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Use this graphic to answer the question.

An automotive mechanic charges an engine battery. How long would it take to charge a battery with a constant current and a battery terminal of 14 volts?

Based on the provided chart and question, the charging process involves a constant current and a battery terminal voltage of 14 volts.

The chart shows the different stages of the battery charging process. The "Bulk" charging stage represents the constant current phase, where the current is held at 10 amps, and the voltage gradually increases until it reaches around 14 volts. After reaching 14 volts, the battery enters the "Absorption & Equalization" stage, where the voltage is kept constant while the current decreases.

From the graph, it appears that at the 14-volt mark, the charging time is approximately **2.5 to 3 hours**. This represents the transition from the "Bulk" phase (constant current) to the next stage.

### Summary:
The battery would take about **2.5 to 3 hours** to charge to 14 volts with a constant current of 10 amps.

Would you like more detailed insights or have any questions? Here are 5 related questions:

1. What is the difference between the bulk and absorption stages in battery charging?
2. How does the charging current decrease in the constant voltage phase?
3. What is the significance of voltage per cell (vpc) in battery charging?
4. How does the "float" charging stage maintain battery health?
5. Why is constant current charging used in the initial phase of battery charging?

**Tip**: Always monitor both the voltage and current during battery charging to prevent overcharging and extend battery life.

An automotive mechanic charges an engine battery. How long would it take to charge a battery with a constant current and a battery terminal of 14 volts?

This page explains how to determine the charging time for a 12V automotive battery when the terminal voltage reaches 14 volts. The solution explores the constant current phase (Bulk stage) and the time taken based on a charging algorithm. Suitable for high school students in Grades 9-12.

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