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Standard XII
Physics
Mixed Combination of Cells
24. terminal ...
Question
24. terminal potential difference (v) of a cell(emf E and internal resistance r) is measured as a function of current(I) flowing through it. The slope and intercept of graph between Vand I then respectively are equal to -r and E how?
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Q.
A student measures the terminal potential difference
(
V
)
of a cell (of emf
ε
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
are respectively equal to
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
and
r
respectively. Then
Q.
A battery of emf
E
and internal resistance
r
is connected across a resistance
R
. Resistance
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).
Q.
The values of current (I) flowing through a given resistor of resistance (R), for the corresponding values of potential difference (V) across the resistor are given below :
V (volts)
0.5
1.0
1.5
2.0
2.5
3.0
4.0
5.0
I (amperes)
0.1
0.2
0.3
0.4
0.5
0.6
0.8
1.0
Plot a graph between current (I) and potential difference (V) and determine the resistance (R) of the resistor.
Q.
The emf of a cell is
ε
and its internal resistance is
r
. Its terminals are connected to a resistance
R
. The potential difference between the terminals is
1.6
V
for
R
=
4
Ω
, and 1.8 V for
R
=
9
Ω
. Then
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