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

is dc transformer is possible ?

4 Answers   Jyona Power,

---

how to calculate the Neutral transformer impedance?

0 Answers   Schneider,

---

What will happend if given Vfd out put to step up transformer

0 Answers  

---

What is the role and reponsibilities of Electrical Engineers in construction field?

12 Answers   ETA, Garg Electronics, L&T,

---

In our generating power station we get electric shock in the battery bank, what will be the reason?

3 Answers  

---

how to reverse the direction of universal motor?

2 Answers   Finolex, JGT, TATA,

---

how techometer works and how it will be connected above the flywheel in dg system

1 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  

---

How can we save electrical cost i.e switchgear, wiring, conduiting etc in a room?

1 Answers  

---

What is the difference between KW & KVA ?

9 Answers  

---

The transformer which is smallest in size is and how to calculate that? The options are 100 KVA, 50 Hz 100 KVa, 100 Hz 100 KVA, 25 Hz 50KVA, 25 HZ

4 Answers   Ranbaxy, Zee Laboratories,

---

how to convert star network in delta or vice versa...?

1 Answers   Toyota,

---