Question

If magnetic field is given by B= (2i + 3j -8k) and a loop of area 10 sq.m is placed in field in y-z plane , max flux will be
A) -20 wb
B) 30 wb
C) 20 wb
D) 80 wb

NO SPAM PLS. KINDLY EXPLAIN STEP BY STEP. THANKS!​

Answer 1

Flux is the measure of field lines. It indicates how much electric field lines cross a given area.

The formula to calculate flux that will be used is

Ф = B.A

Given, B = 2i + 3j -8k

    The loop is placed in y-z plane

So, the area will be in the x-direction

    A= 10i

Ф = (2i + 3j -8k) · 10i

   =20 wb.

The correct answer will be option c.