Question 1.
Which elements are malleable and good conductors of electricity?
A. Tin and silver
B. Iodine and silver
C. Tin and xenon
D. Iodine and xenon
Ans: A. Tin and silver
Question 2.
If a copper wire is increased to double its length, its resistance will become
A. Four times
B. One–fourth
C. Double
D. Half
Ans: A. Four times
Question 3.
The electrical domestic tube light gives white fluorescent light because of
A. Colision between molecules of filled gas under electric current
B. Heavy current
C. Vacuum inside the tube
D. Falling of ultra violet rays on the white inner coating of the tube
Ans: D. Falling of ultra violet rays on the white inner coating of the tube
Question 4.
The coil wire in the electric room heater or electric cooking heater is called __
A. Circuit
B. Element
C. Filament
D. Cells
Ans: B. Element
Question 5.
What is the resistance (in ohm) of an electrical component if a current of 0.1 A passes through it on application of 5 V of potential difference across it?
A. 0.5
B. 100
C. 50
D. 1
Ans: C. 50
Question 6.
The filament of electric bulb is made up of :
A. Copper
B. Nichrome
C. Lead
D. Tungsten
Ans: D. Tungsten
Question 7.
The unit for measuring electric power is the
A. Steridian
B. Watts
C. Watts
D. Volts
Ans: C. Watts
Question 8.
The composition of electrician solder is
A. Lead-37%, tin-63%
B. Iron-37%, tin-63%
C. Lead-37%, Steel-63%
D. Steel-37%, copper-63%
Ans: A. Lead-37%, tin-63%
Question 9.
If electric resistance is to be decreased, then the number of resistances should be connected in __
A. Series
B. Parallel
C. Mixed arrangement
D. None of these
Ans: B. Parallel
Question 10.
Full form of CFL used in place of electric bulbs is
A. Compact fluorescent lamp
B. Constantan filament lamp
C. Closed filament lamp
D. Closed fluorescent lamp
Ans: A. Compact fluorescent lamp
Question 11.
The device used to change the speed of an electric fan is
A. Amplifier
B. Regulator
C.Switch
D. Rectifier
Ans: B. Regulator
Question 12.
An electric iron of 750 W is used for S hours per day. Then the energy consumed in one day by the iron is:
A. 6 units
B. 600 units
C. 0.6 units
D. 60 units
Ans: A. 6 units
Question 13.
Ampere second could be the unit of
A. Power
B. Energy
C.Conductance
D. Charge
Ans: C.Conductance
Question 14.
Two electric bulbs marked 25W – 220V and 100W – 220V are connected in series to a 440Vsupply. Which of the bulbs will fuse?
A. 25 W
B. Both
C. 100 W
D. Neither
Ans: A. 25 W
Question 15.
The material used in electric heater is
A. Tungsten
B. Nichrome
C. Brass
D. Steel
Ans: B. Nichrome
Question 16.
The purpose of choke in tube light is
A. Induce high voltage
B. Induce low resistance
C. Induce high resistance
D. Induce low voltage
Ans: A. Induce high voltage
Question 17.
Which one of the following is a good electrical conductor?
A. Graphite
B. Diamond
C. Peat
D. Charcoal
Ans: A. Graphite
Question 18.
1 WH =
A. 360 joules
B. 36000 joules
C. 3600 joules
D. 36 joules
Ans: C. 3600 joules
Question 19.
After long periods of use, a grey spot develops on the inside of a bulb. This is because
A. The tungsten filament evaporates and collects there
B. The heat of the bulb scorches the glass at the top
C. Dust inside the bulb condenses on the top
D. Glass undergoes a change due to the heat
Ans: C. Dust inside the bulb condenses on the top
Question 20.
Electricity is transmitted over long distances
A. It is fast
B. There is less wastage of energy
C. It is safer
D. It is cheaper
Ans: B. There is less wastage of energy
Physics GK MCQs all set
- Physics MCQs Set-1
- Physics MCQs Set-2
- Physics MCQs Set-3
- Physics MCQs Set-4
- Physics MCQs Set-5
- Physics MCQs Set-6
- Physics MCQs Set-7
- Physics MCQs Set-8
- Physics MCQs Set-9
- Physics MCQs Set-10
- Physics MCQs Set-11
- Physics MCQs Set-12
- Physics MCQs Set-13
- Physics MCQs Set-14
- Physics MCQs Set-15
- Physics MCQs Set-16
- Physics MCQs Set-17
- Physics MCQs Set-18
- Physics MCQs Set-19
- Physics MCQs Set-20
- Physics MCQs Set-21
- Physics MCQs Set-22
- Physics MCQs Set-23
- Physics MCQs Set-24
- Physics MCQs Set-25
- Physics MCQs Set-26
- Physics MCQs Set-27
- Physics MCQs Set-28
- Physics MCQs Set-29
- Physics MCQs Set-30
- Physics MCQs Set-31
- Physics MCQs Set-32
- Physics MCQs Set-33
- Physics MCQs Set-34
- Physics MCQs Set-35
- Physics MCQs Set-36
- Physics MCQs Set-37
- Physics MCQs Set-38
- Physics MCQs Set-39
- Physics MCQs Set-40
- Physics MCQs Set-41
- Physics MCQs Set-42
- Physics MCQs Set-43
- Physics MCQs Set-44
- Physics MCQs Set-45
- Physics MCQs Set-46
- Physics MCQs Set-47
- Physics MCQs Set-48
- Physics MCQs Set-49
- Physics MCQs Set-50
- Physics MCQs Set-51
- Physics MCQs Set-52
- Physics MCQs Set-53
- Physics MCQs Set-54
- Physics MCQs Set-55
- Physics MCQs Set-56
- Physics MCQs Set-57
- Physics MCQs Set-58
- Physics MCQs Set-59
- Physics MCQs Set-60
- Physics MCQs Set-61
- Physics MCQs Set-62
- Physics MCQs Set-63
- Physics MCQs Set-64
- Physics MCQs Set-65
- Physics MCQs Set-66
- Physics MCQs Set-67
- Physics MCQs Set-68
- Physics MCQs Set-69
- Physics MCQs Set-70
- Physics MCQs Set-71
- Physics MCQs Set-72
- Physics MCQs Set-73
- Physics MCQs Set-74
- Physics MCQs Set-75
- Physics MCQs Set-76
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