Questions
An electric cable having a resistance of 0.4 delivers 10 kW at 200 v dc to a factory. The efficiency of transmission is
detailed solution
Correct option is D
Power loss in the cable =i2R=(P/V)2R=100002002×0⋅4=1000W=1kWη= Power delivered by the cable to factory Power supplied to the cable =1010+1=1011=0⋅909≈91%Talk to our academic expert!
Similar Questions
A resistor R is connected across a battery of emf 12 V. It observed that terminal potential differenceis 9 V and the power delivered to resistor is 18 W. Internal resistance of the battery ‘r’ and the resistance R are respectively
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