10th Class Physical Science Chapter wise Important bit bank in English

46. The resistance of a conductor depends on the ________ of the conductor.

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material

47. In the equation R = ρ \frac { 1 }{ A }. Here ‘ρ’ is called _________ or _____________.

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specific resistance, resistivity

48. The SI unit of resistivity is _______.

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Ω – m

49. The unit of resistance is _________.

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Ohm (Ω)

50. The reciprocal of resistivity is called _________.

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conductivity (σ)

51. Metals with low resistivity behave as ___________.

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good conductors

52. A closed path created by the connecting wires through a battery along which electrons can flow is called a ____________.

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electric circuit

53. The resistors are connected in series combination the resultant resistance is _________ to sum of individual resistances. (R=R1+R2+R3).

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equeal

54. The resistors are connected in parallel combination the resultant resistance is equeal to _________ of individual resistances.(R = \frac { 1 }{ { R }_{ 1 } } +\frac { 1 }{ { R }_{ 2 } } +\frac { 1 }{ { R }_{ 3 } } or R = \frac { { R }_{ 1 }{ R }_{ 2 }{ R }_{ 3 } }{ { R }_{ 1 }+{ R }_{ 2 }+{ R }_{ 3 } }

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sum of reciprocals

55. Alloys like Nichrome is made from ____________.

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Nickel, chromium and iron

56. Alloys like Manganese is made from __________, 12%manganese and 2% nickel.

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86% copper

57. 1 KW = __________

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1000 W = 1000 J/S.

58. 121. The unit of electric power consumption is equal to ______________.

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1 KWH (one Kilo Watt Hour)

59. 1 KWH = _________________

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(1000 J/S) (60 x 60 S) = 3600 x 1000 J= 3.6 x 105 J

60. The electric appliances at our home are in _____________.

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parallel connection

61. Total current drawn from the mains is equal to the sum of the currents passing
through each device is called _____________.

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Junction law

62. The minimum and maximum limitof current that can be drawn from the mains is _________.

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5 – 20A

63. The maximum current that we can draw from the mains is _______A.

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20

64. When the current drawn from the mains is more than 20A. This is called ___________.

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over loading

65. All the electric devices are saved from damage that could be caused by overload.We can save the house holding wiring and devices by using _________.

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fuses
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