Physics
Suppose that the electric field amplitude of an electromagnetic wave is E0 =120 N/C and that its frequency is ν=50.0MHz. (a) Determine, B0 ,ω,k,and λ (b) Find the expression for E and B.
04
Sep
Suppose that the electric field amplitude of an electromagnetic wave is E0 =120 N/C and that its frequency is ν=50.0MHz. (a) Determine, B0 ,ω,k,and λ (b) Find the expression for E and B. and λ (b) Find the expression for E and B. B0 K Suppose that the electric field amplitude of an [...]
The amplitude of the magnetic field part of a harmonic electromagnetic wave in vacuum is B0 = 510 nT. What is the amplitude of the electric field part of the wave?
04
Sep
The amplitude of the magnetic field part of a harmonic electromagnetic wave in vacuum is B0 = 510 nT. What is the amplitude of the electric field part of the wave? The amplitude of the magnetic field part of a harmonic electromagnetic wave in vacuum is B0 = 510 nT. What is the [...]
A radio can tune in to any station in the 7.5 MHz to 12 MHz band. What is the corresponding wavelength band?
04
Sep
A radio can tune in to any station in the 7.5 MHz to 12 MHz band. What is the corresponding wavelength band? A radio can tune in to any station in the 7.5 MHz to 12 MHz band. What is the corresponding wavelength band? September 4, 2021 Category: Chapter 8 - Electromagnetic Waves , NCERT [...]
A plane electromagnetic wave travels in vacuum along z-direction. What can you say about the directions of its electric and magnetic field vectors? If the frequency of the wave is 30 MHz, what is its wavelength?
04
Sep
A plane electromagnetic wave travels in vacuum along z-direction. What can you say about the directions of its electric and magnetic field vectors? If the frequency of the wave is 30 MHz, what is its wavelength? A plane electromagnetic wave travels in vacuum along z-direction. What can you say about the directions of its electric [...]
Sometimes a radioactive nucleus decays into a nucleus which itself is radioactive . An example is Assume that we start with 1000 38S nuclei at time t=0. the number of 38Cl of count zero at t=0 and will again be zero at t=∞. At what value of t, would the number of counts be a maximum?
09
Jun
Sometimes a radioactive nucleus decays into a nucleus which itself is radioactive . An example is Assume that we start with 1000 38S nuclei at time t=0. the number of 38Cl of count zero at t=0 and will again be zero at t=∞. At what value of t, would the number of counts be a [...]
A piece of wood form the ruins of an nuclei an ancient building was found to have a .14C activity of 12 disintegrations per minute per gram of its carbon content. The .14C activity of the living wood is 16 disintegrations / minute / gram. How long ago did the trees, form which the wooden sample came, die? Given half-life of .14C is 5760 years.
09
Jun
A piece of wood form the ruins of an nuclei an ancient building was found to have a .14C activity of 12 disintegrations per minute per gram of its carbon content. The .14C activity of the living wood is 16 disintegrations / minute / gram. How long ago did the trees, form which the wooden [...]
Consider a radioactive nucleus A which decays to a stable nucleus C through the following sequences: A→B→C Here, B is an intermediate nucleus which is also radioactive. Considering that are N0 atoms of A initially, plot the graph showing the variation of number of atoms of A and B versus time.
09
Jun
Consider a radioactive nucleus A which decays to a stable nucleus C through the following sequences: A→B→C Here, B is an intermediate nucleus which is also radioactive. Considering that are N0 atoms of A initially, plot the graph showing the variation of number of atoms of A and B versus time. B is an intermediate [...]
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B is an intermediate nucleus which is also radioactive. Considering that are N0 atoms of A initially ,
Consider a radioactive nucleus A which decays to a stable nucleus C through the following sequences: A→B→C Here ,
plot the graph showing the variation of number of atoms of A and B versus time. ,
Which one of the following can not emit radiation and why? Excited nucleus, excited electron.
09
Jun
Which one of the following can not emit radiation and why? Excited nucleus, excited electron. excited electron. Which one of the following can not emit radiation and why? Excited nucleus June 9, 2021 Category: Chapter 13 - Nuclei , NCERT Exemplar Class 12 , Physics ,
Draw a graph showing the variation of decay rate with number of active nuclei.
09
Jun
Draw a graph showing the variation of decay rate with number of active nuclei. Draw a graph showing the variation of decay rate with number of active nuclei. June 9, 2021 Category: Chapter 13 - Nuclei , NCERT Exemplar Class 12 , Physics ,
Tritium is an isotope of hydrogen whose nucleus triton contains 2 neutrons and 1 proton . Free neutrons decay into p+e¯+n¯. If one of the neutrons in Triton decays , it would transform into He^3 nucleus. This does not happen. This is because
09
Jun
Tritium is an isotope of hydrogen whose nucleus triton contains 2 neutrons and 1 proton . Free neutrons decay into p+e¯+n¯. If one of the neutrons in Triton decays , it would transform into He^3 nucleus. This does not happen. This is because it would transform into He^3 nucleus. This does not happen. This is [...]