes describe as the "push" or "force" of the electricity, it isn't really a force
but this may help to imagine what is happening. It is possible to have voltage without current, but
current cannot flow without voltage.
QUESTIONS AND VERIFIED
ANSWERS|100% CORRECT|GRADE A+
unit 1. introduction of electrical engineering - ANSWER Current: can be defined as the motion of charge
through a conducting material. The unit of current is Ampere whilst charge is measured in Coulombs.
Definition of an Ampere - ANSWER The quantity of total charge that passes through an arbitrary cross
section of a conducting material per unit second is defined as an Ampere
I=Q/T or Q=IT - ANSWER where Q is the symbol of charge measured in Coulombs(c) I is the current in
amperes (A) and t is the time in seconds(s). The current can also be defined as the rate of charge passing
through a point in an electric circuit i e i = dq/dt
A constant current - ANSWER also known as direct current DC is denoted by the symbol I whereas a time
varying current also known as alternating current AC is represented by the symbol i or i(t)
voltage or potential difference - ANSWER voltage or potential difference between two points in an
electric circuit is 1 V if 1 j (Joule) of energy is expended in transferring 1 C of charge between those
points
It is generally represented by the symbol V and measure in volts(V). - ANSWER Note that the symbol and
the unit of voltage are both denoted by the same letter, however, its rarely causes any confusion
circuit loads: A load generally refers to a component or a piece of equipment connected to the output of
an electric circuit - ANSWER circuit elements 1. resistor (R) 2. inductor(I) 3. Capacitor (C)
voltage and current - ANSWER voltage attempts to make a current flow, and current will flow the circuit
is complete. Voltage is sometimes describe as the "push" or "force" of the electricity, it isn't really a force
but this may help to imagine what is happening. It is possible to have voltage without current, but
current cannot flow without voltage.
