142663 A monochromatic light of frequency \(3 \times 10^{14}\) \(\mathrm{Hz}\) is produced by a LASER, emits the power of \(3 \times 10^{-3} \mathrm{~W}\). Find how many number of photons are emitted per second.

142666 An electron and proton are produced by breaking of a neutron. If the mass of neutron. electron and proton are \(1.675 \times 10^{-27} \mathrm{~kg}\), \(9 \times 10^{-31} \mathrm{~kg}\) and \(1.6730 \times 10^{-27} \mathrm{~kg}\) respectively, find the amount of energy released in this process.
(consider velocity of light as \(3 \times 10^8 \mathrm{~m} / \mathrm{s}\) )

142671 Assertion: If the speed of charged particle increases both the mass as well as charge increases.
Reason: If \(m_0=\) rest mass and \(m\) be mass at velocity \(v\) then \(m=\frac{m_0}{\sqrt{1-\frac{v^2}{c^2}}}\)
where \(\mathrm{c}=\) speed of light.

142674 Rest mass energy of electron is \(0.51 \mathrm{MeV}\). If a moving electron has a kinetic energy of 9.69 \(\mathrm{MeV}\), then the ratio of the mass of the moving electron to its rest mass will be.

142663 A monochromatic light of frequency \(3 \times 10^{14}\) \(\mathrm{Hz}\) is produced by a LASER, emits the power of \(3 \times 10^{-3} \mathrm{~W}\). Find how many number of photons are emitted per second.

142666 An electron and proton are produced by breaking of a neutron. If the mass of neutron. electron and proton are \(1.675 \times 10^{-27} \mathrm{~kg}\), \(9 \times 10^{-31} \mathrm{~kg}\) and \(1.6730 \times 10^{-27} \mathrm{~kg}\) respectively, find the amount of energy released in this process.
(consider velocity of light as \(3 \times 10^8 \mathrm{~m} / \mathrm{s}\) )

142671 Assertion: If the speed of charged particle increases both the mass as well as charge increases.
Reason: If \(m_0=\) rest mass and \(m\) be mass at velocity \(v\) then \(m=\frac{m_0}{\sqrt{1-\frac{v^2}{c^2}}}\)
where \(\mathrm{c}=\) speed of light.

142674 Rest mass energy of electron is \(0.51 \mathrm{MeV}\). If a moving electron has a kinetic energy of 9.69 \(\mathrm{MeV}\), then the ratio of the mass of the moving electron to its rest mass will be.

142663 A monochromatic light of frequency \(3 \times 10^{14}\) \(\mathrm{Hz}\) is produced by a LASER, emits the power of \(3 \times 10^{-3} \mathrm{~W}\). Find how many number of photons are emitted per second.

142666 An electron and proton are produced by breaking of a neutron. If the mass of neutron. electron and proton are \(1.675 \times 10^{-27} \mathrm{~kg}\), \(9 \times 10^{-31} \mathrm{~kg}\) and \(1.6730 \times 10^{-27} \mathrm{~kg}\) respectively, find the amount of energy released in this process.
(consider velocity of light as \(3 \times 10^8 \mathrm{~m} / \mathrm{s}\) )

142671 Assertion: If the speed of charged particle increases both the mass as well as charge increases.
Reason: If \(m_0=\) rest mass and \(m\) be mass at velocity \(v\) then \(m=\frac{m_0}{\sqrt{1-\frac{v^2}{c^2}}}\)
where \(\mathrm{c}=\) speed of light.

142674 Rest mass energy of electron is \(0.51 \mathrm{MeV}\). If a moving electron has a kinetic energy of 9.69 \(\mathrm{MeV}\), then the ratio of the mass of the moving electron to its rest mass will be.

142663 A monochromatic light of frequency \(3 \times 10^{14}\) \(\mathrm{Hz}\) is produced by a LASER, emits the power of \(3 \times 10^{-3} \mathrm{~W}\). Find how many number of photons are emitted per second.

142666 An electron and proton are produced by breaking of a neutron. If the mass of neutron. electron and proton are \(1.675 \times 10^{-27} \mathrm{~kg}\), \(9 \times 10^{-31} \mathrm{~kg}\) and \(1.6730 \times 10^{-27} \mathrm{~kg}\) respectively, find the amount of energy released in this process.
(consider velocity of light as \(3 \times 10^8 \mathrm{~m} / \mathrm{s}\) )

142671 Assertion: If the speed of charged particle increases both the mass as well as charge increases.
Reason: If \(m_0=\) rest mass and \(m\) be mass at velocity \(v\) then \(m=\frac{m_0}{\sqrt{1-\frac{v^2}{c^2}}}\)
where \(\mathrm{c}=\) speed of light.

142674 Rest mass energy of electron is \(0.51 \mathrm{MeV}\). If a moving electron has a kinetic energy of 9.69 \(\mathrm{MeV}\), then the ratio of the mass of the moving electron to its rest mass will be.