Question

What is the EMF of a dry cell?

Answer 1

In the question, we are asked to give the EMF of a dry cell. As a very first step, one could define what a dry cell is and also mention the common dry cell. Then you could also explain what emf is. Now, you could connect the two facts and thus recall the value of the emf of a dry cell.

Complete step-by-step solution:
In the question, we are asked what the EMF of a dry cell is. As a very first step, one could understand what exactly a dry cell is.
We could define a dry cell as a type of electric battery that could be used as portable electrical devices. Basically, a paste electrolyte is used in a dry cell that contain enough moisture for the current flow.
We know that emf or the electromotive force could be defined as the electric potential that is produced either by changing magnetic field or by electrochemical cell.
Zinc-carbon cell, which is otherwise called dry Leclanche cell, is a very common dry cell. It is known to have an emf of 1.54V.

Additional information:
When compared to a wet cell, a dry cell has a good point that they can operate at any orientation without any spilling. This is due to the absence of free liquid and thereby making it suitable for equipment that can be portable.

Note: What a standard dry cell comprises is zinc anode that is basically in the form of a cylindrical pot that has a carbon cathode that is in the form of a central rod. Ammonium chloride as an electrolyte is found next to the zinc anode as an electrolyte. However, wet cells have high drain applications.