NEET Class neet Answered
The square loop of side length 2cm is induced in the magnetic field of 3T with a speed of 1cm/s. Find out the induced EMF after 1s, 5s and 25s. The square loop is being moved towards right at a constant speed 1 cm/s.
Asked by patra04011965 | 04 Nov, 2020, 09:55: AM
Expert Answer
induced emf ξ = - dφ / dt
where flux φ = ( B × A ) , B is flux density of magnetic field and A area of loop.
Hence , we get , induced emf ξ = - B × ( dA/dt ) = -B l × (dw/dt)
where dw/dt is constant speed of movement of loop i.e., 1 cm/s
Let us assume time is counted just the rigt edge loop enters magnetic field region.
at t = 1 s, induced emf ξ = - 3 × 2 × 10-2 × 1 × 10-2 = 6 × 10-4 V = 0.6 mV
at t = 5 s, loop is completely inside magnetic field region, hence there is no change in magnetic flux with respect to time.
Hence at t= 5 s, induced emf ξ = 0
at t = 25 s, loop is completely outside magnetic field region, hence there is no change in magnetic flux with respect to time.
Hence at t= 5 s, induced emf ξ = 0
Answered by Thiyagarajan K | 04 Nov, 2020, 02:19: PM
Application Videos
-
Growth of Current in L-R Circuit
In this video, the growth of current in RL circuit is explained. It include...
NEET neet - Physics
Asked by praveenpriya000079 | 18 Apr, 2024, 07:24: AM
ANSWERED BY EXPERTNEET neet - Physics
Asked by gouranshi84 | 17 Apr, 2024, 05:23: PM
ANSWERED BY EXPERTNEET neet - Physics
Asked by sojusvi | 17 Apr, 2024, 01:12: PM
ANSWERED BY EXPERT
