Answer / kaustav

active sensor r those which does not require any power source
where as passive sensors are those which require power source

Answer / tanvir

Active sensor are not required a power from out side to
operate thermocople is the example of that when the heat
produce its free end devlope a thermo EMF in mv and its
calibrate as per requirement.
and pesive sensor need a power from out side for operating.

Answer / meenakshi

wel,the main difference is that active sensor senses an
obstacle by sending and receiving signals for eg ultrasonic
sensors.whereas the passive sensors merely receives signal
for eg infrared sensors comes under this category.it juz
senses the obstacle by taking the heat signature of that
obstacle.

DEFINE BREAKING CAPACITY OF BUSBAR & HOW IT IS CALCULATED?

0 Answers  

---

As we know multiplicity factor derivation equation is as below MF = main c t ratio / main p t ratio * meter c t ratio / meter p t ratio * meter dial constant Where in digital meters for HT kwh import export now a days meter constant are calibrated already which is 1 So my question is For HT 11kv 110 v line values are as below Main c t and p t ratio are 11000 v and 110 v and 20/5 means 20 amp and 5 amp Now meter values are 11000/√3/110√3 and primary and secondary amp are displayed as -/5 amp on kwh meter so what will be the MF for this meter ?

1 Answers   NEPC,

---

what is the Connected Load (kW) or Contract Demand (kVA)of mahindra nasik plant??

0 Answers  

---

dear all i am kumara now current working in electrical designing of control and relay panel i want learn some substaion design then any book are available. pls mention name and authour

0 Answers  

---

What is the difference between Welding Transformer and Normal Transformer?.

2 Answers   DAE,

---

in a dc motor we supply current only to the armature conductors,from where is the field winding gets excited then??

3 Answers   RRB, Siemens,

---

Why is DC use instead of AC for protection and control circuits?

4 Answers  

---

If I have a LT panel 3ph, 415V, 50Hz which demand load-600kw, how we can calculate its body earth strip size.

1 Answers  

---

what is effect of unbalaced load -- say R 15A, Y 25A, B 10A

4 Answers   TransWorks,

---

What is the difference between amorphous core transformer and CRGO core transformer?.

0 Answers   DAE,

---

What size cable (based on voltage drop) is required to supply a 40 A three phase boiler if the wiring system is 75V single insulated cables installed in non-metallic rigid conduit 56m from the main switchboard? Voltage drop in the consumer's mains is 8V.

0 Answers  

---

sir please send me iocl written test paper in my e-mail account. i'll be obliged to you........ thank u roshan

0 Answers   IOCL,

---