[amp_mcq option1=”Two molecules” option2=”Two ions” option3=”Two atoms” option4=”Two metal particles” correct=”option3″]
Current electricity
42. The property of a conductor due to which it passes current is called
[amp_mcq option1=”Resistance” option2=”Reluctance” option3=”Conductance” option4=”Inductance” correct=”option3″]
Detailed SolutionThe property of a conductor due to which it passes current is called
43. If a wire conductor of 0.2 ohm resistance is doubled in length, its resistance becomes
[amp_mcq option1=”0.4 ohm” option2=”0.6 ohm” option3=”0.8 ohm” option4=”1.0 ohm” correct=”option1″]
44. Varistors are
[amp_mcq option1=”Insulators” option2=”Nonlinear resistors” option3=”Carbon resistors” option4=”Resistors with zero temperature coefficients” correct=”option2″]
45. A thermistor has
[amp_mcq option1=”Positive temperature coefficient” option2=”Negative temperature coefficient” option3=”Zero temperature coefficient” option4=”Variable temperature coefficient” correct=”option2″]
46. All of the following are equivalent to watt except
[amp_mcq option1=”Joule/second” option2=”Ampere à volt” option3=”(Ampere)2 à ohm” option4=”Ampere/volt” correct=”option4″]
Detailed SolutionAll of the following are equivalent to watt except
47. Two lamps 100 W and 40 W are connected in series across 230 V (alternating). Which of the following statement is correct?
[amp_mcq option1=”100 W lamp will glow brighter” option2=”40 W lamp will glow brighter” option3=”Both lamps will glow equally bright” option4=”40 W lamp will fuse” correct=”option4″]
48. Electric current passing through the circuit produces
[amp_mcq option1=”Magnetic effect” option2=”Luminous effect” option3=”Thermal effect” option4=”Chemical effect” correct=”option1″]
Detailed SolutionElectric current passing through the circuit produces
49. When resistance element of a heater fuses and then we reconnect it after removing a portion of it, the power of the heater will
[amp_mcq option1=”Decrease” option2=”Increase” option3=”Remain constant” option4=”None of the above” correct=”option1″]
50. What is the answer to this question? The resistance of a few meters of wire conductor in closed electrical circuit is
[amp_mcq option1=”Practically zero” option2=”Low” option3=”High” option4=”Very high” correct=”option2″]