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प्रश्न
An electric heater with a power of 900 W has a resistance of 36 Ω. Calculate the magnitude of the current and the p.d. at its ends.
संख्यात्मक
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उत्तर
P = 900 W; R = 36 Ω; I = ?; V = ?
\[I = \sqrt{\frac{P}{R}}\]
\[= \sqrt{\frac{900}{36}}\]
\[= \sqrt{25}\]
= 5.0 A
V = I × R
= 5.0 × 36
= 180 V
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