Solve
-In the Study of Alternating Electric Current, Capacitive Voltage $V c = - \frac { i } { 2 \pi f } \cos 2 \pi f t$

question 356

Multiple Choice

Solve.
-In the study of alternating electric current, capacitive voltage is given by $V c = - \frac { i } { 2 \pi f } \cos 2 \pi f t$ , where $f$ is the number of cycles per second, $\mathrm { i }$ is the maximum current, and $\mathrm { t }$ is the time in seconds. Solve the equation for t.

• A) \(t = 2 \pi f \operatorname { Arccos } \left( - \frac { 2 \pi \mathrm { fV } _ { \mathrm { C } } } { \mathrm { i } } \right)\)
• B) \(t = 2 \pi f \cos \left( - \frac { 2 \pi \mathrm { fV } _ { \mathrm { C } } } { \mathrm { i } } \right)\)
• C) \( t=\frac{1}{2 \pi f} \operatorname{Arccos}\left(\frac{2 \pi \mathrm{fV}_{\mathrm{C}}}{i}\right) \)
• D) \(t = \frac { 1 } { 2 \pi f } \operatorname { Arccos } \left( - \frac { 2 \pi \mathrm { fV } _ { \mathrm { C } } } { \mathrm { i } } \right)\)

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