Current Electricity and Electrical InstrumentHard
Question
Two identical batteries, each of emf 2V and internal resistance r = 1Ω are connected as shown. The maximum power that can be developed across R using these batteries is :-
Options
A.3.2 W
B.8.2 W
C.2 W
D.4W
Solution
Given circuit can be redraw as
for max power, R =
ΩP = I2 R =
= 2 wattCreate 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
A galvanometer of resistance 100Ω gives full deffection for a current 10−5 A. The value of shunt required to ...Two cells of e.m.f. 10 V & 15 V are connected in parallel to each other between points A & B. The cell of e.m.f. 10 V is...n identical cells are joined in series with its two cells A and B in the loop with reversed polarities. EMF of each cell...The ammeter shown in figure consists of a 480 Ω coil connected in parallel to a 20 Ω shunt. Find the reading o...In a potentiometer experiment the balancing with a cell is at length 240 cm. On shunting the cell with a resistance of 2...