The de Broglie wavelengths for an electron and a photon are $$\lambda$$_e and $$\lambda$$_p respectively. For the same kinetic energy of electron and photon, which of the following presents the correct relation between the de Broglie wavelengths of two ?

The Q-value of a nuclear reaction and kinetic energy of the projectile particle, K_p are related as :

For using a multimeter to identify diode from electrical components, choose the correct statement out of the following about the diode :

The velocity of sound in a gas, in which two wavelengths 4.08 m and 4.16 m produce 40 beats in 12s, will be :