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There are n rows having a cell in each row the EMF and internal resistance of the cell are five volt and 2 oh if the combination has 20 v an internal resistance 1 find the number of cell?
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There are n rows having a cell in each row the EMF and internal resist...
Solution:

Given:
- EMF of each cell = 5 V
- Internal resistance of each cell = 2 ohms
- Total EMF of the combination = 20 V
- Total internal resistance of the combination = 1 ohm

Let the number of cells be n.

Using the formula for combination of cells in series:
- Total EMF = EMF of one cell * n
- Total internal resistance = Internal resistance of one cell * n

Calculating the number of cells:
- 20 = 5 * n
- n = 20 / 5
- n = 4
Therefore, the number of cells in the combination is 4.

Explanation:
When cells are connected in series, the EMF of the cells get added up while the internal resistances also add up.
In this case, the total EMF of the combination is 20 V and the total internal resistance is 1 ohm.
By using the formula for series combination of cells, we can calculate the number of cells in the combination, which turns out to be 4.
Hence, there are 4 cells in the combination to get a total EMF of 20 V and a total internal resistance of 1 ohm.
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There are n rows having a cell in each row the EMF and internal resistance of the cell are five volt and 2 oh if the combination has 20 v an internal resistance 1 find the number of cell?
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There are n rows having a cell in each row the EMF and internal resistance of the cell are five volt and 2 oh if the combination has 20 v an internal resistance 1 find the number of cell? for UPSC 2024 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about There are n rows having a cell in each row the EMF and internal resistance of the cell are five volt and 2 oh if the combination has 20 v an internal resistance 1 find the number of cell? covers all topics & solutions for UPSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for There are n rows having a cell in each row the EMF and internal resistance of the cell are five volt and 2 oh if the combination has 20 v an internal resistance 1 find the number of cell?.
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