Whats the principle of lightning? How protection against
lightning is achieved? Types of protection? How to select
the height of lightning spike? as per the area.
Answer Posted / bala
when the atmosperic electrical potential is sufficently
high to break down the air's normal insulation level's
600kv/m. cloud to ground lighning flas occur's.
| Is This Answer Correct ? | 15 Yes | 7 No |
Post New Answer View All Answers
What does ampere turns shows?
What does the term power factor shows?
i need of the bhel question papers along with answers and also give some website names for the downloading question (electrical and electronics engg question)please help me....
can any one tell me about the Extra low voltage systems?From where we give supply to these type of systems??
Is it possible to measure correct value of earth resistance & cable insulation ristance with out disconncting earth lead & both sides of cable ends? If not, any other method to measure ER & CIR with out disconneting from the system.
what is the necessity of under ground cables ??
What is the current carrying capacity of 35sq.mm flexible cable?
What are the advantages of skewing of cage rotor conductors?
IF 8255 CONTROL WORD IS 94H,Tell the chip port work mode ?
What facility we get after CT secondary earthing and how?
For a spring controlled governer the relation F = ar+b (F is the controlling force, r is the radius of rotation a and b are constants), indicates that the governer is
what is meaning of bus riser
Explain and give examples about VCB?
is it value of power factor is more than unit. whats effects in the source supply
What is servo motor? what is its purpose?