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In the relation phi = BA cos theta, thet...

In the relation `phi = BA cos theta, theta` is angle

A

which normal to surface area makes with the direction of magnetic field

B

which magnetic field makes with the surface

C

which is never constant

D

none of the above

Text Solution

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The correct Answer is:
A
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Knowledge Check

  • " If "|{:(sin theta cos phi,,sin theta sin phi,,cos theta),(cos theta cos phi,, cos theta sin phi,,-sin theta),(-sin theta sin phi,,sin theta cos phi,,theta):}| then

    A
    `Delta` is independent of theta
    B
    `Delta` is independent of `phi`
    C
    `Delta `is a constant
    D
    `[(dDelta)/d (theta)]_(theta=pi//2)=0`

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