Physics Modern Physics questions from JEE Main 2002.
Sodium and copper have work functions $2.3 \mathrm{eV}$ and $4.5 \mathrm{eV}$ respectively. Then the ratio of the wave lengths is nearest to
At absolute zero, Si acts as
The energy band gap is maximum in
If mass-energy equivalence is taken into account, when water is cooled to form ice, the mass of water should
If $13.6 \mathrm{eV}$ energy is required to ionize the hydrogen atom, then the energy required to remove an electron from $n=2$ is
Formation of covalent bonds in compounds exhibits