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  • Need clarity, kindly explain! In a coil of resistance 100 , a current is induced by changing the magnetic flux through it as shown in the figure. The magnitude of change in flux through the coil is :

 In a coil of resistance 100 , a current is induced by changing the magnetic flux through it as shown in the figure.  The magnitude of change in flux through the coil is :

  • Option 1)

    200 Wb

     

  • Option 2)

     225 Wb

     

  • Option 3)

     250 Wb

     

  • Option 4)

    275 Wb

 

Answers (1)

best_answer

As we have learned

Induced Charge -

dq= i.dt= \frac{-N}{R}\frac{d\phi }{dt}.dt

dq= \frac{-N}{R}d\phi

 

- wherein

Induced Charge time independent

 

 i = \frac{1}{R }\cdot \frac{d\phi }{dt}

\Delta \phi = R \cdot \Delta q \\ = 100 \Omega \times (Area \: \: of \: \: circular \: \: graph )

= 100 \times (1/2 \times 10 \times 0.56 )= 250 wb

 

 

 

 

 

 

 

 

 

 


Option 1)

200 Wb

 

Option 2)

 225 Wb

 

Option 3)

 250 Wb

 

Option 4)

275 Wb

Posted by

Avinash

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