Two points P and Q are maintained at the potentials of 10 V and -4 V respectively. The work done in moving 100 electrons from P to Q is: - Physics MCQ AIEEE 2009 2026 | ExamTest.live

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Two points P and Q are maintained at the potentials of 10 V and - 4 V respectively. The work done in moving 100 electrons from P to Q is:

Solution & Step-by-step Explanation

Work done W = q (V_{f ina l} - V_{ini t ia l}) .Charge q = 100 \times (- e) = - 100 \times 1.6 \times 1 0^{- 19} C .Initial potential V_{P} = 10 V, Final potential V_{Q} = - 4 V . W = (- 100 \times 1.6 \times 1 0^{- 19}) \times (- 4 - 10) W = (- 1.6 \times 1 0^{- 17}) \times (- 14) W = + 22.4 \times 1 0^{- 17} = 2.24 \times 1 0^{- 16} J

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Two points P and Q are maintained at the potentials of 10 V and - 4 V respectively. The work done in moving 100 electrons from P to Q is:

- 1.9 \times 1 0^{- 17} J

9.60 \times 1 0^{- 17} J

- 2.24 \times 1 0^{- 16} J

2.24 \times 1 0^{- 16} J

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