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 is the difference between rulling span and wind span of of an Over Head Transmission Line?

0 Answers  

---

What is Tachometer used to measure?

0 Answers   Blue Star,

---

when the rheostat kept in minimum to maximum position in motors what will happen?

7 Answers  

---

How to calculate incoming cable size for 33KV, 1MVA transformer.

1 Answers   IAC,

---

what is phase voltage and line voltage? in line voltage how 415v is obtained?

9 Answers  

---

---

what do you know about SERVOMOTOR

4 Answers  

---

what is the diference beteween dedicated earthing & body earthing?

1 Answers  

---

what are the condition that makes hooter blow?

0 Answers  

---

WHAT R THE SAFETIES IN A HIGH TENSION PANEL N LOW TENSION PANEL. ALSO WAT SAFETIES R THERE IN A 200 KVA TRANSFORMER?

0 Answers  

---

12.5 tons a/c is their how much kva generator can recommend to the customer.

0 Answers  

---

At which conditions a synchronous motor acts as a synchronous condenser?

9 Answers   KSEB,

---

how can i improve the power factor in domestic (230v)

0 Answers   Epcos,

---