An electron acquires 5.25 x 10 to the power of negative 16 end exponent J of kinetic energy when it is accelerated by an electric field from plate A to plate B. What is the potential difference between the plates, and which plate is at the higher potential?
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k/c 5.25×10^-5/2.5×10^-4
=2.1×10^-2
Alpha=2.11×10^-2/4.04×102
=0.519
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