# Electronics - Ohm's Law - Discussion

### Discussion :: Ohm's Law - General Questions (Q.No.2)

2.

If doubling the voltage across a resistor doubles the current through the resistor then

 [A]. the resistor value decreased [B]. the resistor value did not change [C]. the resistor value increased [D]. it is impossible to determine the change in the resistor value

Explanation:

No answer description available for this question.

 Eleczee said: (Oct 31, 2010) We know ohms law,V=IR here V is changed to 2V and so current changes from I to 2I therefore,2V=2IR which implies,V=IR Hence remains the same.

 Laksh said: (Nov 3, 2010) I is proportional to V

 Sarvesh Goswami said: (Aug 21, 2011) In this question the voltage & current across the resister is double i.e. 2v=2I*resister (R) 2V/2I =R v/i= R According to the Ohm's law the value or resister is remain same

 M.Daniyal Munir said: (Sep 22, 2011) We know ohms law,V=IR Here V is changed to 2V and so current changes from I to 2I Therefore,2V=2IR which implies,V=IR Hence remains the same.

 Naren Raja said: (Oct 5, 2011) Resistor value is fixed and it will not change.

 Bajrang said: (Oct 10, 2011) 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.

 Vimala said: (Dec 14, 2011) Thanks eleczee.

 Tayyaba said: (Jun 3, 2012) Voltage and current are proportional to each other and are is a constant:. V=IR. (2V) = (2I)R. V=IR.

 Gil said: (Jul 1, 2012) 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. Since, Voltage at parallel is the same. Current in series is the same. We can say that Vb=2volts & Ib=2amperes in the Second Equation. Therefore. Using the ohms law : I = V/R. Equation 1 : Ra = 1Va/1Ia is 1ohm. Equation 2 : Rb = 2Vb/2Ib is 1ohm. Conclusion. Rb=Ra=1ohm therefore The value of the resistor remains the same and did not change.

 Dileepkumar said: (Aug 25, 2012) 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 V=IR; GIVEN THAT V=2V; I=2I; WE SUBSTITUTE THE OHMS LAW IN ABOVE GIVEN EQATIONS R=2V/2I R=V/I, SO THE RESISTANCE VALUE IS NOT CHANGED BY VARIENG THE CURRENT AND VOLTAGE.

 Sundara Pandian said: (May 18, 2013) According to Ohms law, V=IR and R=V/I. If V doubles and it become 2V and I doubles and it become 2I. Therefore R = 2V/2I = V/I (R values not change).

 Nandhini.S said: (Apr 8, 2015) V=IR. Does are value remain constant always?

 C J said: (May 23, 2016) The resistance R is dependent neither on the voltage V nor on the current I. So R will remain constant.

 C.Gurunathan said: (Aug 4, 2017) It is useful to improve knowldege.