cuongbui1702
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Homework Statement
Homework Equations
That is the solution:
The Attempt at a Solution
I think ε≠Bvl because ε = - dø/dt=- Bd(v.t)/dt, v is not constant.
Why ε=Bvl?
What is the expression for terminal speed in this homework statement?
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That is the solution:
I think ε≠Bvl because ε = - dø/dt=- Bd(v.t)/dt, v is not constant.
Why ε=Bvl?
CAF123
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The induced emf in the loop is related to the change in flux through a surface whose boundary is the loop: $$\epsilon = -\frac{\text{d} \phi}{\text{d}t} = -\frac{\text{d}}{\text{d}t} \int_S \mathbf{B} \cdot \mathbf{dS}$$
In your case, the B field is of constant magnitude and direction and dS instantaneously is Ldx.
In your case, the B field is of constant magnitude and direction and dS instantaneously is Ldx.
dauto
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dø/dt = d(B. Area)/dt = d(BLx)/dt = BL dx/dt = BLv.