1. The S.I. unit of power is ______.
2. Electric pressure is also called _______.
3. The substances which have a large number of free electrons and offer a low resistance are called ______.
4. Out of the following which is not a poor conductor ?
5. Out of the following which is an insulating material ?
6. The property of a conductor due to which it passes current is called
7. Conductance is reciprocal of ______.
8. The resistance of a conductor varies inversely as ______.
9. With rise in temperature the resistance of pure metals ______.
10. With rise in temperature the resistance of semi-conductors
11. The resistance of a copper wire 200 m long is 21 Q. If its thickness (diameter) is 0.44 mm, its specific resistance is around
12. ________ are the materials having electrical conductivity much less than most of the metals but much greater than that of typical insulators.
13. An instrument which detects electric current is known as
14. In a circuit a 33 Q resistor carries a current of 2 A. The voltage across the resistor is
15. A light bulb draws 300 mA when the voltage across it is 240 V. The resistance of the light bulb is
16. The resistance of a parallel circuit consisting of two branches is 12 ohms. If the resistance of one branch is 18 ohms, what is the resistance of the other ?
17. An open resistor, when checked with an ohm-meter reads
18. A current of 16 amperes divides between two branches in parallel of resistances 8 ohms and 12 ohms respectively. The current in each branch is
19. Current velocity through a copper conductor is ______.
20. Which of the following material has nearly zero temperature co-efficient of resistance?
21. You have to replace 1500 Q resistor in radio. You have no 1500 Q resistor but have several 1000 Q ones which you would connect
22. Two resistors are said to be connected in series when
23. Which of the following statement is true both for a series and a parallel D.C. circuit?
24. Which of the following materials has a negative temperature co-efficient of resistance?
25. Ohm's law is not applicable to
26. Which is the best conductor of electricity ?
27. For which of the following 'ampere second' could be the unit ?
28. All of the following are equivalent to watt except
29. A resistance having rating 10 ohms, 10W is likely to be a
30. Which one of the following does not have negative temperature co-efficient ?
31. Thyristors are ________.
32. Insulating materials have the function of
33. The rating of a fuse wire is always expressed in
34. The minimum charge on an ion is
35. In a series circuit with unequal resistances
36. The filament of an electric bulb is made of
37. A 3 Q resistor having 2 A current will dissipate the power of
38. Which of the following statement is true?
39. The resistance of a few meters of wire conductor in closed electrical circuit is
40. If a parallel circuit is opened in the main line, the current
41. If a wire conductor of 0.2 ohm resistance is doubled in length, its resistance becomes
42. Three 60 W bulbs are in parallel across the 60 V power line. If one bulb burns open
43. The four bulbs of 40 W each are connected in series Swift a battery across them, which of the following statement is true ?
44. Two resistances R1 and R2 are connected in series across the voltage source where R2>R1. The largest drop will be across
45. What will be energy used by the battery if the battery has to drive 6.28 x 1018 electrons with potential difference of 20 V across the terminal ?
46. A closed switch has a resistance of ______.
47. The hot resistance of the bulb's filament is higher than its cold resistance because the temperature co-efficient of the filament is
48. The weight of an aluminum conductor as compared to a copper conductor of identical cross-section, for the same electrical resistance, is
49. The insulation on a current carrying conductor is provided
50. The thickness of insulation provided on the conductor depends on
51. Which of the following quantities remain the same in all parts of a series circuit ?
52. A 40 W bulb is connected in series with a room heater. If now 40 W bulb is replaced by 100 W bulb, the heater output will
53. In an electric kettle water boils in 10m minutes. It is required to boil the boiler in 15 minutes, using same supply mains
54. An electric filament bulb can be worked from
55. Resistance of a tungsten lamp as applied voltage increases
56. Electric current passing through the circuit produces
57. Resistance of a material always decreases if
58. If the efficiency of a machine is to be high, what should be low ?
59. When electric current passes through a metallic conductor, its temperature rises. This is due to
60. Two bulbs of 500 W and 200 W rated at 250 V will have resistance ratio as
61. A glass rod when rubbed with silk cloth is charged because
62. Whether circuit may be AC. or D.C. one, following is most effective in reducing the magnitude of the current.
63. It becomes more difficult to remove
64. When one leg of parallel circuit is opened out the total current will
65. In a lamp load when more than one lamp are switched on the total resistance of the load
66. Two lamps 100 W and 40 W are connected in series across 230 V (alternating). Which of the following statement is correct ?
67. Resistance of 220 V, 100 W lamp will be
68. In the case of direct current
69. When electric current passes through a bucket full of water, lot of bubbling is observed. This suggests that the type of supply is
70. Resistance of carbon filament lamp as the applied voltage increases.
71. Bulbs in street lighting are all connected in
72. For testing appliances, the wattage of test lamp should be
73. Switching of a lamp in house produces noise in the radio. This is because switching operation produces
74. Sparking occurs when a load is switched off because the circuit has high
75. Copper wire of certain length and resistance is drawn out to three times its length without change in volume, the new resistance of wire becomes
76. When resistance element of a heater fuses and then we reconnect it after removing a portion of it, the power of the heater will
77. A field of force can exist only between
78. A substance whose molecules consist of dissimilar atoms is called
79. International ohm is defined in terms of the resistance of
80. Three identical resistors are first connected in parallel and then in series. The resultant resistance of the first combination to the second will be
81. Which method can be used for absolute measurement of resistances ?
82. Three 6 ohm resistors are connected to form a triangle. What is the resistance between any two corners ?
83. Ohm's law is not applicable to
84. Two copper conductors have equal length. The cross-sectional area of one conductor is four times that of the other. If the conductor having smaller cross-sectional area has a resistance of 40 ohms the resistance of other conductor will be
85. A nichrome wire used as a heater coil has the resistance of 2 £2/m. For a heater of 1 kW at 200 V, the length of wire required will be
86. Temperature co-efficient of resistance is expressed in terms of
87. A rheostat differs from potentiometer in the respect that it
88. When current flows through heater coil it glows but supply wiring does not glow because
89. The condition for the validity under Ohm's law is that
90. All good conductors have high ______.
2. Electric pressure is also called _______.
3. The substances which have a large number of free electrons and offer a low resistance are called ______.
4. Out of the following which is not a poor conductor ?
5. Out of the following which is an insulating material ?
6. The property of a conductor due to which it passes current is called
7. Conductance is reciprocal of ______.
8. The resistance of a conductor varies inversely as ______.
9. With rise in temperature the resistance of pure metals ______.
10. With rise in temperature the resistance of semi-conductors
11. The resistance of a copper wire 200 m long is 21 Q. If its thickness (diameter) is 0.44 mm, its specific resistance is around
12. ________ are the materials having electrical conductivity much less than most of the metals but much greater than that of typical insulators.
13. An instrument which detects electric current is known as
14. In a circuit a 33 Q resistor carries a current of 2 A. The voltage across the resistor is
15. A light bulb draws 300 mA when the voltage across it is 240 V. The resistance of the light bulb is
16. The resistance of a parallel circuit consisting of two branches is 12 ohms. If the resistance of one branch is 18 ohms, what is the resistance of the other ?
17. An open resistor, when checked with an ohm-meter reads
18. A current of 16 amperes divides between two branches in parallel of resistances 8 ohms and 12 ohms respectively. The current in each branch is
19. Current velocity through a copper conductor is ______.
20. Which of the following material has nearly zero temperature co-efficient of resistance?
21. You have to replace 1500 Q resistor in radio. You have no 1500 Q resistor but have several 1000 Q ones which you would connect
22. Two resistors are said to be connected in series when
23. Which of the following statement is true both for a series and a parallel D.C. circuit?
24. Which of the following materials has a negative temperature co-efficient of resistance?
25. Ohm's law is not applicable to
26. Which is the best conductor of electricity ?
27. For which of the following 'ampere second' could be the unit ?
28. All of the following are equivalent to watt except
29. A resistance having rating 10 ohms, 10W is likely to be a
30. Which one of the following does not have negative temperature co-efficient ?
31. Thyristors are ________.
32. Insulating materials have the function of
33. The rating of a fuse wire is always expressed in
34. The minimum charge on an ion is
35. In a series circuit with unequal resistances
36. The filament of an electric bulb is made of
37. A 3 Q resistor having 2 A current will dissipate the power of
38. Which of the following statement is true?
39. The resistance of a few meters of wire conductor in closed electrical circuit is
40. If a parallel circuit is opened in the main line, the current
41. If a wire conductor of 0.2 ohm resistance is doubled in length, its resistance becomes
42. Three 60 W bulbs are in parallel across the 60 V power line. If one bulb burns open
43. The four bulbs of 40 W each are connected in series Swift a battery across them, which of the following statement is true ?
44. Two resistances R1 and R2 are connected in series across the voltage source where R2>R1. The largest drop will be across
45. What will be energy used by the battery if the battery has to drive 6.28 x 1018 electrons with potential difference of 20 V across the terminal ?
46. A closed switch has a resistance of ______.
47. The hot resistance of the bulb's filament is higher than its cold resistance because the temperature co-efficient of the filament is
48. The weight of an aluminum conductor as compared to a copper conductor of identical cross-section, for the same electrical resistance, is
49. The insulation on a current carrying conductor is provided
50. The thickness of insulation provided on the conductor depends on
51. Which of the following quantities remain the same in all parts of a series circuit ?
52. A 40 W bulb is connected in series with a room heater. If now 40 W bulb is replaced by 100 W bulb, the heater output will
53. In an electric kettle water boils in 10m minutes. It is required to boil the boiler in 15 minutes, using same supply mains
54. An electric filament bulb can be worked from
55. Resistance of a tungsten lamp as applied voltage increases
56. Electric current passing through the circuit produces
57. Resistance of a material always decreases if
58. If the efficiency of a machine is to be high, what should be low ?
59. When electric current passes through a metallic conductor, its temperature rises. This is due to
60. Two bulbs of 500 W and 200 W rated at 250 V will have resistance ratio as
61. A glass rod when rubbed with silk cloth is charged because
62. Whether circuit may be AC. or D.C. one, following is most effective in reducing the magnitude of the current.
63. It becomes more difficult to remove
64. When one leg of parallel circuit is opened out the total current will
65. In a lamp load when more than one lamp are switched on the total resistance of the load
66. Two lamps 100 W and 40 W are connected in series across 230 V (alternating). Which of the following statement is correct ?
67. Resistance of 220 V, 100 W lamp will be
68. In the case of direct current
69. When electric current passes through a bucket full of water, lot of bubbling is observed. This suggests that the type of supply is
70. Resistance of carbon filament lamp as the applied voltage increases.
71. Bulbs in street lighting are all connected in
72. For testing appliances, the wattage of test lamp should be
73. Switching of a lamp in house produces noise in the radio. This is because switching operation produces
74. Sparking occurs when a load is switched off because the circuit has high
75. Copper wire of certain length and resistance is drawn out to three times its length without change in volume, the new resistance of wire becomes
76. When resistance element of a heater fuses and then we reconnect it after removing a portion of it, the power of the heater will
77. A field of force can exist only between
78. A substance whose molecules consist of dissimilar atoms is called
79. International ohm is defined in terms of the resistance of
80. Three identical resistors are first connected in parallel and then in series. The resultant resistance of the first combination to the second will be
81. Which method can be used for absolute measurement of resistances ?
82. Three 6 ohm resistors are connected to form a triangle. What is the resistance between any two corners ?
83. Ohm's law is not applicable to
84. Two copper conductors have equal length. The cross-sectional area of one conductor is four times that of the other. If the conductor having smaller cross-sectional area has a resistance of 40 ohms the resistance of other conductor will be
85. A nichrome wire used as a heater coil has the resistance of 2 £2/m. For a heater of 1 kW at 200 V, the length of wire required will be
86. Temperature co-efficient of resistance is expressed in terms of
87. A rheostat differs from potentiometer in the respect that it
88. When current flows through heater coil it glows but supply wiring does not glow because
89. The condition for the validity under Ohm's law is that
90. All good conductors have high ______.
1 comment:
sir PDF link and answers of those questions pls
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