# Electrical Engineering - Alternating Current and Voltage - Discussion

### Discussion :: Alternating Current and Voltage - General Questions (Q.No.4)

4.

To produce an 800 Hz sine wave, a four-pole generator must be operated at

 [A]. 200 rps [B]. 400 rps [C]. 800 rps [D]. 1,600 rps

Explanation:

No answer description available for this question.

 Vinay said: (Apr 15, 2011) BY USING FORMULA, n=120f/P =120*800/4 =24000 rpm =24000/60 rps n=400 rps

 Saran said: (Aug 20, 2011) N=120f/p N=(120*800)/4=24000 rpm Speed in rps = 24000/60 = 400rps

 Abhishek Tiwari said: (Oct 8, 2011) N=2*f/p(in rps) so, N=2*800/4 N=400 rps

 Santosh said: (Apr 6, 2012) N=RPM*pole/120 800=RPM*4/120 RPM=800*120/4 so RPM=24000 RPS=24000/60 RPS=400

 Swapnil said: (Jun 23, 2012) N=120F/P. N=120*800/4. N=24000. To convert it into rps. 24000/60 = 400.

 Sai said: (Sep 30, 2013) N = 120f/p. = 120*800/4. = 120*200. = 24000 rpm. = 24000/60 rps. = 400.

 Akshaya said: (Dec 29, 2013) Every engineer has different creative. It is shown here.

 You said: (Feb 22, 2014) All showed same formula but differed in arrangement.

 Dino said: (Feb 27, 2014) Frequency = No of poles x Revolution Rate. f = (2 * 400 rps). f = 800 hz.

 Asha.Rrrrr said: (Apr 27, 2014) What is the 60 here?

 Ashok Gavel said: (Jun 7, 2014) N = 2F/P rps. N = (2x800)/4. N = 400 rps.

 Rafiqul Islam said: (Sep 30, 2014) N=? Given data, P=4. f= 800Hz. We know, N= 120 f/P RPM. => N= 120*800/4. => N= 24000rpm. => N= 24000/60 rps. Therefore N= 400rps.

 Gurupriya said: (Dec 7, 2014) Please give clear formula. And what is rps?

 Name said: (Dec 24, 2014) All formula shown by our friends are clear as crystal. RPS means Revolutions Per Second.

 Tukuna said: (Aug 1, 2015) F = (PN)%120, where f in Hz, N in rpm. Given f = 800Hz, P = 4. By applying formula: 800Hz = (4*N)% 120. => N = 24000 rpm. => N = 24000% 60 = 400 rps.

 Shameek Mohamed said: (Oct 25, 2015) N = 2*(f/p); speed in rps. N = 2*(800/4)†\'2*200 = 400.

 Nsabimana Ibrahiim said: (Oct 29, 2015) Given data: F = 800 Hz p = 4 poles = 4/2 = 2 pair of poles. Then Ns = 120*800/4 = 24000 rpm means that you can also use pair of pole using the following formula Ns = 60*800/2 = 24000 rpm you can convert rpm in rps like this 24000/60 = 400. Thank you.

 Naeem Rind said: (Dec 26, 2015) 1 RPS = 60 RPM. And 1 RPM = 1/60 RPS or 0.1666 RPS. The standard unit is RPM, but we have to convert it into RPS for this question.

 Gaju said: (Feb 16, 2016) N = 120f/p. = 120*800/4 = 96000/4. = 24000 rpm. Then in RPS: = 24000/60 = 400rps.

 Mickomkv said: (Jul 24, 2016) What is 120! ? Thanks in advance!

 Sachin Sharma said: (Jul 29, 2016) Same calculate Rpm than calculate Rps N = 120f/p = rpm/60 for convert rps.