Advertisements
Advertisements
प्रश्न
How long can an electric lamp of 100 W be kept glowing by fusion of 2 kg of deuterium? Take the fusion reaction as
\[\ce{^2_1H + ^2_1H -> ^3_2He + n + 3.27 MeV}\]
Advertisements
उत्तर
Number of atoms present in 2 g of deuterium = 6 × 1023
Number of atoms present in 2.0 Kg of deuterium = 6 × 1026
Energy released in fusion of 2 deuterium atoms = 3.27 MeV
Energy released in fusion of 2.0 Kg of deuterium atoms = `(3.27)/2 xx 6 xx 10^26` MeV
= 9.81 × 1026 MeV
= 15.696 × 1013 J
Energy consumed by bulb per sec = 100 J
Time for which bulb will glow = `(15.696 xx 10^13)/100` s = 4.97 × 104 year
APPEARS IN
संबंधित प्रश्न
An atom is in its excited state. Does the probability of its coming to ground state depend on whether the radiation is already present or not? If yes, does it also depend on the wavelength of the radiation present?
The energy of an atom (or ion) in its ground state is −54.4 eV. It may be
A hot gas emits radiation of wavelengths 46.0 nm, 82.8 nm and 103.5 nm only. Assume that the atoms have only two excited states and the difference between consecutive energy levels decreases as energy is increased. Taking the energy of the highest energy state to be zero, find the energies of the ground state and the first excited state.
What did J. J. Thomson's 1897 experiments on electric discharge through gases show that atoms of different elements contain?
Which statement about electrons in atoms of different elements was established by J. J. Thomson's experiments?
How is the positive charge distributed in J. J. Thomson's model of the atom?
Why is the spectrum of hydrogen considered in detail?
With whom did Ernst Rutherford create the modern theory of radioactivity?
Who carried out Rutherford's proposed alpha-particle scattering experiment around 1911?
What model resulted from the explanation of the alpha-particle scattering results?
