allery100 W रेटेड लैंप 200 V पर 100 V पर 5 h के लिए चलता है। निरंतर प्रतिरोध मान लें. ₹8 प्रति kWh पर, इसकी लागत क्या है?
A₹8
B₹1
C₹4
D₹2
Answer & Solution
Correct answer: B. ₹1
इसका प्रतिरोध 400 Ω है, इसलिए 100 V पर यह 25 W का उपयोग करता है, 5 h में 0.125 kWh की खपत करता है और लागत ₹1 है।
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