Module 3b AC

B represents...

• a cycle

• alternation

• frequency

"A" represents...

• a cycle

• an alternation

• period

Frequency is

• number of cycles in a second

• directly proportional to period

• the same as period

If there are 4 cycles in a second, what is the frequency?

• 4 Hz

• 16 Hz

• 0.25 Hz

If the frequency is 2 Hz, what is the period?

• 4 sec

• 0.5 sec

• 8 sec

The RMS value is 0.707 of

• average

• peak to peak

• peak

If peak voltage is 100 V, what is V(rms)?

• 7.07 V

• 70.7 V

• 35.35 V

If peak to peak voltage is 200 V, what is the RMS value?

• 70.7 V

• 141.4 V

• 7.07 V

How many degrees out of phase are these 2 sine waves?

• 180

• 90

• the are in phase

In a 3 phase generator, how many degrees apart are each phase?

• 360

• 120

• 90