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MDCAT
Physics
2021

Physics · Current Electricity

Work through this past-paper style MCQ, then read the full explanation. Practice more physics questions on mMCQ with adaptive practice and topic analytics.

Question

If a current of 5 Amperes flows through the conductor. The number of electrons per second will is

Options
  • A

    1.6 x 1019

  • B

    3.12 x 1019

  • C

    4 X 1019

  • D

    7.68 x 1020

Explanation

To calculate the number of electrons per second in a conductor, we can use the equation:

number of electrons = (current × time) / (charge of one electron)

The charge of one electron is approximately 1.6 × 10^-19 coulombs.

Assuming the time interval is 1 second,

we have: number of electrons = (5 A × 1 s) / (1.6 × 10^-19 C)

number of electrons = 3.125 × 10^19

Therefore, the number of electrons per second in the conductor is approximately 3.125 × 10^19

As per the calculation, this option is incorrect.

To calculate the number of electrons per second in a conductor, we can use the equation:

number of electrons = (current × time) / (charge of one electron)

The charge of one electron is approximately 1.6 × 10^-19 coulombs.

Assuming the time interval is 1 second,

we have: number of electrons = (5 A × 1 s) / (1.6 × 10^-19 C)

number of electrons = 3.125 × 10^19

Therefore, the number of electrons per second in the conductor is approximately 3.125 × 10^19

To calculate the number of electrons per second in a conductor, we can use the equation:

number of electrons = (current × time) / (charge of one electron)

The charge of one electron is approximately 1.6 × 10^-19 coulombs.

Assuming the time interval is 1 second,

we have: number of electrons = (5 A × 1 s) / (1.6 × 10^-19 C)

number of electrons = 3.125 × 10^19

Therefore, the number of electrons per second in the conductor is approximately 3.125 × 10^19 

To calculate the number of electrons per second in a conductor, we can use the equation:

number of electrons = (current × time) / (charge of one electron)

The charge of one electron is approximately 1.6 × 10^-19 coulombs.

Assuming the time interval is 1 second,

we have: number of electrons = (5 A × 1 s) / (1.6 × 10^-19 C)

number of electrons = 3.125 × 10^19

Therefore, the number of electrons per second in the conductor is approximately 3.125 × 10^19

To calculate the number of electrons per second in a conductor, we can use the equation:

number of electrons = (current × time) / (charge of one electron)

The charge of one electron is approximately 1.6 × 10^-19 coulombs.

Assuming the time interval is 1 second,

we have: number of electrons = (5 A × 1 s) / (1.6 × 10^-19 C)

number of electrons = 3.125 × 10^19

Therefore, the number of electrons per second in the conductor is approximately 3.125 × 10^19

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Tagged under Physics · Current Electricity · 2021