Electricity and Magnetism — Important Questions
ICSE · Class 7 · Physics
99 important questions from Electricity and Magnetism for ICSE Class 7 Physics, with answers. Includes multiple choice and multiple correct questions.
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Important Questions from Electricity and Magnetism
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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