allery200 V ত 100 W ৰেটিং পোৱা এটা লেম্প 5 h ৰ বাবে 100 V ত চলে। ধ্ৰুৱক প্ৰতিৰোধ ক্ষমতা ধৰি লওক। প্ৰতি কিলোৱাট ঘণ্টাত ₹8 ত ইয়াৰ খৰচ কিমান?
A₹8
B₹1
C₹4
D₹2
Answer & Solution
Correct answer: B. ₹1
ইয়াৰ ৰেজিষ্টেন্স 400 Ω, গতিকে 100 V ত ই 25 W ব্যৱহাৰ কৰে, 5 h ত 0.125 kWh খৰচ কৰে আৰু খৰচ ₹1।
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