(a.) In a cathode ray tube the electrons are accelerated through a PD of 500V and then pass between deflecting plates which are 0.05m long. (i.) Calculate the time it takes an electron to pass between the plates. (ii.) If the PD across the plates is 10V DC and the plates are 1cm apart, calculate the angle through which the electrons are deflected. (iii.) Explain why the deflection produced by an alternating voltage, applied to the deflecting plates, can be zero at some high frequency.
(a.) In a cathode ray tube the electrons are accelerated through a PD of 500V and then pass between deflecting plates which are 0.05m long. (i.) Calculate the time it takes an electron to pass between the plates. (ii.) If the PD across the plates is 10V DC and the plates are 1cm apart, calculate the angle through which the electrons are deflected. (iii.) Explain why the deflection produced by an alternating voltage, applied to the deflecting plates, can be zero at some high frequency.
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(a.) In a cathode ray tube the electrons are accelerated through a PD of 500V and then pass between deflecting plates which are 0.05m long.
(i.) Calculate the time it takes an electron to pass between the plates.
(ii.) If the PD across the plates is 10V DC and the plates are 1cm apart, calculate the angle through which the electrons are deflected.
(iii.) Explain why the deflection produced by an alternating voltage, applied to the deflecting plates, can be zero at some high frequency.
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