The waves do not require a medium for propagation is called
A Longitudinal waves
B Mechanical waves
C Electromagnetic waves
D None of them
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An oscillatory vibratory motion is always under
A Gravitation force
B Periodic force
C Applied force
D Elastic restoring force
The waves which require a medium for propagation is called
A Electromagnetic waves
B Mechanical waves
C Long waves
D None of them
Frequency and time period are
A Equal to each other
B Equal to each other but in opposite direction
C Reciprocal to each other
D None of them
The S.I unit of frequency is
A Meter
B Newton
C Kilogram
D Hertz
The value of gravity is?
A 6.02
B 9.8
C 3.4
D None
Submitted by: Tarique Alee
According to Max Planck energy is released or absorbed in discreet packets called?
A Quanta
B meson
C energy shell's
D None
Submitted by: Tarique Alee
Pair production occurs only when the energy of photon is at least equal
A 1.02 eV
B 1.02 keV
C 1.02 MeV
D None
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The emission of electrons when certain metal surface is exposed to electromagnetic radiations called?
A pair production
B Compton effect
C photo electric effect
D None
Submitted by: Tarique Alee
The charge on a proton is
A 1.6x 10c
B 1.6x 1019 c
C 1.6x 10° C
D 1.6x 109c