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Q.

If an electron moves from rest from a point at which potential is 50 volt to another point at which potential is 70 volt, then its kinetic energy in the final state will be

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a

3.2×10−10 J

b

3.2×10−18 J

c

1 N

d

1 dyne

answer is B.

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Detailed Solution

K.E. =q0(VA−VB)=1.6×10−19(70−50)=3.2×10−18J
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