51. The property of a conductor due to which it passes current is called
52. The substances which have a large number of free electrons and offer a low resistance are called
53. The ratio of mass of proton to that of electron is nearly
54. Three resistances of 10 ohms, 15 ohms and 30 ohms are connected in parallel.
The total resistance of the combination is
The total resistance of the combination is
55. Switching of a lamp in house produces noise in the radio. This is because switching operation produces
56. Which of the following statement is true?
57. The four bulbs of 40 W each are connected in series swift a battery across them, which of the following statement is true?
58. A glass rod when rubbed with silk cloth is charged because
59. Insulating materials have the function of
60. When electric current passes through a bucket full of water, lot of bubbling is observed. This suggests that the type of supply is
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