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A nonconducting disc having uniform positive charge Q, is rotating about its axis in anticlockwise direction with uniform angular velocity ω. The magnetic field at the center of the disc is.
  • a)
    having magnitude 
  • b)
    directed outward
  • c)
    directed inwards
  • d)
    having magnitude 
Correct answer is option 'B,D'. Can you explain this answer?
Verified Answer
A nonconducting disc having uniform positive chargeQ, is rotating abou...
Consider a ring of radius x and thickness dx.
Equivalent current in this ring 
dB (due to this ring) 

The correct answers are: directed outward, having magnitude 
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Most Upvoted Answer
A nonconducting disc having uniform positive chargeQ, is rotating abou...
Consider a ring of radius x and thickness dx.
Equivalent current in this ring 
dB (due to this ring) 

The correct answers are: directed outward, having magnitude 
Free Test
Community Answer
A nonconducting disc having uniform positive chargeQ, is rotating abou...
Consider a ring of radius x and thickness dx.
Equivalent current in this ring 
dB (due to this ring) 

The correct answers are: directed outward, having magnitude 
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A nonconducting disc having uniform positive chargeQ, is rotating about its axis in anticlockwise direction with uniform angular velocityω.The magnetic field at the center of the disc is.a)having magnitudeb)directed outwardc)directed inwardsd)having magnitudeCorrect answer is option 'B,D'. Can you explain this answer?
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