Current Electricity and Electrical InstrumentMedium
Question
A cell of emf ε and internal resistance r drives a current i through an external resistance R.
Options
A.The cell is generating ε i power
B.Heat is produced in R at the rate ε i
C.Heat is produced in R at the rate ε i 
D.Heat is produced in the cell at the rate ε i 
Solution
current i = 
cell generating power = εi
Heat produced in R at the rate i2R = iR.
= εi 
Heat produced in r at the rate = i2r = εi
Create a free account to view solution
View Solution FreeTopic: Current Electricity and Electrical Instrument·Practice all Current Electricity and Electrical Instrument questions
More Current Electricity and Electrical Instrument Questions
In a potentiometer experiment a voltage source is balanced at 60cm length where as a 3 volt battery is balanced at 45cm ...If internal resistance of a cell is proportional to current drawn from the cell. Then the best representation of termina...A uniform metallic wire having resistance $4\Omega$ is bent to form a square loop ( $ABCD$ ) (see figure). A resistance ...A potentiometer circuit has been set up for finding the internal resistance of a given cell. The main battery, used acro...An electric bell has a resistance of 5Ω and requires a current of 0.25 A to work it. Assuming that the resistance o...