The Figure Shows Two Plates a and B

question 73

Multiple Choice

The figure shows two plates A and B. Plate A has a potential of 0 V and plate B a potential of 100 V. The dotted lines represent equipotential lines of 25, 50, and 75 V. A positive test charge of 1.6 × 10^-19 C at point x is transferred to point z. The energy gained or expended by the test charge is

• A) 8 × 10^-18 J, gained.
• B) 8 × 10^-18 J, expended.
• C) 24 × 10^-18 J, gained.
• D) 24 × 10^-8 J, expended.
• E) 40 × 10^-8 J, gained.

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