Current through the \(2~\Omega\) resistance in the electrical network shown is:

      

1. zero 2. \(1\) A
3. \(3\) A 4. \(5\) A
Subtopic:  Grouping of Cells |
 77%
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Two batteries, one of emf \(18~\text{V}\) and internal resistance \(2~\Omega\) and the other of emf \(12\) V and internal resistance \(1~\Omega\), are connected as shown. Reading of the voltmeter is:
(if voltmeter is ideal)

           

1. \(14\) V
2. \(15\) V
3. \(18\) V
4. \(30\) V

Subtopic:  Grouping of Cells |
 78%
From NCERT
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A battery consists of a variable number \('n'\) of identical cells having internal resistances connected in series. The terminals of battery are short circuited and the current \(i\) is measured. The graph below that shows the relationship between \(i\) and \(n\) is:

1.   2.
3. 4.
Subtopic:  Grouping of Cells |
 71%
From NCERT
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