Advertisements
Advertisements
प्रश्न
Write one use of cathode ray tube.
Advertisements
उत्तर
A cathode ray tube is used to investigate the waveform of an unknown alternating potential by applying it on the Y-plates and a known periodic time-base potential on the X-plates
APPEARS IN
संबंधित प्रश्न
What are free electrons?
An element `""_ZS^A` decays to `""_85R^222` after emitting 2 α particles and 1 β particle.
Find the atomic number and atomic mass of the element S.
A radioactive nucleus `""_"Z"^"A"` X first emits a beta particle and then an alpha particle to give the resulting nucleus `""_"Q"^"P"` Y What will be the values of P and Q in terms of A and Z?
Define free electrons.
What do you understand by the term radioactivity?
It is advised not to touch a radioactive substance by hand. Give reason.
A radioactive material decays by simultaneous emissions of two particles with half-lives of 1400 years and 700 years respectively. What will be the time after which one-third of the material remains? (Take In3 = 1.1)
The activity of a certain radionuclide decreases to 15 percent of its original value in 10 days. What is its half life?
[ln (0.15) = -1.9]
Assertion (A): Hydrogen atom consists of only one electron but its emission spectrum has may lines.
Reason (R): Only Lyman series is found in the absorption spectrum of hydrogen atom whereas in the emission spectrum, all the series are found.
