An electron was accelerated from rest through a potential difference of 990 V . What is its speed? (Use the mass of an electron =9.11×10−31 kg =9.11 imes 10^{-31} \mathrm{~kg} . the mass of proton =1.67×10−27 kg =1.67 imes 10^{-27} \mathrm{~kg} and the charge of an electron =1.6×10−19C =1.6 imes 10^{-19} \mathrm{C} ).

Question

An electron was accelerated from rest through a potential difference of 990 V . What is its speed? (Use the mass of an electron =9.11×10−31 kg =9.11 	imes 10^{-31} \mathrm{~kg} . the mass of proton =1.67×10−27 kg =1.67 	imes 10^{-27} \mathrm{~kg} and the charge of an electron =1.6×10−19C =1.6 	imes 10^{-19} \mathrm{C} ).

Accepted Answer

ঘ. 1.86×107 ms−1 1.86 	imes 10^{7} \mathrm{~ms}^{-1}

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