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v=I*R, i.e V is directly proportional to I.
now P=V*I. so V=P/I. thus v is inversely proportional to I.
so what is the correct one? If both are correct than for
which kind of condition this 2 differ
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Answer Posted / meenakshi
hey,ur question is wrong men...in the first part i.e, V
proportional I is correct in accordance vid ohm's law. but
in de second part,dc electric power is just an exact
multiplication of voltage and current.n there is no
relation as u say.vil make u understand r8 nw...juz considr
a ckt havn a 18V battery and a lamp of fixed resistance of
3 ohm.nw curnt thru de ckt is 18/3=6A.now am gona increase
voltge alone to 36V WITHOUT DISTURBN THE LAMP..now de curnt
vil b 36/3=12A. coming to the power,for the first case it
is 108W n for the second case its 432W (P=VI).now what u
ave to understand is,V inversely prop to I vud ave been
correct iff powers of two ckts were constant.but
practically speakn it is not so as u can very wel c frm the
above mentioned example.
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