First slide

Phasors and Phasor Diagrams

Question

An alternating voltage E (in volt) 200 $\sqrt{2}$ sin ( 100t) is connected to a 1 μF capacitor through an ac ammeter. The reading of the ammeter shall be :

Moderate

A

10 mA
B

20 mA
C

40 mA
D

80 mA

Solution

Reading of ammeter = $I_{rms} = \frac{V_{rms}}{Z} = \frac{200}{\frac{1}{(100) (1 x 10^{- 6})}} = 20 mA$

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