Home
Class 12
PHYSICS
A cell of emf epsilon and internal resis...

A cell of emf `epsilon` and internal resistance r is charged by a current I, then

A

the cell stores chemical energy at the rate of `epsiloni`

B

the cell stores chemical energy at the rate of `i^2r`

C

the cell stores chemical energy at the rate of `epsilon I - i^2r `

D

the storage of chemical energy rate cannot be calculated

Text Solution

Verified by Experts

The correct Answer is:
C
c. From work-energy theorem, we get `Delta = epsiloni - i^2r`.
Promotional Banner

Similar Questions

Explore conceptually related problems

A cell of emf epsilon and internal resistance r gives a current of 0.5 A with an external resistance of 12 Omega and a current of 0.25 A with an external resistance of 25 Omega . Calculate (a) internal resistance of the cell and (b) emf of the cell.

A cell of emf epsilon and internal resistance r drives a current i through an extermal resistance R (i) The cell suppllied epsilon i power (ii) Heat is produced in R at the rate epsilon i (iii) Heat is produced in R at the rate epsilon I ((R )/(R+r)) (iv) Heat is produced in the cell at the rate epsilon i((r ?/(R+r))

A student measures the terminal potential difference (V) of a cell (of emf epsilon and internal resistance r ) as a function of the current (I) flowing through it. The slope and intercept of the graph between V and I , then respectively, equal

A battery of emf epsilon and internal resistance r sends currents I_(1) and I_(2) , when connected to external resistance R_(1) and R_(2) respectively. Find the emf and internal resistance of the battery.

A cell of emf epsilon and internal resistance r is connected across a variable load resistance R . It is found that when R = 4 Omega the current is 1A and when R is increased to 9 Omega , the current reduces to 0.5A . Find the value of the emf epsilon and internal resistance r

A cell of emf epsilon and internal resistance r is connected across a variable resistor R. Plot a graph showing variation of terminal voltage V of the cell versus the current I. Using the plot, show how the emf of the cell and its internal resistance can be determined.

A cell of emf epsilon and internal resistance r is connected across a load resistance R (i) Find the maximum power delivered at the load ? (ii) Draw the power (P ) vs load resistance ( R ) graph.

An accumulator battery (storage cell) B of emf epsilon and internal resistance r is being charged from DC supply whose terminals are T_1 and T_2 .

N cells, each of emf epsilon and internal resistance r, are arranged in a ring in series. Two points including n cells on one side and N-n cells on the other side are connected to a resistor R. Calcualte the current through R (figure)