2nd PUC Physics Series-7 December 3, 2020December 23, 2020wefru PUC Science 2nd Year Physics Series-7 quiz 1 Created on December 02, 2020 By wefru 2nd PUC Physics Series 7 TEST YOUR KNOWLEDGE OF SCIENCE 1 / 10 Q.61 The electric potential of earth is taken as: zero infinity unity None of these 2 / 10 62. The speed at which tjie current travels in a conductor is nearly: 3 × 104 ms-1 7 × 104 ms-1 8 × 104 ms-1 9 × 104 ms-1 3 / 10 63. The resistance of a human body is about: 12 Ω 120 Ω 12 KΩ 120 MΩ 4 / 10 64. The number of electrons that constitute 1 A of current is: 6.25 × 1018 6.25 6.25 × 25 012 5 / 10 65. How many different resistances are possible with two equal resistors? 3 4 5 6 6 / 10 66. Given three equal resistors, how many different combinations (taken all of them together) can be made? 4 2 1 45 7 / 10 67. Specific resistance of ali metals is mostly affected by: temperature pressure magnetic field volume 8 / 10 68. The example of a non-ohmic resistance is: copper wire fi lament lamp carbon resistor diode 9 / 10 69. If a certain piece of copper is to be shaped into a conductor of minimum resistance, its length (L) and cross-sectional area (a) shall respectively be : L, 2A L2, 2A 2L, 2A 2l, A2 10 / 10 70. The specific resistance of a rod of copper as compared to that of thin wire of copper is : less more same depends upon the length and area of cross-section of the wire Your score isThe average score is 30% LinkedIn Facebook Twitter VKontakte 0% Restart quiz