First slide

Phasors and Phasor Diagrams

Question

A $(\frac{150}{π}) m H$ inductor is connected to a 200 V, 50 Hz alternating supply. Then the rms value of current in the circuit is

Moderate

A

5.75 A
B

7.52 A
C

13.33 A
D

15 A

Solution

$\begin{array}{l} X_{L} = ω L = 2 π \times 50 \times \frac{150}{π} \times 10^{- 3} Ω = 15 Ω \\ ∴ I_{r m s} = \frac{200}{15} A = 13.33 A \end{array}$

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