Physics II Lab w answers_Part_20

Physics II Lab w answers_Part_20 - used in a CRT? Estimate...

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51 used in a CRT? Estimate the velocity ‘v o ’ of the electron. 2. What will happen to the spot if a sinusoidally time varying voltage is applied to the deflecting plates VV / or HH / ? What will happen if such a voltage (of the same frequency) is applied simultaneously to the horizontal and vertical deflecting plates? 3. Draw a neat diagram showing the 3-dimensional orientations of vectors of the electron’s horizontal velocity, the electric field, the magnetic field the electric force on the electron and the magnetic force as the electron moves in the CRT. Orient your diagram according to the experimental set-up. 4. If the deflecting voltage is switched off but the bar magnets kept in place, will there be a deflection of the spot? Describe qualitatively the motion of the electron in the CRT from aperture to screen. 5. Describe the motion of the electron in the CRT in the presence of the deflecting voltage magnetic fields of the magnets 6. What is the effect of earth’s magnetic field on the electron motion? What would happen if the apparatus were rotated by 90 0 so that the CRT is along the EW direction? 7. Consider a dipole aligned with a magnetic field .If the dipole is given a small angular displacement, then it experiences a restoring torque ‘
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This note was uploaded on 11/26/2011 for the course PHY 2053 taught by Professor Lind during the Fall '09 term at FSU.

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Physics II Lab w answers_Part_20 - used in a CRT? Estimate...

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