A) x
B) \[2{{x}^{2}}\]
C) \[\frac{{{x}^{2}}}{2}\]
D) 4x
Correct Answer: A
Solution :
If \[{{R}_{XY}}\,\,and\,\,{{R}_{YZ}}\] are the resistance of wire of length XY and YZ, then condition for no deflection is \[\frac{{{R}_{A}}}{{{R}_{B}}}=\frac{{{R}_{XY}}}{{{R}_{YZ}}}\] of radius of wire XZ is doubled, the ratio \[\frac{{{R}_{XY}}}{{{R}_{YZ}}}\] will remain same. So, balance length will remain same.You need to login to perform this action.
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