Here V is changed to 2V
and so current changes from I to 2I
Hence remains the same.
Naren Raja said:
(Wed, Oct 5, 2011 11:16:53 AM)
Resistor value is fixed and it will not change.
(Mon, Oct 10, 2011 11:33:23 PM)
On changing I proportional voltage, the current also change by same extent and we know that R is directly proportional to V and inversly proportional to I hence answer is B.
(Wed, Dec 14, 2011 10:32:34 PM)
(Sun, Jun 3, 2012 03:22:09 PM)
Voltage and current are proportional to each other and are is a constant:.
(2V) = (2I)R.
(Sun, Jul 1, 2012 11:24:19 AM)
Pay attention to the words that is being used in the problem.
ACROSS means = parallel to the resistor.
And THROUGH means = series to the resistor.
Voltage at parallel is the same.
Current in series is the same.
We can say that Vb=2volts & Ib=2amperes in the Second Equation.
Using the ohms law : I = V/R.
Equation 1 : Ra = 1Va/1Ia is 1ohm.
Equation 2 : Rb = 2Vb/2Ib is 1ohm.
Rb=Ra=1ohm therefore The value of the resistor remains the same and did not change.
(Sat, Aug 25, 2012 05:41:44 PM)
Once fix the resistor if then the applied current&voltage is varied randomly ,the resistance not changed.
how ever ,
we know that ohm's law
GIVEN THAT V=2V;
WE SUBSTITUTE THE OHMS LAW IN ABOVE GIVEN EQATIONS
SO THE RESISTANCE VALUE IS NOT CHANGED BY VARIENG THE CURRENT AND VOLTAGE.
Sundara Pandian said:
(Sat, May 18, 2013 01:41:41 PM)
According to Ohms law,
V=IR and R=V/I.
If V doubles and it become 2V and I doubles and it become 2I.