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Examoogle • User • info@examoogle.com • EE-2024-8821
Chapter 1 of 12 • Page 1 of 248🔒 Protected PDF • Watermarked
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One coulomb of charge is equivalent to the charge of approximately:
6.25×1018 electrons
1.6×10−19 electrons
9.1×10−31 electrons
1.6×1019 electrons
6.25×1018 electrons
One Coulomb (1 C) is defined as the amount of electric charge transported by a constant current of one ampere in one second. Since the elementary charge of a single electron is approximately 1.602×10−19 C, one Coulomb contains approximately 6.25×1018 electrons.
One Coulomb (1 C) is defined as the amount of electric charge transported by a constant current of one ampere in one second. Since the elementary charge of a single electron is approximately 1.602×10−19 C, one Coulomb contains approximately 6.25×1018 electrons.
Think of a Coulomb as a 'package' of charge. If one electron is a single grain of sand, one Coulomb is a massive, specific collection of 6.25 quintillion grains.
Q=ne — where Q is total charge, n is the number of electrons, and e is elementary charge
e≈1.6×10−19 C — charge of a single electron
This is based on the principle of quantization of charge, which states that any electric charge Q is an integer multiple of the elementary charge e of an electron. The relationship is expressed as Q=n×e, where n is the number of particles. To find n for 1 Coulomb, we rearrange to n=eQ=1.602×10−191.
Charge is quantized, meaning it exists in discrete packets rather than a continuous flow.
The SI unit of electric charge is the Coulomb (C).
One electron possesses a negative charge of 1.602×10−19 C.
Provides a standardized SI unit for quantifying electrical energy and current flow.
The number is extremely large, making it impractical for everyday human-scale calculations without scientific notation.
Calculating current flow in electronic circuits.
Determining the strength of electrostatic forces between charged particles.
Elementary charge e is a fundamental physical constant.
Option B represents the charge of a single electron, not one Coulomb.
Option C is the mass of an electron in kilograms, not the charge count.
A is correct — One Coulomb of charge is equivalent to the aggregate charge of approximately 6.25×1018 electrons.
Always remember the relation n=e1. If you forget the power, recall that charge is very small (10−19), so you need a massive number of them to make a whole unit (1 C).