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प्रश्न
An electric motor of power 1000 W, operates at 250 V. Calculate the inductive resistance of the motor and current flowing through it.
संख्यात्मक
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उत्तर
P = 1000 W; p.d. = 250 V; R = ?; I = ?
(i) \[\text{P} =\frac{\text{V}^{2}}{\text{R}}\]
\[\therefore \text{R}=\frac{\text{V}^{2}}{\text{P}}\]
\[= \frac{250 \times 250}{1000}\]
= 62.5 Ω
(ii) \[\text{R} = \frac{\text{V}}{\text{I}}\]
\[\therefore \text{I} = \frac{\text{V}}{\text{R}}\]
\[= \frac{250}{62.5}\]
= 4 A
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