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  • Solve! A student measures the terminal potential difference (V) of a cell (of emf E 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 student measures the terminal potential difference (V) of a cell (of emf E 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:

  • Option 1)

    -r and E

  • Option 2)

    r and - E

  • Option 3)

    - E and r

  • Option 4)

    E and -r

 

Answers (1)

best_answer

 

Equation of cell -

E=V+iR

- wherein

(E>V)

 

 V=E-Ir----------(1)

compare with straight line equation y=mx+c

Slope =-r, Intercept =E


Option 1)

-r and E

This is correct option 

Option 2)

r and - E

This is incorrect option 

Option 3)

- E and r

This is incorrect option 

Option 4)

E and -r

This is incorrect option 

Posted by

Plabita

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