Test: Electric Cells - JAMB MCQ

A simple voltaic cell converts chemical energy into electrical energy through a redox reaction.

A salt bridge in a voltaic cell allows the migration of ions, maintaining charge balance and completing the circuit.

When the electrodes of a voltaic cell are made of the same metal, electrode polarization occurs, leading to a decrease in cell efficiency.

Increasing the concentration of the electrolyte can help correct the defect of electrode polarization in a voltaic cell.

The Daniel cell is a primary cell, whereas the other options are types of Leclanché cells, which are primary or secondary cells.

The electrolyte used in a Daniel cell is a mixture of zinc sulfate and copper sulfate.

Dry Leclanché cells, also known as dry cells, are commonly used in flashlights and other portable devices.

Manganese dioxide is the active ingredient in the positive electrode (cathode) of a Leclanché cell.

Lead-acid accumulators, also known as lead-acid batteries, are commonly used as backup power supplies in telecommunication systems.

Lithium-Iron cells, also known as lithium-iron phosphate (LiFePO₄) batteries, have a higher energy density compared to lead-acid and nickel-iron cells.