61. ML2T-2 is the dimensional formula for
62. Solar eclipse will take place when
63. Isotopes of an element contain
64. One watt-hour is equivalent to
65. Sir C.V. Raman was awarded Nobel Prize for his work connected with which of the following phenomenon of radiation?
66. In which of the following industries is mica as a raw material?
67. Radiocarbon dating technique is used to estimate the age of
68. Identify the vector quantity from the following
69. Large astronomical telescopes always use as objective
70. One should not connect a number of electrical appliances to the same power socket because
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