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Chapter 25: Problem 3

Can the voltage across a battery's terminals differ from the battery's rated voltage? Explain.

Short Answer

Expert verified
Yes, the voltage across a battery's terminals can differ from the battery's rated voltage due to factors such as its state of charge and whether it is idle or under load.

Step by step solution

01

Understand Battery Rated Voltage

The rated voltage of a battery is the maximum voltage that a battery can deliver. This is specified by the manufacturer at the point of manufacture. This voltage level is obtained when the battery is fully charged.
02

Understanding Terminal Voltage

The terminal voltage of a battery is the voltage that can be measured across the battery's terminals at any given time. It is dependent on the battery's state of charge, the internal resistance, and whether the battery is idle or under load at the time of measurement.
03

Evaluate Difference

From these definitions, it can be understood that the terminal voltage can indeed differ from the battery's rated voltage. For example, when a battery is discharged, the terminal voltage drops lower than the rated voltage. Similarly, during charging, particularly at the end of the charging cycle, the terminal voltage might temporarily rise above the rated voltage.

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Most popular questions from this chapter

A defective starter motor draws 300 A from a car's \(12-V\) battery, dropping the battery terminal voltage to \(6 \mathrm{V}\). A good starter should draw only 100 A. What will the battery terminal voltage be with a good starter?

The voltage across a charging capacitor in an \(R C\) circuit rises to \(1-1 / e\) of the battery voltage in \(5.0 \mathrm{ms}\). (a) How long will it take to reach \(1-1 / e^{3}\) of the battery voltage? (b) If the capacitor is charging through a \(22-\mathrm{k} \Omega\) resistor, what's the capacitance?

Work all circuit problems to two significant figures even if component values are given with one significant figure.What's the emf of a battery that delivers 27 J of energy as it moves \(3.0 \mathrm{C}\) between its terminals?

Work all circuit problems to two significant figures even if component values are given with one significant figure.Resistors \(R_{1}\) and \(R_{2}\) are in series, and the series combination is in parallel with \(R_{3} .\) This parallel combination is connected across a battery. Draw a diagram of this circuit.

When a large electric load such as a washing machine or oven comes on, lights throughout a house often dim. Why?
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