(A) The terminal potential difference $(V)$ of a cell is given by the equation: $V = \varepsilon - Ir$.Comparing this with the equation of a straight

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(A) The terminal potential difference $(V)$ of a cell is given by the equation: $V = \varepsilon - Ir$.Comparing this with the equation of a straight line $y = mx + c$,where $y = V$ and $x = I$:$V = (-r)I + \varepsilon$.Here,the slope $(m)$ is equal to $-r$ and the $y$-intercept $(c)$ is equal to $\varepsilon$.Therefore,the slope is $-r$ and the intercept is $\varepsilon$.

Class 12 Physics Current Electricity Mix Examples-Current Electricity

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$A$ student measures the terminal potential difference $(V)$ of a cell (of $emf \; \varepsilon$ and internal resistance $r$) as a function of the current $(I)$ flowing through it. The slope and intercept of the graph between $V$ and $I$,respectively,are equal to:

AIPMT 2009 All AIPMT

A
$-r$ and $\varepsilon$
B
$r$ and $-\varepsilon$
C
$-\varepsilon$ and $r$
D
$\varepsilon$ and $-r$

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Current Electricity

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Mix Examples-Current Electricity

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If the cold junction is held at $0^{\circ} C$,the thermo emf $V$ of a thermocouple varies as $V = 10 \times 10^{-6} t - \frac{1}{40} \times 10^{-6} t^2$,where $t$ is the temperature of the hot junction in $^{\circ} C$. The neutral temperature and the maximum value of thermo emf are respectively:

DifficultAP EAMCET 2006

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$A$ 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$(s)$.

Medium

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Which of the following graphs represents the variation of power loss in the external load with external resistance $R$?

Medium

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Two voltmeters $V_1$ and $V_2$ are connected in series in a $D.C.$ circuit. The reading of $V_1$ is $80 \, V$ and its sensitivity is $200 \, \Omega/V$. If the resistance of $V_2$ is $32 \, k\Omega$,what is the total voltage of the circuit in $V$?

Medium

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For a thermocouple,the neutral temperature is $270^{\circ}C$ when its cold junction is at $20^{\circ}C$. What will be the neutral temperature and the temperature of inversion when the temperature of the cold junction is increased to $40^{\circ}C$?

Medium

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$A$ student measures the terminal potential difference $(V)$ of a cell (of $emf \; \varepsilon$ and internal resistance $r$) as a function of the current $(I)$ flowing through it. The slope and intercept of the graph between $V$ and $I$,respectively,are equal to:

Similar Questions

If the cold junction is held at $0^{\circ} C$,the thermo emf $V$ of a thermocouple varies as $V = 10 \times 10^{-6} t - \frac{1}{40} \times 10^{-6} t^2$,where $t$ is the temperature of the hot junction in $^{\circ} C$. The neutral temperature and the maximum value of thermo emf are respectively:

Which of the following graphs represents the variation of power loss in the external load with external resistance $R$?

Two voltmeters $V_1$ and $V_2$ are connected in series in a $D.C.$ circuit. The reading of $V_1$ is $80 \, V$ and its sensitivity is $200 \, \Omega/V$. If the resistance of $V_2$ is $32 \, k\Omega$,what is the total voltage of the circuit in $V$?

For a thermocouple,the neutral temperature is $270^{\circ}C$ when its cold junction is at $20^{\circ}C$. What will be the neutral temperature and the temperature of inversion when the temperature of the cold junction is increased to $40^{\circ}C$?

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