Question

Which of the following statements is/are correct of a source of emf (such as a primary cell) ?

• A. Inside the cell there always exist an electrostatic field and a non-electrostatic field off equal magnitude direction opposite to it.
• B. Potential difference is the work an electrostatic field whereas electromotive force is the work of a non-electrostatic field.
• C. Under certain condition current can flow from positive terminal to negative terminal within the cell.
• D. When an external resistance is connected to the cell, the electrostatic field inside the cell decreases in magnitude compared to the non- electrostatic field.

Answer 1

Answer: (B), (C), (D)

The correct options are
B Potential difference is the work an electrostatic field whereas electromotive force is the work of a non-electrostatic field.
C Under certain condition current can flow from positive terminal to negative terminal within the cell.
D When an external resistance is connected to the cell, the electrostatic field inside the cell decreases in magnitude compared to the non- electrostatic field.