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  • A  resistor and a 0.21 henry inductor are connected in series to an a.c. source operating at 20 volt,

A 12 \Omega resistor and a 0.21 henry inductor are connected in series to an a.c. source operating at 20 volt, 50 cycle. The phase angle between the current and source voltage is

Option: 1

30°


Option: 2

40°


Option: 3

80°


Option: 4

90°


Answers (1)

best_answer

The phase angle is given by
\mathrm{\begin{aligned} & \tan \phi=\frac{\omega \mathrm{L}}{\mathrm{R}}=\frac{2 \pi \times 50 \times 0.21}{12} \\ & =5.5 \\ & \phi=\tan ^{-1} 5.5=80^{\circ} \end{aligned}}

Posted by

shivangi.bhatnagar

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