Induced EMF in a coil problem

  • #1
1. A 100-turn, 2.0-cm-diameter coil is at rest in a horizontal plane. A uniform magnetic field 60 degrees away from vertical increases from 0.50 T to 1.50 T in 0.60 s.



2. EMF = N*d(phi)/dt
phi = flux = ABcos(theta)




3. dB/dt = 1/0.6
EMF = 1000*(1/0.6)*pi*r2*0.5 = 0.262 V

Is that correct? Should the sign be negative?
 

Answers and Replies

  • #2
ideasrule
Homework Helper
2,266
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Is there a reason you're using 1000 turns when the question says 100?

Otherwise, the numerical value is correct. By convention, it should be negative.
 

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