A thin strip 10 cm long is on U shaped wire of negligible resistance and it is connected to a spring of spring constant 
(see figure). The assembly is kept in a uniform magnetic field of 0.1 T. If the strip is pulled from its equilibrium position and released, the number of oscillation it performs before its amplitude decreases by a factor of 
is N. If the mass of the strip is 50 grams, its resistance 
and air drag negligible, N will be close to
Text Solution
Verified by ExpertsThe correct answer is:
C
JEE MAIN 2019
∴ No of oscillation 
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