An electron is moving through a magnetic field. if the velocity of the electron is doubled, the magnetic force experienced by the electron will
a. stay the same
b. double
c. triple
d. quadruple

B. Double

Explanation:

As we know that the magnetic force on moving electron is given as

now we will have

here we know that the velocity of the electron is doubled and rest all components remains the same

so we will have

so the new force will be double that of initial force on the electron so correct answer will be

B. Double

  the unit of the measure =

explanation:

  the property that is quantified by the energy needed per of material to raise the temperature by one.

  si unit of energy = joule (j)

  si unit of temperature = kelvin (k)

  si unit of mass of material = kilogram (kg)

the property that is quantified by the energy needed per of material to raise the temperature by one is called specific heat.

the unit of specific heat is