Answer / lokeshraj

The power factor of a choke coil is near to zero. as PF=cos
(angle). In choke coil the angle is near to 90.

Answer / rohan

choke is a inductive load and inductive load is always have
lagging pf

Answer / narendra

It should be zero

Answer / lucky

Pf means power dissipated in the circuit. So in case of pure inductor power consumption is zero so power factor is 0.

Answer / narendra saini

it should be 0.8 to unity because choke improve pf...

Answer / simon

The watt of the choke is 40 so at 250v it will be 0.16.

Answer / dev

i think it should be 0.7 to 0.8 because we use
it step up the voltage like transformeri

Answer / yadav

its 0.8 because tubelight improve the power factor

Answer / dj

it is .6 acc to my book

Answer / parvesh lathar

0.5 lag

why transformers not work at d.c.-

3 Answers  

Show formula which gives full load current 4.8 amps of a 3 HP motor and 27 amps of a 20 HP motor having 3 phase 460 volts, 0.8 Pf.

2 Answers  

How do you convert the lt amps on a transformer to the ht amps?

2 Answers  

Though transformer consist winding which usually cause reactive power change in both generator and motor but it wont affect reactive power passing through transformer why?

2 Answers   Jindal, Reliance,

what is zero sequence curr ent ?

4 Answers  

why we provided electrical earthing?

5 Answers   CPCL,

Amoung all classes of electric machines, why the transformer uses oil as one medium of cooling?

4 Answers  

what is the use of the puls transformer in UPS & how it works???????????

0 Answers  

line vltage of three phase distribution transformer is 433v and phase voltage is 250v,but we required 230v for domestic distribution,then how we reduce phase voltage of transformer

5 Answers  

What is broken wire condition in transmission line?

2 Answers   TATA,

What is an isolation transformer?Why do we need isolate circuits?Where do we use them?

2 Answers  

Why RCD trips on connecting to one Socket but not trips one other circuit on same RCD.

1 Answers