c 3 2x10 8 eV d 3 3x10 8 eV 3 Find the energy of photon in

5 A proton and deuteron are accelerated by same potential difference and enter in region of uniform electric field in direction perpendicular to it The deflection of proton is 1 Equal to deflection of deuteron 2 More than deflection of deuteron 3 Less than deflection of deuteron 4 May be more or less than deflection of

P 2 3 60 Consider a hydrogen like ionized atom with atomic number Z with a single electron In the emission spectrum of this atom the photon emitted in the n 2 to n 1 transition has energy 74 8 eV higher than the photon emitted in the n 3 to n 2 transition The ionization energy of the hydrogen atom is 13 6 eV The value of Z is JEE Advanced 2018 P 2 3 601

5 AL The group velocity of the de Broglie wave packet associated with a particle moving with velocity v is 1 equal to v 2 less than v 3 greater than v 4 equal to speed of light

Carbon silicon and germanium atoms have four valence electrons each Their valence and conduction bands are separated by energy band gaps represented by Eg c Eg si and Eg Ge respectively Which of the following relationships is true in their case 1 E F 2 E E

18 A subatomic particle of mass 10 ug is in thermal equilibrium with its surrounding at a temperature of 400 K Then the wave length of this particle will be

50 When the electron of a hydrogen like atom jumps from a higher energy level to a lower energy level then 1 Angular momentum of the electron remains constant 2 Kinetic energy of the electron increases 3 Wavelength of de Broglie wave associated with motion of the electron increases 1 4 Potential oporgy increases X

146 Light of uniform intensity impinges perpendicularly on a totally reflecting surface If the area of the surface is halved the radiation force on it will become double a a b half c four times d one fourth

6 Ionization potential of hydrogen atom is 13 6 el Hydrogen atom in ground state is excited by monochromatic light of energy 12 1 eV The spectra lines emitted by hydrogen according to Bohr s theory will be a one c three 2016 b two d four AIIMS

Q 6 Two H atoms in the ground state collide inelastically The maximu amount by which their combined kinetic energy is reduced is d 27 2 eV a 10 20 eV b 20 40 eV c 13 6 eV

A radiation of energy E falls normally on a perfectly reflecting surface The momentum transferred to the surface is C Velocity of light 1 3 2E C E 2 4 2E