145750 In X-ray tube the potential difference between the anode and the cathode is $20 \mathrm{kV}$ and the current flowing is $1.6 \mathrm{~mA}$. The number of electrons striking teh anode in $1 \mathrm{~s}$ is $\left(\right.$ Charge of an electron $\left.=1.6 \times 10^{-19} \mathrm{C}\right)$

145752 The energy (in $\mathrm{eV}$ ) required to excite an electron from $n=2$ to $n=4$ state in hydrogen atom is :

145753 Assertion: Between any two given energy levels. The number of absorption transitions is always less then the number of emission transitions.
Reason: Absorption transitions start from the lowest energy level only and may end at any higher energy level. But emission transitions may start from any higher energy level and end at any energy level below it.

145755 Consider the spectral line resulting from the transition $n=2, n=1$ in the atoms and ions given below. The shortest wavelength in it is produced by

145756 What is the energy of photon whose wavelength is $6840 \AA$ ?

145750 In X-ray tube the potential difference between the anode and the cathode is $20 \mathrm{kV}$ and the current flowing is $1.6 \mathrm{~mA}$. The number of electrons striking teh anode in $1 \mathrm{~s}$ is $\left(\right.$ Charge of an electron $\left.=1.6 \times 10^{-19} \mathrm{C}\right)$

145752 The energy (in $\mathrm{eV}$ ) required to excite an electron from $n=2$ to $n=4$ state in hydrogen atom is :

145753 Assertion: Between any two given energy levels. The number of absorption transitions is always less then the number of emission transitions.
Reason: Absorption transitions start from the lowest energy level only and may end at any higher energy level. But emission transitions may start from any higher energy level and end at any energy level below it.

145755 Consider the spectral line resulting from the transition $n=2, n=1$ in the atoms and ions given below. The shortest wavelength in it is produced by

145756 What is the energy of photon whose wavelength is $6840 \AA$ ?

145750 In X-ray tube the potential difference between the anode and the cathode is $20 \mathrm{kV}$ and the current flowing is $1.6 \mathrm{~mA}$. The number of electrons striking teh anode in $1 \mathrm{~s}$ is $\left(\right.$ Charge of an electron $\left.=1.6 \times 10^{-19} \mathrm{C}\right)$

145752 The energy (in $\mathrm{eV}$ ) required to excite an electron from $n=2$ to $n=4$ state in hydrogen atom is :

145753 Assertion: Between any two given energy levels. The number of absorption transitions is always less then the number of emission transitions.
Reason: Absorption transitions start from the lowest energy level only and may end at any higher energy level. But emission transitions may start from any higher energy level and end at any energy level below it.

145755 Consider the spectral line resulting from the transition $n=2, n=1$ in the atoms and ions given below. The shortest wavelength in it is produced by

145756 What is the energy of photon whose wavelength is $6840 \AA$ ?

145750 In X-ray tube the potential difference between the anode and the cathode is $20 \mathrm{kV}$ and the current flowing is $1.6 \mathrm{~mA}$. The number of electrons striking teh anode in $1 \mathrm{~s}$ is $\left(\right.$ Charge of an electron $\left.=1.6 \times 10^{-19} \mathrm{C}\right)$

145752 The energy (in $\mathrm{eV}$ ) required to excite an electron from $n=2$ to $n=4$ state in hydrogen atom is :

145753 Assertion: Between any two given energy levels. The number of absorption transitions is always less then the number of emission transitions.
Reason: Absorption transitions start from the lowest energy level only and may end at any higher energy level. But emission transitions may start from any higher energy level and end at any energy level below it.

145755 Consider the spectral line resulting from the transition $n=2, n=1$ in the atoms and ions given below. The shortest wavelength in it is produced by

145756 What is the energy of photon whose wavelength is $6840 \AA$ ?

145750 In X-ray tube the potential difference between the anode and the cathode is $20 \mathrm{kV}$ and the current flowing is $1.6 \mathrm{~mA}$. The number of electrons striking teh anode in $1 \mathrm{~s}$ is $\left(\right.$ Charge of an electron $\left.=1.6 \times 10^{-19} \mathrm{C}\right)$

145752 The energy (in $\mathrm{eV}$ ) required to excite an electron from $n=2$ to $n=4$ state in hydrogen atom is :

145753 Assertion: Between any two given energy levels. The number of absorption transitions is always less then the number of emission transitions.
Reason: Absorption transitions start from the lowest energy level only and may end at any higher energy level. But emission transitions may start from any higher energy level and end at any energy level below it.

145755 Consider the spectral line resulting from the transition $n=2, n=1$ in the atoms and ions given below. The shortest wavelength in it is produced by

145756 What is the energy of photon whose wavelength is $6840 \AA$ ?