BCECE SERIES Physics
Atoms
2 previous year questions.
Volume: 2 Ques
Yield: Medium
High-Yield Trend
1
2017 1
2003 Chapter Questions 2 MCQs
01
PYQ 2003
medium
physics ID: bcece-20
In hydrogen atom when an electron jumps from second to first orbit, the wavelength of line emitted is :
1
$0.563\, ??
2
$4861\, ??
3
$4102\ ??
4
$1213\, ??
02
PYQ 2017
medium
physics ID: bcece-20
The half life period of a radioactive element X is same as the mean life time of another radioactive element Y. Initially they have the same number of atoms. Then
1
X and Y decay at same rate always
2
X will decay faster than Y
3
Y will decay faster than X
4
X and Y have same decay rate initially