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What is thermionic emission?
Which of the following is not the factor that affects the rate of thermionic emission?
Which of the following is true about cathode ray?
Which of the following diagram shows the correct movement of a cathode ray when it approaches a charged sphere?
The figure shows an electron is passing through a magnetic field. Which of the following statement is TRUE about the movement of the electron?
Label P, Q, R and S of the thermionic diode in the figure.
P
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Q
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R
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S
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Figure above shows an image on the screen of a Maltese Cross Tube. If a bar magnet is brought close to the Maltese Cross Tube as shown in the figure. What will be the possible new position of the image?
Figure above shows a moving charge particle is deflected in an electric field. The angle of deflection is affected by