Question
Define the ionisation energy. What is the value of it for hydrogen atom?
✓
Answer
Ionisation Energy : In any atom, that minimum energy of electron given to it for transition, so that it go out from the atom, this required energy is called ionisation energy. Ionisation energy of hydrogen atom is 13.6 eV .
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
The charge on a proton is $+1.6 \times 10^{-19}C$ and that on an electron is $-1.6 \times 10^{-19}C.$ Does it mean that the electron has a charge $3.2 \times 10^{-19}C$ less than the charge of a proton?
→Explain the refraction by two transparent spherically curved surface.
Protons with kinetic energy K emerge from an accelerator as a narrow beam. The beam is bent by a perpendicular magnetic field, so that it just misses a plane target kept at a distance l in front of the accelerator. Find the magnetic field.
A point source is placed at a depth h below the surface of water (refractive index = μ).
- Show that light escapes through a circular area on the water surface with its centre directly above the point source.
- Find the angle subtended by a radius of the area on the source.
Figure shows a conducting circular loop of radius a placed in a uniform, perpendicular magnetic field B. A thick metal rod OA is pivoted at the centre O. The other end of the rod touches the loop at A. The centre O and a fixed point C on the loop are connected by a wire OC of resistance R. A force is applied at the middle point of the rod OA perpendicularly, so that the rod rotates clockwise at a uniform angular velocity $\omega.$ Find the force.
→Explain the principle of working of a meter bridge. Draw the circuit diagram for determination of an unknown resistance using it.
$a$. An electron moving horizontally with a velocity of $4 \times 10^4 m / s$ enters a region of uniform magnetic field of $10^{-5} T$ acting vertically upward as shown in the figure. Draw its trajectory and find out the time it takes to
$b$. A straight wire of mass $200 g $and length $1.5\ m$ carries a current of $2 A$. It is suspended in mid air by a uniform magnetic field $B$. What is the magnitude of the magnetic field?
→$b$. A straight wire of mass $200 g $and length $1.5\ m$ carries a current of $2 A$. It is suspended in mid air by a uniform magnetic field $B$. What is the magnitude of the magnetic field?
State the conclusion of experiments about Iriction charge.
A tuning fork of frequency 256Hz produces 4 beats per second with a wire of length 25cm vibrating in its fundamental mode. The beat frequency decreases when the length is slightly shortened. What could be the minimum length by which the wire be shortened so that it produces no beats with the tuning fork?
Is it necessary for the plane of the orbit of a satellite to pass through the centre of the earth?