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75% দক্ষতা সম্পন্ন একটি মোটরের ক্ষমতা 200W । এটি প্রতি সেকেন্ডে কত জুল কাজ করে?
150 J
75 J
266.7 J
50 J
ANSWER : 1
Descrption
<p>We know,</p><p>η=(P<sub>1</sub>/P)×100%</p><p>Given,</p><p>η=75%</p><p>P=200W</p><p>From Equation,</p><p>75%=(P<sub>1</sub>/200)×100%</p><p>75=P<sub>1</sub>/2</p><p>P<sub>1</sub>=75×2</p><p>P<sub>1</sub>=150</p><p>So,P<sub>1</sub>=150 J</p><p> </p>
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