Question

An electron (charge = $1.6\times {10}^{-19}$ coulomb) is accelerated through a potential of 1,00,000 volts. The energy required by the electron is

• A. $1.6\times {10}^{-24}$ joule
• B. $1.6\times {10}^{-14}$ joule
• C. $0.53\times {10}^{-14}$ joule
• D. $1.6\times {10}^{-14}$ joule

Answer 1

The correct option is D $1.6\times {10}^{-14}$ joule

Energy = qV= $1.6\times {10}^{-19}\times 100000=1.6\times {10}^{-14}J$