Potentiometer wire of length 1 m is connected in series with 490\[\Ome – McqOptions

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1.	Potentiometer wire of length 1 m is connected in series with 490\[\Omega \] resistance and 2V battery. If 0.2 mV/cm is the potential gradient, then resistance of the potentiometer wire is [DCE 2005]
A.	4.9\[\Omega \]
B.	7.9\[\Omega \]
C.	5.9\[\Omega \]
D.	6.9\[\Omega \]
Answer» B. 7.9\[\Omega \]

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