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51. A glass rod is rubbed with silk, is found positively charged. This is because (NTSE Delhi, Stage-I, 2016-17)

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52. An electric bulb marked 40 W - 220 V is connected with an electric supply of 110 V. Its electric power is (NTSE Delhi, Stage-I, 2016-17)

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53. Two lamps 'A' rated 100 watt 220 V and 'B' rated 60 watt 220 V are connected in series to electric main supply of 220 V. The ratio of heat produced in lamp 'A' to the lamp 'B' would be (NTSE Delhi, Stage-I, 2015-16)

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54. The resistance of a conductor depends (NTSE Delhi, Stage-I, 2015-16)

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55. An ammeter has 10 divisions between mark 0 and mark 2 on its scale. Which of the following reading the ammeter cannot read? (NTSE Delhi, Stage-I, 2015-16)

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