Two to roads 1 and 2 have total number of turns 200 and 100 respectively with average radii 40 cm and 20 cm respectively. If they carry same current 
, the radio of the magnetic fields along the two loops is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
A
For a toroid magnetic field, 
Where, 
number ofturns per unit length 
Now, 
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