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Ohm's Law and Resistance

A student mea...

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A student measures the terminal potential difference V of a cell of emf E & internal resistance r as a function of the current I flowing through it. The slope and intercept of the graph between V & I respectively equal to.? 1. E & -r 2. -r and E 3. r & -E

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Q. For a cell, a graph is plotted between the potential difference

V

across the terminals of the cell and the current

I

drawn from the cell (figure). The emf and the internal resistance of the cell are

E

r

respectively. Then

Q. A cell of emf

^{'} E^{'}

and internal resistance

^{'} r^{'}

draws a current

^{'} I^{'}

. Write the relation between terminal voltage

^{'} V^{'}

E

I

r

Q. A cell of emf

E

and internal resistance

r

is connected across a resistance

r

. The potential difference between the terminals of the cell must be

Q. A battery of emf

E

and internal resistance

r

is connected across a resistance

R

R

can be adjusted to any value greater than or equal to zero. A graph is plotted between the current

(i)

passing through the resistance and potential difference

(V)

across it. Select the correct alternative(s).

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