Alternating Current and Voltage

A 20 kHz pulse waveform consists of pulses that are 15 s wide. The duty cycle

A is 1%

B is 30%

C is 100%

D cannot be determined

ANS:B - is 30%

Now

time t=1/frequency
=1/20000
=.00005

Now

duty cycle=.000015/0.00005
=.3
and hence ans is .3*100=30%

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