問題一覧
1
Reciprocal of resistance of conductor is
conductance
2
At equator the dip is
0°
3
Lines joining the place of zero declination
Agonic lines
4
It is a device which Converts low voltage A.C into High voltage A.C & High voltage A.C into Low voltage A.C
transformer
5
This device connects mechanical Energy into electric energy
A.C dynamo or Generator
6
power of convex lens is
positive
7
Electric fuse are connected in
series
8
In a leclanche cell what acts as anode
carbon rods
9
when light ray la falls on small bodies such as dust particles and they are thorwn out in all directions, this phenomenon is called
tyndall effect
10
1 kilowatt equals to
3.6×10⁶ joules
11
For nuclear fusion temprature of the oder of what is required
10⁸k
12
Charge required to increase the potential of the conductor by unity
electric capacity
13
Device used to detect and measure small electric current in a circuit
galvanometer
14
Red color of Rising and setting sun is due to
scattering of light
15
A nuclear reactor which can be produce more fissionable fuels that it consumes
Fast breeder reactor
16
It absorbs the heat and prevent excessive rise in temperature
coolant
17
This device converts electric energy into mechanical Energy
electric motor
18
ammeter is connected in
series
19
In voltaic cell what is used as cathode
zinc rod
20
Green+ Red
yellow
21
It is used to produce electric energy from the energy released during fiasion
Nuclear reactor
22
This rainbow formed due to two refraction and two Total internal reflection of light
secondary rainbow
23
Production of electricity by chemical reaction was first discovered by
Alexandero de Volta
24
Lines joining the place of same value of horizontal component of earth's maflgnetic field
Isodynamic lines
25
power of concave Lens is
negative
26
The emf of leclanche cell is
1.5 volt
27
Inside the magnet the magnetic lines of force form
South to North Pole
28
Scattering of light is max in
Violet
29
Substance which when placed in a magnetic field acquire a feeble magnetism in the direction of the field
Paramagnetic substance
30
Lines joining the place of same dip
Isoclinic lines
31
Our earth south pole is near the geographical
North Pole
32
It is a point in a electric field is the work done in bringing a unit positive charge from infinity to that point
electric potential
33
Si unit of power is
dioptre
34
Outside the magnet the magnetic lines of force form
North to south
35
It is the angle which the resultant earth's magnetic field at a place makes with the horizontal.
Dip or inclination
36
Scattering of light is min in
red
37
Lines joining the point of zero dig
Aclinic lines
38
Si unit of magnetism is
Newton/ampère meter or Weber/meter² or Tesla
39
carbon rod and zinc rod in leclanche cell are placed in
ammonium chloride
40
Imaginary lines joining two poles of magnet is called
magnetic axis of magnet
41
Earth receive what joule of energy per second from sun
4×10⁶
42
Fissionable fuels
U²³⁵ & U²³⁹
43
Si unit of resistance is
Ohm
44
When magnet is suspenseded freely it aligns itself in the direction of
North south direction
45
The acute angle between the magnetic Meridian and geographical Meridian at a place
declination
46
In color television which color is used
primary
47
Si unit of electric potential is
volt
48
Red rose appears black when viewed in
Blue or green light
49
As temperature increases the magnetic property of ferromagnetic substance
Decreases
50
Red rose appears red when viewed in
white or red light
51
who gave mass energy relation on basis of special theory of relativity
Albert Einstein
52
resistance to ammeter is
0
53
It decrease the energy of neutron
Moderator
54
Hydrogen bomb was made in
1952
55
Our earth Nole pole is near the geographical
south pole
56
Direction of induced current is determined with the help of
Fleming right hand rule
57
The reciprocal of resistivity of conductor
conductivity
58
It can be converted into ammeter by connecting a shunt parallel to it
Galvanometer
59
Substance which when placed in a magnetic field acquire feeble magnetism opposite to the direction of Magnetic field
Diamagnetic substance
60
Si unit of conductance is
ohm-¹ / siemen / mho
61
Resistance of voltmeter is
infinite
62
Wire of very small resistance
Shunt
63
Substance which when placed in a magnetic field are strongly magnetised in the direction of field
Ferromagnetic substance
64
This rainbow formed due to two refraction and one Total internal reflection of light
primary rainbow
65
In a leclanche cell what acts as cathode
zinc rod
66
Si unit of electric current
ampère
67
Pure fuse is made up of
Tin
68
Emf of dry cell
1.5 volts
69
First nuclear reactor was established in
Chicago university
70
Lines joining the place of same declination
isogonic lines
71
Blue + Green
Cyan
72
Current is
scalar quantity
73
Production of electricity by chemical reaction was first discovered in
1794
74
Si unit of electric capacity
Farad
75
power of lens
1/f
76
Energy released by sun or other stars is by
nuclear fusion
77
At pole the dip is
90°
78
Si unit of resistance is
Ohm meter
79
1 ampère equals to
6.25×10¹⁸ Electron
80
Red+blue
magenta
81
Converts sound energy into electrical energy
microphone
82
As temperature increases the magnetic property of ferromagnetic substance decreases and above a certain temperature the substance changes into paramagnetic substance, this temperature is called
curie temperature
83
Electric field intensity inside a charged hollow conductor is
0
84
It is a device which converts chemical energy into electrical energy
electrochemical cells
85
Albert Einstein received noble prize of physics in
1921
86
It is used to absord the excess neutrons produced in fission of uranium nuclues
Control rod
87
Mass of sun is decreasing at the rate of
4×10-⁹ kg/s
88
Primary colors are
RBG
89
When Lens is thicker at the edge than the middle it is called
concave Lens
90
Lens of human eye consist
convex lens
91
Where does magnet have less power
In the middle
92
When Lens is thicker at the middle than the edge it is called
convex lens
93
Work done in bringing a unit positive charge from one point to other point
Potential difference
94
who said that mass can be converted into energy and vice versa
Albert Einstein
95
Yellow+magenta+cyan
white
96
what is determined with the help of Fleming right hand rule
direction of induced current
97
In voltaic cell what is used as anode
Zinc rod
98
galvanometer can measure current upto
10-⁶ ampère
99
Galvanometer It can be converted into what by connecting a shunt parallel to it
ammeter
100
Zinc rod and copper rod in voltaic cell are placed in
sulphuric acid