Questions and Answers
Which of the following SI units is the unit of electric potential difference?
What was the change in electric potential difference if a point charge of +1.0 µC is moved in an electric field with a change in electric potential energy of 10.0 J?
-1.0 × 10^7 V
What is the strength of the electric field between parallel plates that are 2.0 cm apart and read 200.0 V on a voltmeter?
1.0 × 10^4 N/C
How much work was done if a +1.0 µC point charge is moved in an electric field to produce a +200.0 V change in potential?
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What is the magnitude of the charge if 4.0 × 10^-18 J of work done changes its electric potential difference by 25.0 V?
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Study Notes
Electric Potential Difference
- The SI unit of electric potential difference is the volt (V).
Change in Electric Potential Energy
- A point charge of +1.0 µC moved in an electric field experiences a change in electric potential energy of 10.0 J.
- This results in a change in electric potential difference of -1.0 × 10^7 V.
Electric Field Strength
- A voltmeter measures a potential difference of 200.0 V between two parallel plates that are 2.0 cm apart.
- The strength of the electric field between the plates is calculated to be 1.0 × 10^4 N/C.
Work Done on a Charge
- When a +1.0 µC point charge is moved to create a +200.0 V change in potential, the work done is 2.0 × 10^-4 J.
Magnitude of Charge
- If 4.0 × 10^-18 J of work changes the electric potential difference by 25.0 V, the magnitude of the charge involved is 1.6 × 10^-19 C.
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Description
Test your knowledge on electrical potential difference with this quiz. It covers key concepts such as the unit of electric potential difference and calculations involving electric charges. Perfect for physics students looking to reinforce their understanding.
