Quiz[ Dev Hooda ]

A gama ray photon is emitted

Half life of radioactive element X is the same as the mean Lifetime of another radioactive element y. Initially they have the same number of elements then [HINT😱😱💀]

With increase in biasing voltage of a photodiode , the photocurrent magnitude

If Ro for H like atom is 100 than R for Li++ will be

If Ro = 100 for Hydrogen atom than what will be the radii in orbit n = 2

Radioactive material A has decay constant 8X and material B has decay constant X . Initially they have same number of nuclei . After what time the ratio of number of nuclei of material B to that A will be 1/e

Half life is 100secs the fraction of original activity that will remain active after 150 hrs is

T1/2 is 30 mins time between 40% to 85% decay is

T1/2 of A is 50 secs if initial conc is 2A/3 and it decays to A/3 in time

X converts into stable Y t1/2 = 50 years If in a sample of rock ratio of x: y is 1:15 Than approx age of rock is

The number of Beta particles emitted by a radioactive substance is twice the number of alpha particles emitted by it . The resulting daughter is __ of parent

Alpha particle

Ratio of kinetic energy to Total energy of an e in a Bohr orbit of hydrogen atom

When alpha particle of mass m moving with velocity V bombards on a heavy nucleus of charge Ze distance of closest approach depends on ‘m’ as

In any fission reaction z = mass of product/mass of parent nucleus is

Which of the following pair is of isotones