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What is the magnitude of the induced EMF?
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[QUOTE="Steve4Physics, post: 6461948, member: 681522"] You mean dΦ/dt = dB/dt*A. This applies when B is changing and A is constant. But in this question B is constant and A changing. So the equation is irrelevant. Try working through these steps. 1. Write an equation for the length (in metres) as a function of time (in seconds). 2. Similarly for width. 3. Using the above, write an expression for the area (in square metres) as a function of time. 4. Since the field is perpendicular to the plane of the loop ##\phi = BA##. Write an expression for ##\frac {d\Phi}{dt}## assuming [B]both[/B] B and A are functions of time (use the product rule). In this question B is constant and A is a function of time. So what is ##\frac {d\Phi}{dt}##? See if you can take it from there. [/QUOTE]
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Introductory Physics Homework Help
What is the magnitude of the induced EMF?
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