Physics · Transformers
दो-वाइंडिंग वाले ट्रांसफार्मर की तुलना में ऑटो-ट्रांसफार्मर का उपयोग केवल तभी अधिक किफायती होता है जब वोल्टेज अनुपात (k) होता है:
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