For the same setup of the “Faraday Law” experiment, if the frequency of the magnetic field is changed from 40Hz to 120Hz, how will the emf v

Question

For the same setup of the “Faraday Law” experiment, if the frequency of the magnetic field is changed from 40Hz to 120Hz, how will the emf voltage change? a) will increase three times b) will not change c) will decrease three times d) will change the sign e) will decrease by 80 V f) will increase by 80 V

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Vodka 4 years 2021-08-10T14:09:44+00:00 1 Answers 68 views 0

Answers ( )

  1. Orla
    0
    2021-08-10T14:10:53+00:00
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    Answer:

    Emf will become 3 times

    So option (a) will be correct answer    

    Explanation:

    The expression for induced emf is  e=NAB\omega, here N is number of turns A is  area B is magnetic field and \omega is angular frequency

    From the relation we can say that induced emf is directly proportional to frequency

    It is given that initially voltage is 80 volt and frequency is increases from 40 Hz to 120 Hz

    From the relation we can write \frac{e_1}{e_2}=\frac{f_1}{f_2}

    \frac{80}{e_2}=\frac{40}{120}

    e_2=240volt

    So emf will become 3 times

    So option (A) will be correct option

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