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Physics - Current Electricity Question with Solution | TestHub

PhysicsCurrent ElectricityBatteryEasy2 minQB

PhysicsEasysingle choice

A cell of emf E having an internal resistance 'r' is connected to an external resistance R. The potential difference 'V' across the resistance R varies with R as shown by the curve:

Options:

Answer:

Solution:

$V = E - ir = - \frac{Er}{R + r} = E [\frac{R + r - r}{R + r}]$

$V = \frac{ER}{(R + r)}$

$\Rightarrow V = 0 at R = 0$

$V = E at R = \infty$

Stream:JEESubject:PhysicsTopic:Current ElectricitySubtopic:Battery

⏱ 2mℹ️ Source: QB

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