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aturday, 24 September 2011
Basic Electrical Engineering Interview Questions 1
hat is Current?
urrent can be defined as the motion of charge through a
conducting material. The unit of current is Ampere whilst charge
is
easured in Coulombs.
ease define Ampere
he quantity of total charge that passes through an arbitrary
cross section of a conduct-ing material per unit second is
defined
s an Ampere.
athematically,
=Q/tQ = It
here Q is the symbol of charge measured in Coulombs (C), I is
the current in amperes (A) and t is t he time in seconds (s).
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8/10/2019 basic electrical interview questions
2/3
osted by ElectEngr Bhatti at 11:35
abels: Electrical Basics
ould you measure current in parallel?
o,Current is always measured through(in series with) a circuit
element.
hat Is the difference between Voltage or Potential Difference?
And What are they?
oltage or potential difference between two points in an electric
circuit is1V if 1J (Joule) of energy is expended in transferring
1
of charge between those points.
is generally represented by the symbol V and measured in volts
(V). Note that the symbol and the unit of voltage are both
enoted by the same letter, however, it rarely causes any
confusion.
he symbol V also signifies a constant voltage (DC) whereas a
time-varying (AC) voltage is represented by the symbol v or
v(t)
ould you measure Voltage in series?
o, Voltage is always measured across(in parallel with) a circuit
element
ow many Types of Circuit Loads are there in a Common Electrical
Circuit?
load generally refers to a component or a piece of equipment
connected to the output of an electric circuit. In its
ndamental form, the load is represented by any one or a
combination of the following:
Resistor (R)
Inductor (L)
Capacitor (C)
load can either be of resistive, inductive or capacitive nature
or a blend of them. For example, a
ht bulb is a purely resistive load where as a transformer is
both inductive and resistive. A circuit
ad can also be referred to as a sink s ince it dissipates energy
whereas the voltage or current supply can be termed as a
ource.
hat are the different Sign Conventions used in electric
circuits?
is common to think of current as the flow of electrons. However,
the standard convention is to take the flow of protons to
etermine the direction of the current.
a given circuit, the current direction depends on the polarity
of the source voltage. Current always flow from positive (high
otential) side to the negative (low potential) side of the
source as shown in the schematic diagram of Figure 2.4(a) where
Vs
the source voltage, VL is the voltage across the load and I is
the loop current flowing in the c lockwise direction.
Source current leaves from the positive terminal
Load (Sink) current enters from the positive terminal
hat do you mean by Passive Circuit Elements and why these are
called Passive?
assive Circuit Elements:
esistor, Capacitor, Inductor
tate and define Ohms Law?
is t he most fundamental law used in c ircuit analysis. It
provides a simple formula describing theltage-current relationship
in a conducting material.
atement:
he current through a conducting material is directly
proportional
the voltage or potential difference across the material.
V
= RI or I =V/R
R =V/I
here the constant of proportionality R is called the resistance
or elect rical resistance, measured in ohms ().
ease Define Ohms Law for A.C(Alternating Current)?
verything else would remain same only the resistance will be
replaced with Impedance, which is defined as the opposition to
e flow of A.C.
hat is the function of Capacitor in Electrical Circuits?
capacitor is a passive circuit element that has the capacity to
s tore charge in an electric field. It is widely used in
electric
rcuits in the form of a filter.
hy Inductors are installed in electrical Circuits?
n inductor is a piece of conducting wire generally wrapped
around a core of a ferromagnetic material. Like capacitors, theye
employed as filters as well but the most well known application is
their use in AC transformers or power supplies that
onverts AC voltage levels.
ou might also like:
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comments:
Jothi Baskar 11 August 2013 at 18:47
thank uuuu
....
niceee...
i m expecting more
Reply
Abdullah 19 September 2013 at 04:19
lush push
Reply
Rahul Chowdhury 15 January 2014 at 11:02
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