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

More "M.C.Q (1 Marks)" from 13. Nuclei→13. Nuclei — all question types→Physics STD 12 Science question papers→CBSE Board STD 12 Science question papers→CBSE Board question paper generator→

Similar questions

The amount of force exerted on a unit positive charge in an electric field is known as $........$?

The formation of depletion region in a p-n junction diode is due to

Two parallel wires of length $9 m$ each are separated by a distance $0.15 m$. If they carry equal currents in the same direction and exerts a total force of $30 \times 10^{-7} N$ on each other, then the value of current must be

If two bodies $A$ and $B (A$ bigger in size than $B)$ are rubbed together, then:

A heater coil is cut into two equal parts and only one part is now used in the heater. The heat generated will now be

In amplitude modulation, sinusoidal carrier frequency used is denoted by ${\omega _c}$ and the signal frequency is denoted by ${\omega _m}$ The bandwidth ($\Delta {\omega _m}$) of the signal is such that $\Delta {\omega _m}$ $< <$ ${\omega _c}$ . Which of the following frequencies is not contained in the modulated wave ?

Two conducting circular loops of radii $R_{1}$ and $\mathrm{R}_{2}$ are placed in the same plane with their centres coinciding. If $R_{1}>>R_{2}$, the mutual inductance $M$ between them will be directly proportional to:

Artificial radioactivity was discovered by:

A coil in the shape of an equilateral triangle of side $l$ is suspended between the pole pieces of a permanent magnet such that $\vec {B}$ is in plane of the coil. If due to a current $i$ in the triangle a torque $\tau$ acts on it, the side $l$ of the triangle is

The interior of a conductor can have no excess $........$ in the static situation.