Physics Modern Physics questions from NEET UG 2002.
A deuteron is bombard on ${ }_8 \mathrm{O}^{16}$ nuclei than $\alpha$-particle is emitted then the product nuclei is:
A sample of radioactive element contains $4 \times 10^{16}$ active nuclei. The half-life of the element is 10 decays, then number of decayed nuclei after 30 days is:
For the given circuit of the $p-n$ junction diode which is correct? 
For which logic gate, the given truth table is shown? 
If particles are moving with the same velocity, then the de Broglie wavelength is maximum for:
In a $p-n$ junction:
${ }_{92} \mathrm{U}^{235}$ nucleus absorbs a neutron and disintegrates in ${ }_{54} \mathrm{Xe}^{139},{ }_{38} \mathrm{Sr}^{94}$ and $x$. What will be the product $x$ ?
The value of Planck's constant is:
When ultraviolet rays incident on metal plate then the photoelectric effect does not occur, it occurs by incidence of:
Which of the following are suitable for the process?
Which of the following is not the property of cathode rays?