A set of atoms in an excited state decay. - Vidyadip

MCQ

A set of atoms in an excited state decay.

✓
In general, to any of the states with lower energy.
B
Into a lower state only when excited by an external electric field.
C
All together simultaneously into a lower state.
D
To emit photons only when they collide.

✓

Answer

Correct option: A.

In general, to any of the states with lower energy.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (1 Marks)" from Atoms→Atoms — all question types→Physics STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

In the diagram, three point charges $($labeled $1, 2$ and $3)$ are shown, along with the electric field around them. Which charge$(s)$ is/ are positive?

The coefficient of self inductance of a solenoid is 0.18 mH. If a crode of soft iron of relative permeability 900 is inserted, then the coefficient of self inductance will become nearly

Assertion : Two P-N junction diodes placed back to back, will work as a NPN transistor.
Reason : The P-region of two PN junction diodes back to back will form the base of NPN transistor.

Figure shows a rod ${AB}$, which is bent in a $120^{\circ}$ circular arc of radius $R$. A charge $(-Q)$ is uniformly distributed over rod ${AB}$. What is the electric field $\overrightarrow{{E}}$ at the centre of curvature ${O}$ ?

In cyclotron the resonance condition is:

The current flowing in a coil of self inductance $0.4 \,mH$ is increased by $250 \,mA$ in $0.1\,sec$. The $e.m.f$. induced will be

A wire of resistance $4 \,\Omega$ is stretched to twice its original length. The resistance of stretched wire would be ........... $\Omega$

A long, hollow conducting cylinder is kept coaxially inside another long, hollow conducting cylinder of larger radius. Both the cylinders are initially electrically Neutral.

A beam of electron is used in an YDSE experiment. The slit width is $d$. When the velocity of electron is increased, then

Assertion : $NAND$ or $NOR$ gates are called digital building blocks.

Reason : The repeated use of $NAND$ (or $NOR$) gates can produce all the basis or complicated gates.