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Chapter 26: Problem 8

Which of the following has the same unit as the electromotive force (emf)? a) current b) electric potential c) electric field d) electric power e) none of the above

Short Answer

Expert verified
a) current b) electric potential c) electric field d) electric power Answer: b) electric potential

Step by step solution

01

1. Recall the units of the given quantities

To identify which of the choices has the same unit as emf, we need to first recall and write down the units for each of the given quantities: - Current (I) is measured in Amperes (A). - Electric potential (V) is measured in Volts (V). - Electric field (E) is measured in Volts per meter (V/m). - Electric power (P) is measured in Watts (W).
02

2. Write down the units of electromotive force (emf)

Electromotive force (emf) is a measure of the electrical energy that is generated by a device, and its units are Volts (V).
03

3. Compare the units of emf with the given quantities

Now that we've recalled the units of each given quantity, we can compare them to the units of emf. Electromotive force has units of Volts (V). - Current: Amperes (A) - not the same units as emf - Electric potential: Volts (V) - the same units as emf - Electric field: Volts per meter (V/m) - not the same units as emf - Electric power: Watts (W) - not the same units as emf
04

4. Choose the option with the same units as emf

We've found that electric potential has the same units as electromotive force (emf). Therefore, the correct answer is: b) electric potential

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Most popular questions from this chapter

Two capacitors in series are charged through a resistor. Identical capacitors are instead connected in parallel and charged through the same resistor. How do the times required to fully charge the two sets of capacitors compare?

You wish to measure both the current through and the potential difference across some component of a circuit. It is not possible to do this simultaneously and accurately with ordinary voltmeters and ammeters. Explain why not.

A capacitor bank is designed to discharge 5.0 J of energy through a \(10.0-\mathrm{k} \Omega\) resistor array in under \(2.0 \mathrm{~ms}\) To what potential difference must the bank be charged, and what must the capacitance of the bank be?

A battery, a resistor, and a capacitor are connected in series in an RC circuit. What happens to the current through a resistor after a long time? Explain using Kirchhoff's rules.

An ammeter with an internal resistance of \(53 \Omega\) measures a current of \(5.25 \mathrm{~mA}\) in a circuit containing a battery and a total resistance of \(1130 \Omega\). The insertion of the ammeter alters the resistance of the circuit, and thus the measurement does not give the actual value of the current in the circuit without the ammeter. Determine the actual value of the current.
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