The voltage across the resistor is A. 33 V
66 V
80 V
132 V
Answer is Right!
Answer is Wrong!
Detailed SolutionIn a circuit a 33 Ohm resistor carries a current of 2
Current electricity
82. Which of the following can have negative temperature coefficient?
Compounds of silver
Liquid metals
Metallic alloys
Electrolytes
Answer is Right!
Answer is Wrong!
Detailed SolutionWhich of the following can have negative temperature coefficient?
83. Out of the following which is not a poor conductor?
Cast iron
Copper
Carbon
Tungsten
Answer is Right!
Answer is Wrong!
Detailed SolutionOut of the following which is not a poor conductor?
84. The resistance of a copper wire 200 m long is 21 $$\Omega .$$ If its thickness (diameter) is 0.44 mm, its specific resistance is around
1.2 x 10-8 $$Omega $$-m
1.4 x 10-8 $$Omega $$-m
1.6 x 10-8 $$Omega $$-m
1.8 x 10-8 $$Omega $$-m
Answer is Right!
Answer is Wrong!
85. Whether circuit may be AC. or D.C. one, following is most effective in reducing the magnitude of the current.
Reactor
Capacitor
or
Resistor
Answer is Right!
Answer is Wrong!
86. Resistance of a tungsten lamp as applied voltage increases
Decreases
Increases
Remains same
None of the above
Answer is Right!
Answer is Wrong!
Detailed SolutionResistance of a tungsten lamp as applied voltage increases
87. The ratio of mass of proton to that of electron is nearly
1840
1480
30
4
Answer is Right!
Answer is Wrong!
Detailed SolutionThe ratio of mass of proton to that of electron is nearly
88. In a lamp load when more than one lamp are switched on the total resistance of the load
Increases
Decreases
Remains same
None of the above
Answer is Right!
Answer is Wrong!
89. Out of the following which is an insulating material?
Copper
Gold
Silver
Paper
Answer is Right!
Answer is Wrong!
Detailed SolutionOut of the following which is an insulating material?