Questions
48 cells each of internal resistance are arranged in a mixed combination and the combination is connected across a resistor of resistance . Number of cells in each row is n and number of rows is m if maximum current flows through the resistor, then
detailed solution
Correct option is B
mn=N ....(1) and for maximum current, mR=Nr ......(2)From (1) and (2), m=NrR=48×13=4 and n=484=12Talk to our academic expert!
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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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