Answer / 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

What are the safety devices on Cumins Diesel Generators from 500 kva to 1500 kva.

1 Answers   Maruti Suzuki,

---

what is mean by derating factor?

4 Answers   Essar,

---

1 kva how much amps? How to calculate ?

2 Answers   L&T,

---

why we r used DC megger insted of AC megger?

1 Answers   Adani,

---

WHAT HAPPEN IF GENERATOR TURBINE IF TRIP?

7 Answers   CEERI,

---

which circuit breaker enclosure is best for maintenance guy? 16 bolt & 20 bolt squre or 16,20 bolt hinge

2 Answers  

---

What is time response of the control system?

0 Answers  

---

11KV electrical line going through the forest in cloudy night ,how can we find the direction of line.

5 Answers   Bhel, Cesco, HZL, Nesco,

---

what will happen when excitation of a synchronous machine is suddenly reduce to zero when it is running at full load..??

7 Answers  

---

How to calculate the motor winding resistance ?

21 Answers   Forbis, L&T, OEGI, VTI,

---

Salient pole alternator is more stable, why?

0 Answers  

---

CFL lamp is what type of load?

6 Answers  

---