Solve the Problem $\mathrm { E }$ In an Electrical Circuit Is Given By

question 15

Multiple Choice

Solve the problem.
-The voltage $\mathrm { E }$ in an electrical circuit is given by $\mathrm { E } = 1.9 \cos 140 \pi \mathrm { t }$ , where $\mathrm { t }$ is time measured in seconds. Find the period.

• A) \(70 \pi\)
• B) 70
• C) \(\frac { 1 } { 70 }\)
• D) \(\frac { \pi } { 70 }\)

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