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Electricity and Magnetism

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Frequency of Alternation Current

EANDM-NFBTOJ

The current in a circuit is oscillating according to the equation $I(t)=(2\pi)sin(\pi t)\,Amp$.

What is the peak amplitude of the current?
What is the frequency of the oscillation (in Hertz)?

A

$I_{peak}=2\pi\,Amp$
$f=\pi\,Hz$

B

$I_{peak}=2\pi\,Amp$
$f=1\,Hz$

C

$I_{peak}=\bigg(\cfrac{2\pi}{\sqrt{2}}\bigg)\,Amp$
$f=0.5\,Hz$

D

$I_{peak}=2\pi\,Amp$
$f=0.5\,Hz$