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The charge on an electron is known to be 1.6 × 10–19 coulomb. In a circuit the current flowingis 1A. How many electrons will be flowing through the circuit in a second ?
  • a)
    1.6 × 10–19
  • b)
    1.6 × 1019
  • c)
    0.625 × 1019
  • d)
    0.625 × 1012
Correct answer is option 'C'. Can you explain this answer?
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To calculate the number of electrons flowing through a circuit in one second, we need to use the formula:

Number of electrons = Charge / Charge on an electron

Given:
Charge on an electron = 1.6 x 10^(-19) C
Current = 1 A

Now, let's calculate the number of electrons:

Number of electrons = 1C / (1.6 x 10^(-19) C)

To simplify the calculation, we can convert the charge on an electron to its reciprocal:

Number of electrons = 1C / (1.6 x 10^(-19) C) x (1 / 1)

Simplifying further:

Number of electrons = 1C / (1.6 x 10^(-19) C)

Dividing 1 by (1.6 x 10^(-19)) gives us:

Number of electrons = 6.25 x 10^18

So, the number of electrons flowing through the circuit in one second is 6.25 x 10^18.

Therefore, the correct answer is option 'C': 0.625 x 10^19.
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