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Edexcel | Physics WPH0 | W 19 4 1 | 1 hour 30 minutes
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Two parallel conducting plates are separated by a distance d. A potential difference V is applied between the plates and a charge Q is placed halfway between them, as shown.

                     

Which of the following gives the magnitude of the force acting on the charge?

The only correct answer is D because E = V/d and F = EQ

A is not correct because this includes (× d) instead of (÷ d)

B is not correct because this is half the correct value, incorrectly using d/2 because

Q is hallway between the plates

C is not correct because this has reversed Q and d

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