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A coil of wire enclosing an area 100 cm^...

A coil of wire enclosing an area 100 `cm^2` is placed with its plane making an angle `60^@` with the magnetic field of strength `10^(-1)`T. What is the flux through the coil? If magnetic field is reduced to zero in `10^(-3)` s, then find the induced emf?`

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Calculation of magnetic flux `phi =BA cos theta, ` where `theta= 30^@ = sqrt()3//2^^10^(-11)`Wb Calculation of induced emf E=A cos`theta`dB/dt=0.5V
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Knowledge Check

  • A coil of area 0.4m^(2) has 100 turns. A magnetic field of 0.04 Wb m^(-2) is acting normal to the coil surface. If this magnetic field is reduced to zero in 0.01 s, then the induced emf in the coil is

    A
    160V
    B
    250 V
    C
    270 V
    D
    320 V

  • A coil of radius 1cm and 100 turns is placed in a magnetic field of 10^(6) gauss such that its plane makes an angle 30^(@) with the field . The magnetic flux through the coil in S.I unit is

    A
    `0.5 pi Wb`
    B
    `0.5Wb`
    C
    `0.5xx10^(-4)Wb`
    D
    `5xx10^(-4)Wb`

  • If the magnetic field is doubled through a coil of number of turns 'n' then the induced emf will be

    A
    4 times
    B
    3 times
    C
    two times
    D
    1 times

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