allery200 V এ 100 W রেট করা একটি বাতি 5 h এর জন্য 100 V এ চলে। ধ্রুব প্রতিরোধ অনুমান. প্রতি kWh-এ ₹8, এর দাম কত?
A₹8
B₹1
C₹4
D₹2
Answer & Solution
Correct answer: B. ₹1
এর প্রতিরোধ ক্ষমতা 400 Ω, তাই 100 V এ এটি 25 W ব্যবহার করে, 5 ঘন্টায় 0.125 kWh খরচ করে এবং ₹1 খরচ করে।
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