How many electrons are needed to produce a charge of -3.2 μC? (e = 1.60×10^-19 C)

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $25.99Unlock all

Study for the UCF PHY2054 General Physics Exam. Use flashcards and multiple-choice questions complete with hints and explanations. Boost your understanding and get exam-ready!

Multiple Choice

How many electrons are needed to produce a charge of -3.2 μC? (e = 1.60×10^-19 C)

Explanation:
Each electron carries a charge of -1.60×10^-19 C. The total charge is the number of electrons times this charge, so the number of electrons is N = |Q| / e. Convert the given charge: -3.2 μC = -3.2×10^-6 C, so |Q| = 3.2×10^-6 C. N = (3.2×10^-6 C) / (1.60×10^-19 C) = (3.2/1.60) × 10^( -6 + 19 ) = 2.0 × 10^13. The negative sign just indicates the charge comes from electrons; the count is positive. So about 2.0×10^13 electrons are needed.

Each electron carries a charge of -1.60×10^-19 C. The total charge is the number of electrons times this charge, so the number of electrons is N = |Q| / e.

Convert the given charge: -3.2 μC = -3.2×10^-6 C, so |Q| = 3.2×10^-6 C.

N = (3.2×10^-6 C) / (1.60×10^-19 C) = (3.2/1.60) × 10^( -6 + 19 ) = 2.0 × 10^13.

The negative sign just indicates the charge comes from electrons; the count is positive. So about 2.0×10^13 electrons are needed.

More Multiple Choice Questions
Subscribe

Get the latest from Passetra

You can unsubscribe at any time. Read our privacy policy