Q45 of 54 Page 135

An electron is moving with the velocity of 1.2 x 106m/s. If the mass of an electron is 9.1 x 10 -31 kg, then find its kinetic energy.

velocity of electron = 1.2 × 106 m/s


mass of electron = 9.1 × 10-31 Kg


Kinetic energy is given by,






Hence, the kinetic energy of the electron is


More from this chapter

All 54 →
43

Explain different types of energy dissipation in energy transformation. How can these dissipation reduced ?

 44

Prove that the mechanical energy of a freely falling object in the gravitational field remains constant at every point.

 46

A machine lifts an object of 40 kg mass up to the height of 10 m, then calculate the work done. (g = 9.8 m/s2).

 47

An object of mass 6 kg falls from the height of 5 m. Calculate the change in potential energy of the object .