- 1(current)
Q. No.A battery consists of a variable number \(n\) of identical cells (having internal resistance \(r\) each) which are connected in series. The terminals of the battery are short-circuited and the current \(I\) is measured. Which of the graphs shows the correct relationship between \(I\) and \(n?\)
| 1. |  |
2. |  |
| 3. |  |
4. |  |
Subtopic: Grouping of Cells |
67%
Level 2: 60%+
NEET - 2018
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Ten identical cells connected in series are required to heat a wire of length \(1\) metre and radius \(r\) by \(10^\circ ~\text{C}\) in time \(t.\) How many cells will be needed to heat a wire of length \(2\) metres with the same radius by the same temperature in the same time \(t?\)
| 1. | \(20\) | 2. | \(30\) |
| 3. | \(40\) | 4. | \(10\) |
Subtopic: Grouping of Cells |
64%
Level 2: 60%+
NEET - 2013
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