Dry Cell EMF Value
The Electromotive Force (E.M.F.), represented as $E$, is the potential difference of a source of electrical energy. It signifies the energy provided per unit charge.
Standard Dry Cell Characteristics
A common dry cell battery, such as the widely used cylindrical type (e.g., AA, AAA, C, D cells), typically has a nominal E.M.F. of approximately $1.5V$.
While the actual voltage might fluctuate slightly based on the battery's chemistry, age, and load, $1.5V$ is the standard accepted value for these cells.
Selecting the Correct Option
- The question requires the approximate E.M.F. value for a dry cell.
- Standard dry cells are known to operate around $1.5V$.
- Evaluating the choices provided:
- $2.5V$ and $2.0V$ are higher than the typical E.M.F. for a single standard dry cell.
- $0.5V$ is significantly lower than the standard value.
- $1.5V$ aligns perfectly with the common E.M.F. of a dry cell.
Thus, the most accurate approximation for a dry cell's E.M.F. among the given options is $1.5V$.
Similar Questions
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Important Questions from Cells and Batteries
- To significantly increase the maximum continuous discharge current (C-rate) a lithium-ion battery pack can safely supply, while maintaining its nominal voltage, which of the following architectural design modifications is most effective?
Which of the following statement is correct for primary cell with regards to secondary cell?
Which of the following is not a primary cell?
- The dc output voltage of a lead-acid cell is:
In dry cells, free electrons are released at:
