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Q1) the first model of atom in 1898 was proposed by ?
Q2) in Geiger Marsden scattering experiment the trajectory traced by an a- particle depends on
Q3) the first spectral series was discovered by
Q4) light energy emitted by star is due to ?

Q5) in nuclear reactors the control rods are made of ?
Q6) Chathode rays were discovered by ?
Q7) the phenomenon of photoelectric emission was discovered in 1887 by ?
Q8) the maximum value of photoelectric current is called ?
Q9) which phenomenon best support the theory that matter has a wave nature?
Q10) Region without free electrons and holes in a p - n junction is ?

Q11) potential barrier developed in a Juction diode oppose the flow of ?
Q12) At absolute zero Si acts as a ?