Which of the following will not show deflection from the path on passing through an electric field?

Neutrons are obtained by

Fill in the blanks given below:
$(i)$ The picture on the television screen is visible due to the presence of .......... on the screen.
$(ii)$ In the presence of electric and magnetic fields,cathode rays are known as .......... .
$(iii)$ The measurement of the $e/m_e$ ratio for electrons was performed by the scientist .......... .
$(iv)$ In a cathode ray tube,the greater the magnitude of the charge on the particles,the .......... the deflection of the particles.

The part of the atom excluding the outermost shell is known as the ...... .

The fundamental particles present in the nucleus of an atom are

The value of $e/m$ is maximum for which of the following?