A) Zero in vertical position and \[1\times {{10}^{-3}}V\]in horizontal position
B) \[1\times {{10}^{-3}}V\]in vertical position and zero is horizontal position
C) Zero in both cases
D) \[1\times {{10}^{-3}}V\]in both cases
Correct Answer: B
Solution :
If player is running with rod in vertical position towards east, then rod cuts the magnetic field of earth perpendicularly (magnetic field of earth is south to north). Hence Maximum emf induced is \[e=Bvl=4\times {{10}^{-5}}\times \frac{30\times 1000}{3600}\times 3=1\times {{10}^{-3}}volt\] When he is running with rod in horizontal position, no field is cut by the rod, so e = 0.You need to login to perform this action.
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