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Question
7২% দক্ষতা সম্পন্ন একটি মোটরের ক্ষমতা 200W । এটি প্রতি সেকেন্ডে কত জুল কাজ করে?
144 J
45 ft
244 J
245 J
ANSWER : 1
Descrption
<p>দেওয়া আছে,</p><p>কর্মদক্ষতা, η=72%</p><p>ক্ষমতা, P<sub>in</sub>=200W</p><p>আমরা জানি,</p><p>η=(P<sub>out </sub>/P<sub>in</sub>)×100%</p><p>72%=(P<sub>out</sub>/200)×100%</p><p>72=P<sub>out</sub>/2</p><p>P<sub>out</sub>=72×2</p><p>P<sub>out</sub>=144W</p><p>আবার, আমরা জানি, </p><p>ব্যয়িত শক্তি, W=(P<sub>out</sub>×T) J</p><p>W=(144×1) J</p><p>W=144 J</p>
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