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Subject - Physics:

Basics

MCQ - 78-10545

Question:

5 × 1016 electrons pass across the section of a conductor in 1 minutes and 20 seconds. The current is flowing

  1. 0.1 mA
  2. 1 mA
  3. 10 mA
  4. 1 mA

Correct Answer: A

Explanation:

The charge of an electron is - 1.6 × 10-19 coulomb. Therefore total negative charge passes across the section of a conductor in 1 minute and 20 seconds is 5 × 1016 × 1.6 × 10-19 = 8 × 10-3. Therefore, charge passes across the section in one second, is 8 × 10-3 coulomb / 80 second = 10 -4 coulomb/second (or Amp) = 0.1 mA.

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346 MCQ for effective preparation of the test of Basics of Physics section.

Read the MCQ statement: 5 × 1016 electrons pass across the section of a conductor in 1 minutes and 20 seconds. The current is flowing , keenly and apply the method you have learn through the video lessons for Basics to give the answer. Record your answer and check its correct answer and video explanation for MCQ No. 78-10545.

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