* Signal transmission in sky wave propagation is due to ?

a) Reforction of wave

b) Reflection of wave

c) Pierus through Inosphere

d) None

and Reason for this is????

Answer Posted / minati reddy

Reforction of wave

Is This Answer Correct ?    1 Yes 0 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

How can we findout the maximum efficiancy of Transformer? At which load?

1606


What happens if the Capacitive Voltage Transformer Primary neutral is not earthed. There is a CVT between Transformer and source, and the CVT neutral of the transformer is not earthed, does it effect the transformer while charging or does it effect the transformer charging process.

3531


What is the necessary and sufficient condition for stability.

707


What is the emf equation of a transformer?

669


why we dont prefer ac voltage controller instead dimmerstat [if both have same rating] for conducting experiments in laboratories?

1696






Give some differences between open loop and closed loop control systems.

669


Can XLPE/SWB/PVC (P3) 7C X 2.5mm2 be replaced by Can XLPE/SWB/PVC (P2) 7C X 2.5mm2??? P3 vs P2

1358


Do any one know exacatly when the results for NHPC held on 8th march 09 for engineering trainees will be released ?. if so please post it, i'm eager to know it.

1684


Currently what is the highest capacity (MVA) of SPPg generator available in the market?

1329


what are the breakdown voltage rating of mini- curcuit'transfarmer!

1660


What is the difference between isolators and electrical circuit breakers? What is bus-bar?

678


Is any generator is developed which is operated with out diesal or other expensive source?

1634


in a solar power plant,we are going to step up the voltage 350V to 33kv, and to 132kv GSS. i want to ask that if it is possible that 315v/33kv is not possible because we also use 315v/11kv. or it should be 415v/33kv? is it effects generation or losses?  the second question is-generation is depends on LV winding? or LV winding design for generation voltage?

1290


can we conduct the swineburne's test on a dc series motor? why?

1629


How can we calculate the efficiency of a Running (On-Load) Motor ? What parameters are required and what is the method ?

1527