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
Two ampere hour (Ah) is equal to how many Coulombs?
In ideal case, the charging current for 200 Ah battery would be-
- 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 is an example of a primary battery?
Which of the following statement is correct for primary cell with regards to secondary cell?
