Physics-
General
Easy
Question
A cell is connected between the points A and C of a circular conductor ABCD with O as centre and angle 
If 
and 
are the magnitudes of the magnetic fields at O due to the currents in ABC and ADC respectively, then ratio 
is
- 1
- 2
- 5
- 6
The correct answer is: 5
From Biot-Savart law the magnetic field at the centre is directly proportional to the length of current carrying segment.
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