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1
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The example of a non-ohmic resistance is
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Diode
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2
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Which of the following has higher magnetic susceptibility?
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Ferromagnetic
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3
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Light goes from one medium to another, then it bends. The bending of ray is called as:-
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Refraction
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4
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The magnetic induction at an X axial Point and magnetic moment of a bar magnet are
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Parallel
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5
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In TV broadcasting uses frequency is
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30 - 300 MHz
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6
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Electromagnetic induction is discovered
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Faraday
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7
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The role of self inductance is equivalent to
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Inertia
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8
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When the south pole of a magnet is moved away from any coil then the direction of induced current in the coil will be?
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Anticlockwise
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9
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Magnetic flux per unit area (A) is?
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Magnetic Field Density
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10
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Lenz’s Law is related to
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Energy
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11
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The device which converted mechanical energy into electrical energy, known as
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Dynamo
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12
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Reactance of a capacitor decreases as the frequency of the alternating current
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Decreases
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13
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Transformer is a setup, which
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For increasing or decreasing the voltage of AC
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14
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Ni and N2 are numbers of turns in primary and secondary coils of step up transformers, then?
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N2 > N1
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15
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Which of the following is not an electromagnetic wave?
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Sound Wave
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16
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Electromagnetic waves are:
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Transverse
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17
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Due to which mirror smaller and virtual image forms than object?
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Convex Mirror
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18
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Due to which mirror magnified and virtual image formed the object?
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Concave Mirror
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19
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The focal length of a plane mirror is?
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Infinity
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20
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If light source is line type of source, then at finite distance wave front is
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Cylindrical
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21
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Polarization can be done of electric magnetic wave
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By Pollaroid
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22
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Wave front coming from unknown shaped source from large distance is
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Plane
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23
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Huygens secondary wave principle is used to
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New geometrical position of wavelength
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24
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intensity of light is inverse square law, i.e. intensity & valid for?
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Point Source
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25
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Cathode rays are group of? |
Electron
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26
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Due to increasing the temperature of the semiconductor its resistance will?
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Decrease
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27
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Cathode Rays are
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Negative charged Particles
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28
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With Milliken's oil drop experiment, determines the electrons'?
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Charge
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29
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To obtain the atomic model, which phenomenon is used related to a-particles?
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Scattering
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30
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Rutherford's scattering experiment proves the existence of?
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Positively Charged Nucleus
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