Induced Voltage Calculation for Stick in Magnetic Field B

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Homework Help Overview

The discussion revolves around calculating the induced voltage for a stick moving through a magnetic field. The stick is specified to be 91 cm long and is subjected to an acceleration of 1 m/s² in a magnetic field of 0.606 T. The original poster is attempting to find the induced voltage at a specific time of 288 ms.

Discussion Character

  • Exploratory, Assumption checking, Conceptual clarification

Approaches and Questions Raised

  • The original poster attempts to use a formula involving the magnetic field and acceleration to calculate induced voltage but questions the validity of their result. Another participant points out a flaw in the equation used, suggesting that it leads to nonsensical conclusions for a stationary object.

Discussion Status

Participants are actively engaging in clarifying the correct formula for induced voltage. The original poster acknowledges a mistake in their initial equation and seems to be moving towards a better understanding, although no definitive resolution has been reached.

Contextual Notes

There is a mention of the need to express the final answer in millivolts, which may influence the calculations. The discussion reflects uncertainty regarding the correct application of the equations involved in electromagnetic induction.

Petkovsky
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OK, so we have a stick 91cm long which is accelerated by 1m/s/s in a magnetic field B= 0.606T.

I need to find the induced voltage at time t = 288ms.

So U = B/V which is B/(a*t)

When i calculate i get 2 Volts which i think is too much. Plus the solution should be given in mV. Is this the correct result or I'm doing something wrong?
 
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Petkovsky said:
So U = B/V which is B/(a*t)

Uh, that equation is wrong. For one thing, it says a motionless stick (V=0) would generate an infinite amount of EMF!

What is the equation for EMF or U in terms of area and magnetic field?
 
Oh, sorry it's B * L * V, i missinterpreted l and /. Tnx, anyway it is a stupid equation the way i wrote it, I should have seen that.
 
No problem. If you're still stuck post again, but it sounds like you have it now.
 

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