81. The scale of a rectifier instrument is
82. Which of the following in an application of D.C. motors?
83. Most sensitive galvanometer is
84. Direct water cooling of rotor winding presents
85. According to application, instruments are classified as
86. Tractive magnets are operated from
87. If an instrument has cramped scale for larger values, then it follows
88. The resistivity of water should not be less than
89. In a D.C. machine the current per brush arm should not be more than
90. The power factor of a single phase load can be calculated if the instruments available are
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