allery200 V वर 100 W रेट केलेला दिवा 5 h साठी 100 V वर चालतो. सतत प्रतिकार गृहीत धरा. ₹8 प्रति kWh वर, त्याची किंमत किती आहे?
A₹8
B₹1
C₹4
D₹2
Answer & Solution
Correct answer: B. ₹1
त्याची प्रतिकारशक्ती 400 Ω आहे, म्हणून 100 V वर ते 25 W वापरते, 5 h मध्ये 0.125 kWh वापरते आणि त्याची किंमत ₹1 आहे.
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