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ALL PHYSICS DOUBTS - POST HERE !!

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Ghost Of Highbury:

--- Quote from: Kimo Jesus on May 26, 2010, 08:15:41 am ---yestterday you told me

H= I^2 X R

what is the constant? here?

and does this forumula work for wires ..like decrease the resistance decrease heat loss?
                                work for transformers ..like increasign voltage decreases heat loss?

--- End quote ---

ok this is basically used for transmission of power in overhead cables..

P = V*I

The power is high, thus to decrease current, u have to increase the voltage(so that the power stays the same)

thus high voltage reduces current...and reduced current means reduced heat loss, or electrical energy transferred..

H = I2R

Resistant of wire constant

WARRIOR:

--- Quote from: A@di on May 26, 2010, 08:19:17 am ---ok this is basically used for transmission of power in overhead cables..

P = V*I

The power is high, thus to decrease current, u have to increase the voltage(so that the power stays the same)

thus high voltage reduces current...and reduced current means reduced heat loss, or electrical energy transferred..

H = I2R

Resistant of wire constant

--- End quote ---

ooh i see cheers i get now

+ rep ;)

princess12:
did any 1 finish physics paper 1

haris94:
yup.......just came back
mine was good
wbu?

princess12:
i have not registered for physics

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