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Excel in math and science
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Electricity and Magnetism
Charges and Their Interactions
Excel in math and science
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It's hard to learn from lectures and videos
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Our wiki is made for math and science
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Concept Quizzes
A nail with a mass of \( 17 \text{ g} \) is charged with \( - 2.24 \times 10^{-13} \text{ C}. \) How many excess electrons are in the nail?
The elementary charge is \(e=1.60 \times 10^{-19}\text{ C}.\)
Excel in math and science
Master concepts by solving fun, challenging problems.
It's hard to learn from lectures and videos
Learn more effectively through short, conceptual quizzes.
Our wiki is made for math and science
Master advanced concepts through explanations,
examples, and problems from the community.
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by Brilliant Staff
How many excess electrons are there on a tiny, spherical water drop of charge of \(-4.00 \times 10^{-16}\text{ C}?\)
The elementary charge is \(e=1.60 \times 10^{-19}\text{ C}.\)
Excel in math and science
Master concepts by solving fun, challenging problems.
It's hard to learn from lectures and videos
Learn more effectively through short, conceptual quizzes.
Our wiki is made for math and science
Master advanced concepts through explanations,
examples, and problems from the community.
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by Brilliant Staff
If a current of \(0.30\text{ A}\) flows for \(2.50\text{ min}\) in a conducting wire, approximately how many conduction electrons pass through the wire?
The elementary charge is \(e=1.60 \times 10^{-19}\text{ C}.\)
Excel in math and science
Master concepts by solving fun, challenging problems.
It's hard to learn from lectures and videos
Learn more effectively through short, conceptual quizzes.
Our wiki is made for math and science
Master advanced concepts through explanations,
examples, and problems from the community.
Used and loved by 4 million people
Learn from a vibrant community of students and enthusiasts,
including olympiad champions, researchers, and professionals.
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by Brilliant Staff
Suppose there is a small (copper) coin with a mass of \(25 \text{ g}.\) If we want to leave it with a charge of \(+1.4 \times 10^{-7}\text{ C},\) approximately how many electrons must be removed from that metal coin?
The elementary charge is \(e=1.60 \times 10^{-19}\text{ C}.\)
Excel in math and science
Master concepts by solving fun, challenging problems.
It's hard to learn from lectures and videos
Learn more effectively through short, conceptual quizzes.
Our wiki is made for math and science
Master advanced concepts through explanations,
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by Brilliant Staff
If an average current of \(0.07\text{ A}\) flows from a conducting sphere for \(5\text{ sec}\) and then stops, what can we know about the sphere?
The elementary charge is \(e=1.60 \times 10^{-19}\text{ C}.\)
Excel in math and science
Master concepts by solving fun, challenging problems.
It's hard to learn from lectures and videos
Learn more effectively through short, conceptual quizzes.
Our wiki is made for math and science
Master advanced concepts through explanations,
examples, and problems from the community.
Used and loved by 4 million people
Learn from a vibrant community of students and enthusiasts,
including olympiad champions, researchers, and professionals.
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by Brilliant Staff