A coil has an inductance of 3 H. The ratio o | vedclass

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(C) कुंडली का प्रेरकत्व $L = 3 \ H$ है।$a.c.$ स्रोत के लिए, प्रेरणिक प्रतिघात (inductive reactance) $X_L = \omega L = 2 \pi f L$ होता है।$d.c.$ स्रोत

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infinite

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(C) कुंडली का प्रेरकत्व $L = 3 \ H$ है।$a.c.$ स्रोत के लिए, प्रेरणिक प्रतिघात (inductive reactance) $X_L = \omega L = 2 \pi f L$ होता है।$d.c.$ स्रोत के लिए, आवृत्ति $f = 0$ होती है, इसलिए प्रेरणिक प्रतिघात $X_{dc} = 2 \pi (0) L = 0$ होता है।प्रश्न के अनुसार, $a.c.$ प्रतिघात और $d.c.$ प्रतिघात का अनुपात $\frac{X_L}{X_{dc}} = \frac{\omega L}{0} = \infty$ (अनंत) होगा।अतः, सही विकल्प $C$ है।

$A$ coil has an inductance of $3 \ H$. The ratio of its reactance when it is first connected to an a.c. source and then to a d.c. source is:

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