Electricity and Magnetism
ICSE · Class 7 · Physics
Practice quiz for Electricity and Magnetism — ICSE Class 7 Physics. MCQs and questions with answers to test your preparation.
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Quick Quiz: Electricity and Magnetism
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A torch uses 2 dry cells in series. If each cell is 1.5 V, what is the total voltage of the battery?
A battery has 3 cells of 1.5 V each connected in series. What is the total voltage supplied by the battery?
Two cells of 1.5 V each are joined in series, and a bulb is connected in the circuit. What total voltage acts across the bulb?
A torch has 4 cells, each of 1.5 V, connected in series. What is the total voltage of the torch battery?
Sample Questions
A dry cell has 1.5 V. How many such cells in series are needed to make a 6.0 V battery?
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4 cells
Number of cells = total voltage ÷ voltage of one cell = 6.0 ÷ 1.5 = 4.
A cell produces 1.5 V. If a battery of 5 such cells is made in series, what is the total voltage?
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7.5 V
In series, voltages add. So 5 × 1.5 V = 7.5 V.
Three cells of 1.2 V each are connected in series. What is the voltage of the battery?
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3.6 V
Series voltages add: 1.2 V + 1.2 V + 1.2 V = 3.6 V.
A torch battery has 2 cells in series, each of 1.5 V. What is the total voltage, and what is the correct reasoning?
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3.0 V because series voltages add
Two cells in series give 1.5 V + 1.5 V = 3.0 V. In a series combination, the voltages add.
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