Find the EMF generated by a guitar string in the pickup coils

AI Thread Summary
To find the EMF generated by a guitar string in the pickup coils, it's essential to apply the correct electromagnetic induction principles. The discussion highlights the need to identify the specific equation being used, particularly focusing on the variables N (number of turns) and A (area of the coil), along with the time-varying magnetic field B. The derivative of the magnetic field with respect to time, dB/dt, is crucial for calculating the induced EMF. A hint suggests that the answer may be zero, indicating a potential misunderstanding of the problem's parameters. Understanding these concepts is vital for accurately determining the EMF in this context.
b1llso
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Homework Statement
A string of acoustic guitar vibrates. The component of the magnetic field perpendicular to the area of a proximal amplifier coil is given by
B = 50.0 mT + (3, 20mT) sin (2π523t).
The circular amplifier coil has 30 turns and a radius of 2.70 mm. Find the induced EMF in the coil as a function of time.
Relevant Equations
B = 50,0 mT + (3, 20mT) sin(2π523t)
I tried using the general EMF equation but don't know how to apply it with the equation from the problem
 
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Hi b1llso. Welcome to PF!

I am not sure what equation you are using. What is the law that you are applying?

Hint: You are given N and A for the coil and you are given the magnetic field B through the coil as a function of time t. What is dB/dt?

AM
 
The answer they don't want: Zero

It's an Acoustic guitar and it uses Silk strings
...or Nylon ones.:wink:
 
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