Advertisements
Advertisements
प्रश्न
Give a scientific explanation.
When the radiation coming out from a certain radioactive substance is passed through an electric field, marks are found at three places on the photographic plate placed in its path.
उत्तर
When the radiation coming out from a certain radioactive substance is passed through an electric field, marks are found at three places on the photographic plate placed in its path. These three marks represent the three kinds of rays which are emitted by the radioactive substances. One type of radiation deviated slightly towards the negatively charged plate and was called alpha rays. The second type of radiation deviated substantially towards the positively charged plate and was called the beta rays. The third type of radiation did not deviate at all and was called the gamma rays.
APPEARS IN
संबंधित प्रश्न
Answer the following questions based on a hot cathode ray tube.
State the approximate voltage used to heat the filament
Answer the following questions based on a hot cathode ray tube.
What will happen to the beam when it passes through the electric field?
Write one use of cathode ray tube.
Represent the change in the nucleus of a radioactive element when a β particle is emitted.
Under which conditions does the nucleus of an atom tend to radioactive?
What happens if the negative potential is changed on a grid?
State any two precautions to be taken while handling radioactive substances
What happens to the mass number of an element when (i) an α -particle, (ii) a β -particle, and (iii) γ -radiation is emitted?
During the emission of a beta particle, the ______ number remains same.
State two characteristics of the substance used as thermionic emitter.
State two properties that a substance should possess when used as a thermionic emitter.
How is a zinc sulphide screen affected when a cathode ray beam strikes it?
In a cathode ray tube state the purpose of the fluorescent screen.
Name a common device where a hot cathode ray tube is used.
A certain nucleus has a mass number 20 and atomic number 9. Find the number of neutrons and protons present in it.
Two radioactive nuclei are represented by xAp and yAq and when p and q are mass numbers and x, y are the atomic number. How can the products be represented, i .e., what are the new values of p, q. x and y after the emission of an α-particle and a β-particle from A and B respectively.
State one use of radio-isotopes.
Two radioactive sources A and B of half lives of 1 hour and 2 hours, respectively, initially contain the same number of radioactive atoms. At the end of two hours, their rates of disintegration are in the ratio of ______.
Calculate the time interval between 33% decay and 67% decay if half-life of a substance is 20 minutes.
