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Answer the Following Questions Based on a Hot Cathode Ray Tube. What Will Happen to the Beam When It Passes Through the Electric Field? - Physics

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प्रश्न

Answer the following questions based on a hot cathode ray tube.

What will happen to the beam when it passes through the electric field?

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उत्तर

When an electric field is produced between the two plates, the electron beam on entering the space between the plates gets deflected towards the positive plate. Because the electric field is normal to the direction of motion of electrons, electrons of the beam follow a parabolic path.

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2016-2017 (March) Set 1

संबंधित प्रश्न

Name the radiations which are absorbed by greenhouse gases in the earth’s atmosphere.


Name a gas caused by the Greenhouse effect


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.


What happens to the atomic number of element when (i) An α -particle, (ii) A β -particle 1 and (iii)  γ-radiation is emitted?


The mass number (A) of an element is not changed when it emits ______________.

Why are materials of low work function preferred as thermionic cathode materials?


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.


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 ______.


Assertion (A): The force of repulsion between atomic nucleus and α-particle varies with distance according to inverse square law.

Reason (R): Rutherford did α-particles scattering experiment.


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