NAT I Engineering Physics With Answers

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NAT I Engineering Physics

Sr. # Questions Answers Choice
1 To explain his theory Bohr used Conservation of linear momentum Conservation of angular momentum Conservation of quantum frequency Conservation of energy
2 The nuclear model of atom was proposed by J.J Thomson E.Rutherford Neil Bohr Summerfield
3 Who explained the origin of the Fraunhofer lines? Fraunhoffer Kirchhoff Fresnel Snell
4 Band spectrum in produced by H He H<sub>2</sub> Na
5 In which of the following states does the incandescent substance give continuous spectrum? Vapours in atomic state Vapours in molecular state Solid or fluid in bulk state Solid or fluid in plasma state
6 Which of the following sources give discrete emission spectrum? Incandescent electric bulb Sun Mercury vapour lamp Candle
7 There are discrete energy levels in atoms. It was first experimentally demonstrated by Rutherford's experiment Frank Hertz experiment Marsden's experiment Sommerfield experiment
8 The minimum wavelength of the X-rays produced by electrons accelerated through a potential difference of V volts is directly proportional to √V V<sup>2</sup> 1/√V 1/V
9 The essential distinction between X-rays and y-rays is that y-rays have smaller wavelength than X-rays y-rays emanate from nucleus while X-rays emanate from outer part of the atom y-rays have greater ionizing power than X-rays y-rays are more penetrating than X-rays
10 A photoelectric cell converts Electrical energy to light energy Light energy to light energy Light energy to electrical energy Light energy to elastic energy
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