Alpha particles are - Vidyadip

MCQ

Alpha particles are

A
$2$ free protons
✓
doubly ionised helium atoms
C
helium atoms
D
singly ionised helium atoms

✓

Answer

Correct option: B.

doubly ionised helium atoms

b

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

NEET STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

Indicate which one of the following system is digital

If $ m$ is magnetic moment and $B$ is the magnetic field, then the torque is given by

The current sensitivity of a moving coil galvanometer increases by $20 \%$ when its resistance is doubled. Calculate, by what factor does the voltage sensitivity change?

A nucleus of mass $M + \Delta m$ is at rest and decays into two daughter nuclei of mass $ \frac {M}{4}$&$\frac{3M}{4}$ each. Speed of light is $c.$ The speed of daughter nucleus of mass $\frac{M}{4}$ is

If Rydberg's constant is $R$, the longest wavelength of radiation in Paschen series will be $\frac{\alpha}{7 R}$, where $\alpha=$____________

Five molecules of a gas are having speeds $1,2,4,8$ and $16\,m/s$ at some instant. The root mean square velocity of the gas molecules is ..... $m/s$

A bungee jumper is jumping with help of elastic ideal rope (Force constant $K$). Jumper steps off the bridge and falls from the rest towards the river below. He does not hit the water. The mass of jumper is $m$, natural length of rope is $l$. Gravity is $g$, assume every thing ideal. then, choose the incorrect option

The cyclotron frequency of an electron gyrating in a magnetic field of $1\, T$ is approximately

The displacement-time graph for two particles $A$ and $B$ are straight lines inclined at angles of ${30^o}$ and ${60^o}$ with the time axis. The ratio of velocities of ${V_A}:{V_B}$ is

Two astronauts are floating in gravitational free space after having lost contact with their spaceship. The two will