CURRENT ELECTRICITY PART 8

CURRENT ELECTRICITY PART 8

71. A glass rod when rubbed with Silk cloth is charged because

a. it takes in Proton 

b. atom are removed

c.  It gives away electrons

d. it gives away positive charge

72. Weather circuit may be AC or DC one following is most effective in reducing the magnitude of the current

a. reactor 

b.capacitor

c. inductor 

d.resistor

73. It becomes more difficult to remove

a. any electron from  orbit

b. first electron from  orbit

c. second electron from the orbit

d.third electron from the orbit

74. When one leg of parallel circuit is opened out the total current will 

a. increase

b . decrease

c. become zero

d.reduce

75.  In lamp load when more than one lamp are switched  on the total resistance of the load

a. increases 

b. decreases

c. remain same 

d. none of the above

76.  Two lamps100 W and 40 W  are connected in series across 230 V (alternating).which of the following statement is correct

a. 100 W lamp will glow brighter 

b. 40W lamp will glow brighter

c. both will glow equally bright 

d. 40W lamp will fuse

77.  Resistance of 220 V 100 Watt lamp will be

a. 4.84 ohm

b.48.4 Ohm

c. 484 ohm

d.  4840 ohm

78. In the case of direct current ...

a. magnitude and direction of current remains constant 

b. magnitude  and direction of current changes with time 

c.magnitude of current changes with time 

c. of current remains constant

79.  When electric current passing through a bucket full of water lot of bubbling is observed. this suggest that  type of supply is

a. AC 

b.DC

c. any of above

d. none of the above

80.  Resistance of carbon filament lamp............. as the applied voltage increases 

a. Increase

b. decreases 

c.remains same 

d.none of the above

ANSWER 

71.c, 72. D, 73.d, 74.c, 75.b 76.b, 77.c, 78. a, 79 b 80.b

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To be continued......

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