Two molecules
Two ions
Two atoms
Two metal particles
Answer is Right!
Answer is Wrong!
Current electricity
42. The property of a conductor due to which it passes current is called
Resistance
Reluctance
Conductance
Inductance
Answer is Right!
Answer is Wrong!
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
0.4 ohm
0.6 ohm
0.8 ohm
1.0 ohm
Answer is Right!
Answer is Wrong!
44. Varistors are
Insulators
Nonlinear resistors
Carbon resistors
Resistors with zero temperature coefficients
Answer is Right!
Answer is Wrong!
45. A thermistor has
Positive temperature coefficient
Negative temperature coefficient
Zero temperature coefficient
Variable temperature coefficient
Answer is Right!
Answer is Wrong!
46. All of the following are equivalent to watt except
Joule/second
Ampere à volt
(Ampere)2 Ã ohm
Ampere/volt
Answer is Right!
Answer is Wrong!
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?
100 W lamp will glow brighter
40 W lamp will glow brighter
Both lamps will glow equally bright
40 W lamp will fuse
Answer is Right!
Answer is Wrong!
48. Electric current passing through the circuit produces
Magnetic effect
Luminous effect
Thermal effect
Chemical effect
Answer is Right!
Answer is Wrong!
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
Decrease
Increase
Remain constant
None of the above
Answer is Right!
Answer is Wrong!
50. What is the answer to this question? The resistance of a few meters of wire conductor in closed electrical circuit is
Practically zero
Low
High
Very high
Answer is Right!
Answer is Wrong!