Explanation
L.C. oscillator.
Due to current in straight wire, net magnetic flux from the circular loop is zero. Because in half of the circle magnetic fields are inwards and in other half , magnetic fields are outwards. Therefore change in current will not cause any change in magnetic flux from the loop. So, induced emf under all conditions through the circular loop is zero.
Flux linked with the loop changes as shape of the loop changes.So there will an induced emf and current is induced in the coil. Applying right hand screw rule, we get induced current in anti-clockwise direction.
Cross (×) magnetic field passing from the clsed loop increasing in the direction of ab.
∴ Lenz’s law induced current produces dot (.) magnetic field. The induced currecnt is anti-clockwise in the direcrtion of dc.
When a low flying aircraft passing overhead, a disturbance in picture on our T.V screen is caused. This disturbance is caused due to change in magnetic flux.
When S-pole is moved towards the coil, then face of coil towards magnet become S-pole and current flows clockwise. So, the galvanometer shows deflection to the left. When S-pole moved away from coil, galvanometer shows defelection to right. As flux varies, amplitude will not be constant.
ϵ ∝ l, distance bet n rails.
Current in B1 promptly becomes zero while in B2 becomes slowly zero.
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