A torch needs 4.5 V to work. Each dry cell gives 1.5 V. How many cells must be joined together (positive terminal of one to negative terminal of the next) to run the torch?

Question

NumericalElectric Cell and Battery as Source of Current

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In the circuit symbol of an electric cell, what does the longer, thinner line stand for?

Four circuit symbols are shown, labelled P, Q, R and S. Which one represents a battery?

Symbols Used in Circuit Diagrams

Electric Cell and Battery as Source of Current

What is the difference between an electric cell and a battery? How are the cells joined to make a battery?