why AC signals are represented by sinusoidal waveform?WHY other waveforms not used for representation

What is the function of Lightning Arrester & Wavetrap in Power system ??

ABB, Bhel, Energy Infratech, Infosys, NTPC,

When a square wave is applied to primary of a transformer then what will be output wave form of secondary ?

Sail, TCS,

When a square wave is applied to primary of a transformer then what will be output wave form of secondary ?

why AC signals are represented by sinusoidal waveform?WHY other waveforms not used for representation

* 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????

how sunlight produce e.m wave in vacuum?

THE usable band width of a microwave transponder for 6/4 GHZ satellite communication is generally is.........

BSNL,

Why the wave trap is put in Y phse only in switchyard?why not in other phases?

IAG Automation, REL,

Why we use caffeine for HPLC calibration in Detector wave ength accuracy test

Arvind, Aurobindo, Cipla, Reddy Labs, Shasun Chemicals,

can we produce cosine wave instead of sine wave? will it usefull?

BARC,

what is wave trap? please explain the working and principle

1.what type of wave is produced from i.online ups ii.offline ups iii.inverter.why don't we use inverter instant of offline ups for computer,what's the reason?

Please brief what is sinewave

Deccan Cements,

If ac 230volts inputsupply to full wave rectifire what is D C output voltage.