Questions
A cell of internal resistance r drives a current through an external resistance R. The power delivered by the cell to the external resistance is maximum when
detailed solution
Correct option is A
let E = e.m.f. of cell and r = its internal resistance. Current through the cell i=ER+rP = Power delivered to .R=i2R=E2R(R+r)2Power delivered will be maximum, whendPdR=E21(R+r)2−2R(R+r)3=0Solving, we get E = rTalk 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
799 666 8865
support@infinitylearn.com
6th Floor, NCC Building, Durgamma Cheruvu Road, Vittal Rao Nagar, HITEC City, Hyderabad, Telangana 500081.
free study material
JEE Mock Tests
JEE study guide
JEE Revision Notes
JEE Important Questions
JEE Sample Papers
JEE Previous Year's Papers
NEET previous year’s papers
NEET important questions
NEET sample papers
NEET revision notes
NEET study guide
NEET mock tests
