A 20 m long uniform copper wire held horizontally is allowed to fall under the gravity ( 
) through a uniform horizontal magnetic field of 0.5 Gauss perpendicular to the length of the wire. The induced EMF across the wire when it travells a vertical distance of 200 m is 
mV.
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
For a conducting wire falling in a magnetic field, induced EMF is: 
After falling through height 
, velocity: 
Converting magnetic field: 
Gauss 
Induced EMF: 
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