78. In a dc machine
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79. Function of the interpoles in the dc generators is to
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80. Which of the following is not a cross field machine?
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81. A d.c. shunt generator has full-load voltage regulation of 10% at rated speed of 1000 r.p.m. If it is now driven at 1250 r.p.m., then its voltage regulation at full load would
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82. Load saturation characteristic of a dc generator gives relation between
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83. In d.c. machines, constant loss is composed of
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84. An amplidyne develops an output voltage of 100 volts at an armature speed of n r.p.m. If its armature is now driven at 2n r.p.m., then its output voltage is
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