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When a proton moves opposite to electric field, work done on it by electric field is ..... . and electrostatic potential energy of proton ......,

Answer»

NEGATIVE, INCREASES
negative, decreases
positive, increases
positive, decreases

SOLUTION :Work done by electric fieldW = `vecF.VECD`
`:. W lt 0 (because "Here" vecF ` and `vecd` are in opposite directions )
Here potential energy of proton will increase.
`( because ` its kinetic energy decreases )


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