how many electrons are present in 4c of charge ?
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Explanation: change of electron is actually negative but as question is asking about positive value I had used the positive value of charge of electron.
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Given: the charge, Q = 4 C
To Find: Number of electrons, n
Solution:
To calculate n, the formula used:
- Q = n x e
here, Q is the charge
n is the number of electrons
e is the charge on an electron i.e. = -1.6 x 10⁻¹⁹ coulombs
Applying the above formula:
Q = n x e
4 = n x 1.6 x 10⁻¹⁹
n x 1.6 x 10⁻¹⁹ = 4
n = 4 / 1.6 x 10⁻¹⁹
= 4 x 10¹⁹ / 1.6
= 4 x 10 x 10¹⁹ / 16
= 10 x 10¹⁹ / 4
= 2.5 x 10¹⁹
= 25 x 10¹⁸
n = 25 x 10¹⁸
Hence, the number of electrons present in 4C of charge is 25 x 10¹⁸ electrons.
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