E-PolyLearning

41. Voltage which is applied in discharge tube is dependent upon
a. length of tube
b. width of tube
c. tube nature
d. wideness
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Answer: (a).length of tube

42. Measurement of e/m was possible because of instrument made by
a. JJ Thomson
b. J Perrin
c. Edison
d. Bohr
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Answer: (a).JJ Thomson

43. Accelerated electrons like waves performed
a. diffraction
b. movement
c. absorbed potential energy
d. all of these
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Answer: (a).diffraction

44. Planck proposed that energy travels in
a. discontinuous manner
b. continuous manner
c. slow manner
d. general manner
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Answer: (a).discontinuous manner

45. Magnetic properties of cathode rays were discovered in year
a. 1897
b. 1895
c. 1893
d. 1890
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Answer: (a).1897