Easy
Assertion : $A$ larger dry cell has higher $emf$.
Reason : The $emf$ of a dry cell is proportional to its size.
Reason : The $emf$ of a dry cell is proportional to its size.
- AIf both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
- BIf both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
- CIf the Assertion is correct but Reason is incorrect.
- DIf both the Assertion and Reason are incorrect.
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When a resistance of $2\,\Omega$ is connected across the terminals of a cell,the current is $0.5\,A$. When the resistance is increased to $5\,\Omega$,the current is $0.25\,A$. The internal resistance of the cell is ............. $\Omega$.
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View SolutionFor two cells having the same $EMF$ $E$ and internal resistance $r$, the current passing through an external resistor of $6 \ \Omega$ is the same when both cells are connected either in parallel or in series. The value of internal resistance $r$ is . . . . . . $ \ \Omega$.
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View SolutionWhat is called the internal resistance of a cell?
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View SolutionIn charging a battery of a motor car,which of the following effects of electric current is used?
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