Answer Posted / subhasish(rimo) sengupta

f=1/T. when,T = time period for one full cycle.
in T seconds, 1 revolution is completed.
So, in 1 second,1/T revolutions or f full waves is formed.

If there are P no. of poles,then P/2 no. of full waves will be formed in one full revolution of the field.
Now, if n=rotation of the field in 1 second,
then f=(P/2)*n
or,n=2f/p.
So, N=(60*2*f)/P , (when N= rotation per min.)
or, N=120f/P.

Why Ac Systems Are Preferred Over Dc Systems?

1311

---

How to megger test 11 kV cable and the acceptance IR value

2985

---

sir i used 3 hp of motor for spraying pump, other home light and other home items which size of allminium pvc wire ix used

1895

---

how to select energy meter? have any calculation?

3014

---

What are the types of windings present in the ceiling fan? What winding will be effective first when we started the fan?What are the resistance and inductance ratios comparatively at the initial speed and full speed of the fan?

3011

---

I have motor of 3 H.P. How i found the rating of capacitor use in it in single phase motor..???

2638

---

role of europe union in UK safety legistlation (electrical safety)

1772

---

What type interview questions ask in Electrical technicians

1806

---

why effective resistance should be more than static resistance in transmission line?

2102

---

Why transformer used in UPS??

1607

---

HOW THE OLTC TRANSFORMER SAVE ENERGY IN COMPARISON TO OFF LINE TRANSFORMER AND IS IT ECONOMICAL TO REPLACE THE OFF LINE TRANSFORMER TO OLTC TRANSFORMER

2200

---

what is LSR?

2201

---

If we have to feed a housing complex having load 8MVA, than what would be the better option, either we first step down 33kv supply into 11kv & than 430v or we proposed no of 33/.44 kv transformer, also which option is economical?

2230

---

What are the material used for resistor?

1121

---

How to know any size of cable if there are not written on cable? Answer must be theurical not by experience.

2134

---