What is potientometer.How it is useful in a sychronoscope.
Answer Posted / thowsif_emerson
A potentiometer is a manually adjustable resistor. The way
this device works is relatively simple. One terminal of the
potentiometer is connected to a power source. Another is
hooked up to ground (a point with no voltage or resistance
and which serves as a neutral reference point), while the
third terminal runs across a strip of resistive material.
This resistive strip generally has a low resistance at one
end; its resistance gradually increases to a maximum
resistance at the other end. The third terminal serves as
the connection between the power source and ground, and is
usually interfaced to the user by means of a knob or lever.
The user can adjust the position of the third terminal
along the resistive strip in order to manually increase or
decrease resistance. By controlling resistance, a
potentiometer can determine how much current flows through
a circuit. When used to regulate current, the potentiometer
is limited by the maximum resistivity of the strip.
Visit:-http://www.wisegeek.com/what-is-a-potentiometer.htm
Is This Answer Correct ? | 5 Yes | 2 No |
Post New Answer View All Answers
1.what is the difference between ct and cvt? 2.what is the difference between pt and cvt? 3.what is the difference between relays and circuit breakers?
can any one suggest paper presentation topies for electrical engg?
If we want to change a contactor of faulty one what are the conditions want to fullfil
What is meant by turbo alternators?
why does a dc machine has high efficiency while working as a generator than as a motor ..
is there any lightning by passer is arranged in ship like buildings?
dg earth connect only in the amf panel or not why
why we setting 95 deg and 105 deg in wti and oti of distibution transformer ? give the reson for that ?
Why reactors use before incoming of ac vvfd drive?
What is the tipical Online UPS input voltage for 20 KVA load ( 3 Phase or 1 Phase )? Why ? Explain it...?
How do you compute voltage drop and cable size over distance?
. How to calculate the Short Circuit Impedance in Transformer? How to calculate the Short Circuit Impedance in Transformer?
describe the phenomena of vacuum interruption in C.B
Why reactive power is needed in a power system? How is it being absorbed or delivered by alternators? For reactive power control we are changing excitation but reactive power absorbing or delivering related to stator. How these two are interlinked? i want a detailed explanation with necessary expressions and figures?
What is Faraday's law