41. Which of the following law/rule can he used to determine the direction of rotation of D.C. motor ?
42. Which of the following load normally needs starting torque more than the rated torque?
43. Which of the following loss in a D.C. generator is dissipated in the form of heat?
44. Which of the following loss in a D.C. generator varies significantly with the load current ?
45. Which of the following losses are significantly reduced by laminating the core of aD.C. generator ?
46. Which of the following method of speed control of D.C. machine will offer minimum efficiency ?
47. Which of the following motor has the poorest speed regulation ?
48. Which of the following motor is preferred for operation in highly explosive atmosphere ?
49. Which of the following motors is most suitable for signalling devices and many kinds of timers ?
50. Which of the following motors is usually used in house-hold refrigerators ?
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