Modern Physics MCQ for NEET - 2

Question: 6

Which atom model accounts for the stability of the atom and the emission of sharp spectral lines?

(A) Sommerfeld’s atom model

(B) Bohr’s atom model

(C) Rutherford’s atom model

(D) Thomson’s atom model

Question: 7

Gases can be made to conduct electricity

(A) by applying a large potential difference across a gas column at very large pressure

(B) by the above two methods

(C) by allowing X-rays to pass through the gases

(D) by applying a large potential difference across a gas column at very low pressure

Question: 8

When the orbit of the electron is elliptical, effective mass of the electron will be

(A) infinity

(B) zero

(C) a constant

(D) different at different parts of its orbit

Question: 9

Canal rays

(A) affect the photographic plate

(B) are deflected by electric and magnetic fields

(C) can produce fluorescence

(D) all the above

Question: 10

In Xenon flash tube, each lasts several

(A) nano seconds

(B) milli seconds

(C) pico seconds

(D) micro seconds