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Debanjana adhikari Asked a Question
June 1, 2020 3:41 pmpts 30 pts
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Q38. an infinite solenoid carries a time varying current 7(t)= a, with a*0. the axis of the solenoid is along the direction. f and 6 are the usual radial and po

Q38. An infinite solenoid carries a time varying current 7(t)= A, with A*0. The axis of the solenoid is along the direction. f and 6 are the usual radial and polar directions in cylindrical polar coordinates. B= B+ B,0 + B_£ is the magnetic field at a point outside the solenoid. Which one of the following statements is true? (a) B =0, B, =0, B, = 0 (c) B, 0, B, 0, B, #0 (b) B, #0,B, +0, B = 0 (d) B, = 0, B, =0, B, + 0
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  • Vaishnavi rajora thankyou
    whenever we have time varying current or current is the function of time magnetic field outside the soleniod will not be zero
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    Vaishnavi rajora
    i hope dear it will help u
  • Debanjana adhikari
    Bt in general magnetic field outside the solenoid is always zero....so why not option a)
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    Vaishnavi rajora
    dear, magnetic field is zero outside solenoid.....but only for steady current.....see i'm attatching a pic in comment box.
  • Ruby negi thankyou
    option d is correct because the current is in theta direction(means currents flows in solenoid ) therefore according to right hand thumb rule,when you curl your finger (as fingers ...
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