# Electromotive Force : Minimizing Time

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For an electric circuit, let V=cos 2pi(t) model the electromotive force in volts at t seconds.

find smallest positive value of t where 0<and= to t<and= to 1/2 for the values

a) V=0

b) V=.5

c) V=.25

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##### Solution Summary

Minimum time is linked to voltage in this electromotive force problem.

##### Solution Preview

a) sub to get 0 = cos(2pi*t)

but we know that cos is 0 at pi/2 hence

2pi*t = pi/2

t = ...

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