Answer / shivam

according to me...in ac , the wave is sinusoidal. the wave
goes to zero twice in one cycle. The person who got shock,
thus can be put away from the supply,,,,but in case of a dc
suppl,,, the supply is direct means wave is a straight
line, and doesnot go to zero anyhow.....thus dc is more
dangerous than ac

Answer / gerhard

Current passing through the body cause the muscle in the
body to contract which stops you from releasing the
conductor if the current passing through your dody is about
50mA. If a ac current of less than 30mA pass through your
body you may be given the chance to come free not only
because the current is low but also because with ac the
signal goes through the zero potential 100times in one
second at 50Hz supply. With a dc supply you will not have
the opertunity to come free as the signal does not go
through the zero potential giving you the break as what ac
does.

Answer / sumanta kumar nahak

because the dc is high rating voltage & constant so,DC is
dangerous.

Answer / nupurpatel

in DC source,its frequency is constant so that their current is high. in AC source,its frequency is sinosuidal form so that their current is fluctuate

Answer / touqheed

DC current is dangerous because , if we observe the graphical representatio of AC current and DC current flow then we can undrestand the flow of AC comes twice to zero in one cycle but where as in AC it will be regular of constant it doesn't cross the position of zero hence probability to escape from high voltage DC shock is ... 5%.

Answer / ulaganathan

peak value remains constant

Answer / anand

220 dc mean 220dc..
but 220ac mean rms valu which is less than 220..
thats why dc is dangerous..

Answer / srilu

Since DC supply is continues where as AC supply is
discontinues (Sinusoidal or any other), a perticular
voltage is of DC effective(dangerous) other then that
perticular DC voltage
This is ONE of reason for using DC current for magnetic

field other then AC

What is the minimum percentage of power that a powerplant can support in ilanding mode ?

1 Answers  

Hi.I want to ask how to calculate contactor rating current? for example I have 460 V , 100 A (induction motor) calculate contactor rating current?

2 Answers  

What is the function of the circuit breaker failure relay?

0 Answers  

as ac supply is given 2 the transformer why it doesnot depends upon powerfactor????

2 Answers  

Ceiling fan motor wiring Hi, I have 2 ceiling fans broken. The receiver/control units burned out due to lightening. One Harbor Breeze and one Hunter's I took them apart (remove receiver units). Now on both of the motor I see 4 wires coming out from each motor I really want to know the function of each wire. Are there anyway I can test to see which is which? After searching forums I know these 4 wires are from 2 sets of coils inside the motor, one is Start winding and the other is Runing winding I could not find the receiver/control unit any where, so I am planing to buy Capacitors and universal remote controls to make the fans run again. Anyone has any idea how to do the wiring, please help Thnks

1 Answers  

draw singleline diagram of star to delta and dol starters

0 Answers   JCP,

What is the effect of solar radiation on the design of an Isolated Phase Busduct?

0 Answers   Exide, Punj Lloyd Ltd,

what is the diffrantial relay???????why we use it on the MDB

5 Answers  

what will be the effect of leading power factor on turbogenerator (and system) that is running parallel with other TG.

1 Answers  

What is a current transformer?

2 Answers   KEPL,

Earth is a conductor or load?then ammeter connect to 3- phase supply,it shows the measurents or not?

0 Answers   UltraTech,

What is the difference between Earth and Neutral?

2 Answers