A beam of white light is passed through a diffraction grating and the resulting spectrum is allowed to fall on a screen. Which one of the following is the color of light that undergoes the greatest deviation from its original direction. Is it:

Q-; A beam of white light is passed through a diffraction grating and the resulting spectrum is allowed to fall on a screen. Which one of the following is the color of light that undergoes the greatest deviation from its original direction. Is it:

1) red
2) yellow
3) blue
4) violet
ANSWER: 1 -- RED

Q-2; Which of the following are the parts of a DC generator that convert the AC in the armature to DC in the external circuit. Are these parts the:

1) field poles
2) slip rings and the brushes
3) commutator and the brushes
4) armature and the core
ANSWER: 3 -- COMMUTATOR AND THE BRUSHES

Q-3; : A P-type semiconductor is doped to produce one of the following. Will it produce:

1) both holes and electrons
2) positive electrons
3) negative electrons
4) holes
ANSWER: 4 -- HOLES

Q-4; When an atomic nucleus emits a beta particle, one of its neutrons disintegrates into one of the following set of particles. Does it disintegrate into:

1) a positron and an electron
2) a proton, an electron, and an antineutrino
3) a proton, an electron, and a positron
4) a neutrino and an antineutrino
ANSWER: 2 -- A PROTON, AN ELECTRON AND AN ANTINEUTRINO