Question: Q. 1. A square of side L meters lies in the xy plane in a region where the magnetic field is given by B=B0(2i^+3j^+4k^) Tesla, where B0 is constant. The magnitude of flux passing through the square is (a) 2B0L2 Wb. (b) 3B0L2 Wb. (c) 4B0L2 Wb. (d) 29B0L2Wb

[NCERT Exemplar]

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Solution:

Ans. Correct option : (c)

Explanation: Magnetic flux is defined as the total number of magnetic lines of force passing normally through an area placed in a magnetic field and is equal to the magnetic flux linked with that area.

Square lies in xy plane in B so A=L2k^

Q=B.A

=B0(2i^+3j^+4k^)(L2k^)

=B0[2×i^k^+3×j^k^+4×k^k^]

=B0L2[0+0+4]

=4B0L2 W.



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