wasim shaikh


{ City } surat
< Country > india
* Profession * student
User No # 55623
Total Questions Posted # 5
Total Answers Posted # 5

Total Answers Posted for My Questions # 20
Total Views for My Questions # 58192

Users Marked my Answers as Correct # 39
Users Marked my Answers as Wrong # 1
Questions / { wasim shaikh }
Questions Answers Category Views Company eMail

Why the starting current in Induction Motor is very high as compared to normal rated current ????

Essar,

6 Electrical Engineering 15741

What will happen if 60 Hz rated transformer is connected to the supply of 50 Hz say 415 V (3-phase) step up to 3.3 kV...?? ?

Essar,

2 Electrical Engineering 6526

why in some cases the receiving end voltage is higher than the sending end voltage in transmission line (called 'Ferranti effect') ????? whts the reason behind tht???

 3 Electrical Engineering 6496

What is the effect of impedance on the heat losses in case of AC system??? Does heat losses really depends on the impedance or depends only on resistive component only..??

 4 Electrical Engineering 5035

Why induction motor can not be operated at synchronous speed?? what would happen if it is operated at synchronous speed??

 5 Electrical Engineering 24394



Answers / { wasim shaikh }

Question { 4415 }

defination of loads


Answer

there r basically 2 types of loads...

1.STATIC LOAD

- CONSTANT POWER (induction motor, dc motor & such kind
of machines)
- CONSTANT CURRENT ( electronics ckts)

- CONSTANT VOLTAGE (bulb)

2.DYNAMIC LOAD

Is This Answer Correct ?    2 Yes 0 No

Question { TCS, 7381 }

what is voltage


Answer

if we consider a water pipeline system in analogy of
electrical system then the pressure ( force ) of water is
considered as a voltage and quantity of water can be taken
as current...

Is This Answer Correct ?    4 Yes 0 No


Question { Apollo, 8391 }

why transformer ratinh is in KVA????/


Answer

Cu loss of transformer depends upon current I and iron loos
depends upon voltage V...So as we can say that the total
losses of the transformer depend upon VA (volt-ampere) and
independent of phase angle between V & I (i.e. pf
angle)...so transformer rating is in kVA & nt in KW...

Is This Answer Correct ?    14 Yes 0 No

Question { Hofincons, 4933 }

what is the difference between equipment earth and system
earth.


Answer

in equipment earthing the whole appratus is being earth in
order to protect the human body from any shock while in
system earth the supply is earth by means of neutral point
usually connected in star manner...

Is This Answer Correct ?    13 Yes 0 No

Question { 5945 }

what is apparant power and reactive power


Answer

whn any machine is supplied with some source, some amount of
power is consumed by that machine...the total amount of
power consumed by that machine is called APPERANT POWER...
this apperant power is mainly devided into two powers...

1.ACTIVE POWER 2.REACTIVE POWER

active power is tht power that actually utilized and
delivers the output (usually mechanical) is given by that
machine while reactive power is that power which is required
by the machine but which is not useful at all.so apperant
power is the vectorial summation of active & reactive power.

APPERANT POWER= ACTIVE POWER + REACTIVE POWER.(vector sum)

Is This Answer Correct ?    6 Yes 1 No