Aim long metal rod XY completes the circuit as shown in figure. The plane of the circuit is perpendicular to the magnetic field of flux density 0.15 T. If the resistance of the circuit is 5 
, the force needed to move the rod in direction, as indicated, with a constant speed of 4 m s -1 will be_______10 -3 N.
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
(18)
The force on the rod is given by
F = ilB
…(i)
The data given is
R = 5 
= 1m
v = 4 m s -1 B = 0.15 T
Substituting the values in equation (i)
= 18 x 10
-3 N
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