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Magnetic flux is considered one of the most asked concept.
19 Questions around this concept.
A square loop of side 4 cm is lying on a horizontal table. A uniform magnetic field of 0.5 T is directed towards at an angle of 60° to the vertical as shown in figure. If the field
increases from zero to its final value in 0.2s, the e.m.f. induced in the loop will be
A small loop of the area of the cross section is lying concentrically and coplanar inside a bigger loop of radius 0.628 m. A current of 10 A is passed in the bigger loop. The smaller loop is rotated about its diameter with an angular velocity
. The magnetic flux linked with the small loop will be :
A series combination of an inductance (L) and a resistance (R) is connected to a battery of emf E. The final value of current depends on
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Two concentric coplanar circular loops 1 and 2 are shown in the Fig 19. The radii of the loops are r and R. Current I flows in the loop
1. Find the magnetic flux through the loop 2 if r << R
Two coils A and B are separated by a certain distance. If a current of 4 A flows through A, a magnetic flux of Wb passes through B (no current through B). If no current passes through A and a current of 2A passes through B, then the flux through A is:
The magnetic flux linked with a coil of N turns of area of cross-section A held with its plane parallel to the field B is:
A circular disc of radius 0.2 m is placed in a uniform magnetic field of induction in such a way that its axis makes an angle of 60° with B. The magnetic flux linked with the disc is:
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A uniform but time varying magnetic field is present in a circular region of radius R. The magnetic field is perpendicular and into the plane of the loop and the magnitude of field is increasing at a constant rate . There is a straight conducting rod of length 2R placed as shown in figure. The magnitude of induced emf across the rod is:
Magnetic flux-
The total number of magnetic lines of force passing normally through an area placed in a magnetic field is equal to
the magnetic flux linked with that area.
I.e for the below figure
Net magnetic flux through the surface is given by
where
Magnetic Flux
Magnetic field
The angle between area vector and magnetic field vector
It's S.I. unit is Weber (wb) or and its C.G.S. unit is maxwell(Mx).
and and
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