Questions
What should be the value of resistance R in the circuit shown in figure so that the electric lamp consumes the rated power?
detailed solution
Correct option is B
The electric lamp consumes the rated power if the voltage across electric lamp is 3 V.∴ resistance across AB is 4.5 ΩResistance of lamp, Rb= V2Pb = 320.5= 18 ΩRRbRb=4.5 Ω ; 18 R = 92 18+R ⇒ R=6 ΩTalk 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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