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Recent questions tagged modern physics
+2
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1
answer
The technique used to transmit audio signals in television broadcasts is :
asked
Apr 7, 2019
in
Physics
by
kratos
atom models
modern physics
csat
jee
communication systems
class-10
jee mains
class-12
quantum physics
+1
vote
1
answer
The stopping potential in an experiment on photoelectric effect is 1.5V.
asked
Apr 6, 2019
in
Physics
by
kratos
photons
modern physics
jee main 2020
jee
matter waves
jee mains
+3
votes
1
answer
Find the minimum kinetic energy of an α-particle to cause the reaction 14N (α, p) 17O.
asked
Apr 5, 2019
in
Physics
by
kratos
neet
modern physics
aiims
jee
the nucleus
jee mains
class-12
+2
votes
1
answer
Three photons coming from excited atomic-hydrogen sample are picked up. Their energies are
asked
Apr 4, 2019
in
Physics
by
kratos
modern physics
jee
physics of the atom
jee mains
class-12
+1
vote
1
answer
A radon 220Rn86 nucleus emits an alpha particle becomes a
asked
Apr 4, 2019
in
Physics
by
kratos
jee
modern physics
nuclear physics
jee mains
+3
votes
1
answer
Calculate (a) the wavelength and (b) the frequency of the Hβ line of the Balmer series for hydrogen.
asked
Apr 4, 2019
in
Physics
by
kratos
neet
modern physics
jee
aiims
jee mains
class-12
atoms
+2
votes
1
answer
A sample of radioactive material has mass m, decay constant λ, and molecular weight M.
asked
Apr 3, 2019
in
Physics
by
kratos
jee
class-12
modern physics
jee mains
+3
votes
1
answer
Lights of two different frequencies, whose photons have energies 1 eV and 2.5 eV respectively,
asked
Apr 3, 2019
in
Physics
by
kratos
neet
modern physics
jee
aiims
dual nature of radiation and matter
jee mains
class-12
+1
vote
1
answer
Light corresponding to the transition n = 4 to n = 2 in hydrogen atoms falls on cesium metal having work function
asked
Apr 3, 2019
in
Physics
by
kratos
modern physics
jee
jee mains
class-12
atomic physics
+1
vote
1
answer
The wavelength of light from the spectral emission line of sodium is 589 nm. Find the kinetic energy at which
asked
Apr 3, 2019
in
Physics
by
kratos
modern physics
class-11
jee
dual nature of radiation and matter
light waves
jee mains
class-12
+3
votes
1
answer
An α-particle is bombarded on 14N. As a result, a 17O nucleus is formed and a particle is emitted.This particle is a
asked
Apr 3, 2019
in
Physics
by
kratos
neet
modern physics
jee
the nucleus
jee mains
class-12
atoms
nuclei
+1
vote
1
answer
Tritium is an isotope of hydrogen whose nucleus Triton contains 2 neutrons and 1 proton.
asked
Apr 3, 2019
in
Physics
by
kratos
modern physics
jee
ntse
jee mains
class-12
atoms
nuclear physics
nuclei
+1
vote
1
answer
In the X-rays tube before striking the target we accelerate the electrons through a potential difference of U volt.
asked
Apr 2, 2019
in
Physics
by
kratos
modern physics
atom models
quantum physics
class-12
jee mains
jee
+1
vote
1
answer
The counting rate observed from a radioactive source at t = 0 second was 1600 counts per second and at t = 8
asked
Apr 2, 2019
in
Physics
by
kratos
neet
modern physics
jee
aiims
thermodynamics
statistical physics
jee mains
particle physics
+2
votes
1
answer
In Moseley'* equation √f = a(z - b), a and b are constant. Find their values with the help of the following data.
asked
Apr 1, 2019
in
Physics
by
kratos
modern physics
x-rays
jee
jee mains
class-12
+1
vote
1
answer
What does the ? represent in the nuclear reaction 6Li3 + ? → 7Li3
asked
Apr 1, 2019
in
Physics
by
kratos
modern physics
jee
nuclear physics
jee mains
+3
votes
1
answer
An electron and an alpha particle have the same de Broglie wavelength associated with them. How are their kinetic energies related to each other ?
asked
Mar 31, 2019
in
Physics
by
kratos
class-12
cbse
dual nature of radiation and matter
modern physics
+1
vote
1
answer
It is possible for an electron and a positron to orbit around their stationary center of mass until they annihilate each other,
asked
Mar 30, 2019
in
Physics
by
kratos
irodov
modern physics
jee
jee mains
elementary particles
nuclear physics
+3
votes
1
answer
The mean lives of a radio-active substances are 1620 year and 405 years for α-emission and β-emission respectively.
asked
Mar 30, 2019
in
Physics
by
kratos
jee
modern physics
jee mains
+2
votes
1
answer
The rate at which heat is produced in the X-ray tube is approximately
asked
Mar 30, 2019
in
Physics
by
kratos
isc
modern physics
x-rays
jee main 2021
jee
icse
jee mains
jee main
class-12
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