Home
Class 12
PHYSICS
A cell of emf E and internet resistance ...

A cell of emf E and internet resistance r draws a current I. Write the relation between terminal voltage V in terms of E, I and r.

Text Solution

Verified by Experts

V = E-lr
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • CURRENT ELECTRICITY - I AND II

    PATHFINDER|Exercise QUESTION BANK|244 Videos

Similar Questions

Explore conceptually related problems

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

Four cells, each of emf E and internal resistance r , are connected in series across an external resistance R By mistake one of the cells is connected in reverse. Then the current in the external circuit is

Knowledge Check

  • A cell of e.m.f. E and internal resistance r is connected in series with an external resistance nr. Then, the ratio of the terminal potential difference to E.M.F. is

    A
    `1/n`
    B
    `1/(n+1)`
    C
    `n/(n+1)`
    D
    `(n+1)/n`

  • A cell of emf E and internal resistance r is connected to a variable external resistor R. the graph which gives the terminal voltage of cell V with respect to R is

    A
    B
    C
    D

  • A cell of E.M.F. E and internal resistance r supplies currents for the same time t through external] resistances R_1 and R_2 respectively. If the heat produced in both cases is the same then the internal resistance is given by

    A
    `1/r=1/R_1+1/R_2`
    B
    `r=(R_1+R_2)/2`
    C
    `r=sqrt(R_1R_2)`
    D
    `r=R_1+R_2`

    • Similar Questions

    Explore conceptually related problems

    n electric cells of emf e and internal resistance r each are connected in series.What is the emf of this combination.

    Two identical cells each of emf E and internal resistance r are connected in parallel with an external resistance R. To get maximum power developed across R, the value of R is

    A cell of emf 2.1 V and 0.1 Omega internal resistance sends 100 mA current in an external circuit. Determine the external resistance,terminal potential difference across that resistance and internal potential drop of the cell.

    Two cells each of emf e but internal resistances r_1 and r_2 are connected in series through an external resistance R. IF the potential difference across the first cell is zero while current flows,the relation of R in terms of r_1 and r_2 is

    n identical cells, each of emf e and internal resistance r, are first connected in series and then in parallel. What will be the ratio of the emfs and of the internal resistances of these two cell combinations?

    Home
    Profile