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प्रश्न
How is a cathode ray tube used to convert an electrical signal into a visual signal?
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उत्तर
In a CRT, the external P.D. refers to the electrical signal. The P.D. controls the deflection of electrons beam which strikes in the desired fashion direction and converts the electrical signal to visual signal.
संबंधित प्रश्न
Radiations given out from a source when subjected to an electric field in a direction perpendicular to their path are shown below in the diagram. The arrows show the path of the radiation A, B and C. Answer the following questions in terms of A, B and C.
1) Name the radiation B which is unaffected by the electrostatic field.
2) Why does the radiation C deflect more than A?
3) Which among the three causes the least biological damage externally.
4) Name the radiation which is used in carbon dating.
When is said to be the nucleus unstable?
Give the relative ionizing power of α, β and γ radiations.
A radioactive source emits three types of radiations.
Name the radiation which has the highest ionizing power.
State three safety precautions that you would take while handling the radioactive substances.
State two characteristics of the substance used as thermionic emitter.
What is meant by Radioactivity?
An electrons emitter must have how much work function and melting point.
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)
