Physics Test Worksheets With Answer, 2013 Page 4
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1125. In adiabatic process, the work done by system is 50 3, then
(a) the temperature of the system will be increase 50)
(b) the temperature of the system will be constant
(c) the tnternal energy of the system will be increase SOJ
(d) the internal energy of the system will be decrease 50 J
Ans.(d)
28. The requirement in phase relative source that those
(a) amplitudes are same
(b) wavelengths are same
(c) frequencies are same
(d) first phase difference are same
Ans.(d)
29. In the Young’s double slit experiment, intensities of black and bright fringes are 1 and
4 respectively, the ratio of amplitudes of sources will be
(a)1:1
(b)1:2
(c)3:1
(d)1:4
Ans.(b)
30. The primary reason of generation of Frounhofer line is
(a) reflection of radiations by chromosphere
(b) absorption of radiation by chromosphere
(c) emittion of radiation by chromosphere
(d) transmission of radiation by chromospheres
Ans.(b)
32. A pure resistance is attached as shown in figure. The phase difference between the emf
and flowing current will be
(a) zero
(b) r/2
(c —r/2
(d) n/4
Ans.(a)
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