A 12-cell lead-acid battery has an open-circuit voltage of 2.1 V per cell. What is the total open-circuit voltage?

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Enhance your understanding of the fundamentals of electricity with the AMT General Exam. Study with multiple-choice questions crafted to improve your knowledge and confidence. Prepare effectively for your success!

Multiple Choice

A 12-cell lead-acid battery has an open-circuit voltage of 2.1 V per cell. What is the total open-circuit voltage?

Explanation:
Voltages add when cells are connected in series, and open-circuit means no current is flowing, so you measure the total EMF of the stack. A lead-acid cell is about 2.1 volts when fully charged. With twelve cells in series, the voltages sum: 12 × 2.1 V = 25.2 V. So the total open-circuit voltage is 25.2 volts.

Voltages add when cells are connected in series, and open-circuit means no current is flowing, so you measure the total EMF of the stack. A lead-acid cell is about 2.1 volts when fully charged. With twelve cells in series, the voltages sum: 12 × 2.1 V = 25.2 V. So the total open-circuit voltage is 25.2 volts.

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