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Referring to the previous illustration w...

Referring to the previous illustration what will be the induced e.m.f at any instant if the loop is rotated an axis passing through the centre and parallel to the length ?

Text Solution

Verified by Experts

The flux linked through the loop at any instant is
`phi` = BA cos `omega`t .
`therefore` the induced e.m.f at any instant is `epsilon = (d phi )/(dt)`
`rArr epsilon = -(d)/(dt)`(Blb cos `omega`t)
`rArr epsilon = `+(Blb `omega"sin"omega`t)
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Knowledge Check

  • A cylinder of 500 g and radius 10 cm has moment of inertia about an axis passing through its centre and parallel to its length is

    A
    `2.5xx10^(-3)kg m^(2)`
    B
    `2xx10^(-3)kg m^(2)`
    C
    `5xx10^(-3)kg m^(2)`
    D
    `3.5xx10^(-3)kg m^(2)`

  • The moment of inertia of a copper disc, rotating about an axis passing through its centre and perpendicular to its plane

    A
    increases if its temperature is increased
    B
    changes if its axis of rotation is changed
    C
    increases if its angular velocity is increased
    D
    both (a) and (b) are correct

  • What is the equation of the line passing through (2, -3) and parallel to Y-axis

    A
    `Y=-3`
    B
    `Y=2`
    C
    `X=2`
    D
    `X=-3`