Induced emf:

$\overline{){\mathbf{\epsilon}}{\mathbf{=}}{\mathbf{-}}\frac{\mathbf{d}\mathbf{\varphi}}{\mathbf{d}\mathbf{t}}}$

Magnetic flux:

$\overline{){\mathbf{\varphi}}{\mathbf{=}}{\mathbf{B}}{\mathbf{A}}{\mathbf{c}}{\mathbf{o}}{\mathbf{s}}{\mathbf{}}{\mathbf{\theta}}}$

θ = 0°

Φ = BA

The earth's magnetic field strength is 5.0x10^{-5} T. How fast would you have to drive your car to create a 4.0 V motional emf along your 1.0 m -long radio antenna? Assume that the motion of the antenna is perpendicular to .

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