What is the effect of raising voltage when resistance is kept constant?
What is the effect of changing resistance when voltage is kept constant?
2007-11-26 19:54:29 · 4 answers · asked by checked.cherry 2 in Science & Mathematics ➔ Physics
V=IR >>> I=V/R>>> By rising V,Current will increase.
V= constant
Current will increase by decreasing Res.
Current will degrease by increasing Res.
2007-11-26 20:06:28 · answer #1 · answered by iceman 7 · 0⤊ 0⤋
1.Resistance constant-If voltage increased current will rise,so also the wire will get heated.
R=V/I
2.Voltage constant :
There are two ways of changing resistance
A.Increasing length of conductor-the resistance will increase.Current will decrease as resistance increases.
B.Increasing cross section(area) of wire- the resistance will decrease and the current will increase relatively.
V=IR
2007-11-26 20:14:36 · answer #2 · answered by karikalan 7 · 0⤊ 0⤋
1.from v=i*r if r is constant than v is directly proportional to i
so when voltage is raised current is aso raised.
2.when v is constant current is inversly proportional to r
so by increasing resistance current is decreased.
2007-11-26 20:58:38 · answer #3 · answered by bhanu p 2 · 0⤊ 0⤋
1,increased current 2,changed current
2007-11-26 21:18:56 · answer #4 · answered by Goanna Dundee 4 · 0⤊ 0⤋