Question:

Which of the following is secondary cell?

Updated On: Jun 23, 2023
  • Voltaic cell
  • Daniell cell
  • Leclanche cell
  • Edison cell
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The Correct Option is D

Solution and Explanation

Key Idea: In a secondary cell the electrochemical reaction is reversible. Unlike primary cell secondary cell must be charged before use. Once used the batteries can be recharged by using an external electric source that reverses the cell reaction and creates a non-equilibrium mixture of reactants. Edison cell is one such example. It has a positive plate of nickel oxide and a negative plate of iron both immersed in an electrolyte of potassium hydroxide.
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Notes on Current electricity

Concepts Used:

Current Electricity

Current electricity is defined as the flow of electrons from one section of the circuit to another.

Types of Current Electricity

There are two types of current electricity as follows:

Direct Current

The current electricity whose direction remains the same is known as direct current. Direct current is defined by the constant flow of electrons from a region of high electron density to a region of low electron density. DC is used in many household appliances and applications that involve a battery.

Alternating Current

The current electricity that is bidirectional and keeps changing the direction of the charge flow is known as alternating current. The bi-directionality is caused by a sinusoidally varying current and voltage that reverses directions, creating a periodic back-and-forth motion for the current. The electrical outlets at our homes and industries are supplied with alternating current.