Electrical daily capsule 26

Capsule 26
Let's test your self

Q1-Which type of motor is used in ceiling fan

resistance split phase motor

capacitor start motor

capacitor start capacitor run motor

slip ring motor

Q2-Area of hysteresis loop indicates

eddy current loss

hysteresis loss

copper loss

dielectric loss

Q3-For arc heating the electrode are made up of

copper

aluminium

ACSR conductor

graphite

Q4-If the frequency of supply increases, the skin effect is

increased

decreased

remain constant

none of these

Q5-A PN junction is a

oscilator

amplifier

insulator

rectrifier

Electrical daily capsule 24,25

Capsule 25

Let"s test your self

Q1-__________ coating is used to insulate the copper wire.

ceramic

mica

enamel

plastic

Q2-Motor used for elevators is

synchronous motor

universal motor

dc motor

induction motor

Q3-The power factor of industrial load is generally

lagging

leading

unity

zero

Q4-What is the no load speed of a DC series motor

very low

very high

medium

normal

Q5- Which circuit component opposes the change in voltage

inductor

capacitor

resistor

transistor

Capsule 24

Let's test your self

Q1-Power factor is lagging in case of

capacitor

inductor

resistor

diode

Q2-In RLC circuit the susceptance is

1/R

1/Z

1/X

1/C

Q3-_________ is the rate at which the work is done.

power

voltage

frequency

energy

Q4-In case of instantaneous power the frequency is

2 times

4 times

6 times

remain unchanged

Q5-Proton is ___________ times greater than an electron.

1837

5648

2543

equal

Electrical daily capsule 22,23

Capsule 23

Let's test your self

Q1-The reciprocal of magnetic reluctance is

permeance

reactance

resistance

conductance

Q2-The 2 type of conductors are

Electronic & metalic

electrolytic & ionic

metalic & ionic

p-type & n-type

Q3-The ability of charged body to do work is called

Power

force

energy

potential

Q4-The curve of ohm's law is

prabolic

linear

hyperbolic

tringular

Q5-Which instrument has the lowest resistance

voltmeter

ammeter

megger

power factor meter

Thank You

Capsule 22

Let's test your self

Q1-What is the reciprocal of impedance

conductance
reactance
admittance
susceptance

Q2-The unit of energy watt, can be written as

joule/second
joule/coulomb
kWh
ampere/second

Q3-Electrolyte is a

insulator
water
liquid
conducting liquid

Q4-Potential transformer is used to measure the

high current
high voltage
high power
impedance

Q5-The rating of fuse expressed in terms of

ampere
volt

kvA

kWh

Electrical daily capsule 20,21

Capsule 21
Let's test your self

Q1-The conventional flow of current is from

positive to negative

Negative to positive

lower potential

depends on EMF

Q2-The resistivity of a material depends upon the

length

area

material

volume

Q3-The potential of earth is

infinite

zero

equal to supply voltage

1volt

Q4-An electric motor may produce noise due to

magnetic effect

cooling air

defecting bearing

all of the above

Q5-Skin effect exist only in

Low voltage DC overhead line

high voltage Dc overhead line

cable carrying DC current

AC transmission

Capsule 20

Let's test your self

Q1-What is the sign of an electron

positive

negative

no sign

positive or negative

Q2-What is the unit of voltage gain

Volt

ampere

joule

no unit

Q3-An ideal current source has ___________ resistance.

Infinite

zero

100ohm

few

Q4-The unit of conductance is

siemens

ohm-m

mho-m

ohm

Q5-A FETs is essentially a

current driven source

power driven source

voltage driven source

peltier device

Electrical daily capsule 18,19

Capsule 19

Let's test your self

Q1-The speed of a DC shunt motor can increased if

field current increased

field current decreased

armature voltage decreased

field resistance decreased

Q2-The hysteresis loss present in a iron core coil if the current in the coil is

alternating only

sinusoidal only

DC only

Unsymmetrical AC only

Q3-Eddy current loss in ferromagnetic material is directly proportional to

square of frequency

square root of frequency

frequency

reciprocal of frequency

Q4-In DC machines the core are laminated in order to limit

iron weight

armature reaction

eddy current loss

I^2R loss

Q5-Universal motor is a

shunt

induction motor

DC motor

series motor

Capsule 18

Let's test your self

Q1-FETs (field effect transistors) are

bipolar devices

unipolar devices

2 layered devices

none of these

Q2-Which one is a semiconductor

chromium

silica

selenium

bismuth

Q3-In a rectifier circuit, the prime aim of the filter is to

convert AC to DC

reduce the variation in input AC voltage

regulate the DC level

remove ripples from the rectified output

Q4-In fluorescent tube the high voltage is produced by

choke

electrode

heater

stater

Q5-Which is a suitable method for heating of conducting material

Induction heating

radiant heating

eddy current heating

both (a) and (c)

Thank you