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Electrical Technology, Volume 1 by S. P. Bali

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7

Electrochemical Action

OBJECTIVES

In this chapter you will learn about:

  • The purpose and construction of a simple cell
  • Polarization and local action
  • To define the terms E and internal resistance r of cell
  • To perform calculations using V = E – Ir
  • To determine the total e.m.f. and total internal resistance of cells connected in series and in parallel
  • To distinguish between primary and secondary cells
  • To explain the construction and practical applications of the Leclanche, lead-acid, nickel-cadmium mercury and silver-oxide cells
  • List the advantages and disadvantages of alkaline cells over lead-acid cells
  • Understand the term cell-capacity
  • Charging of cells (constant current and constant voltage)
  • Constructional details of secondary cells

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