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Television picture tubes are :...

Television picture tubes are :

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An electron in a television picture tube travels at 3xx10^(7) m/s. It is subjected to a transverse magnetic field of 2xx10^(-3)Wb//m^(2). What is the magnitude of the lateral foce acting on the electron, due to the action of the magnetic field ? Charge on the electron =-1.6 xx10^(-19) C.

Assertion : An electric field is preferred in comparison to magnetic field for detecting the electron beam in a television picture tube. Reason : Electric field require low voltage.

Assertion : An electric field is preferred in comparison to magnetic field for detecting the electron beam in a television picture tube. Reason : Electric field require low voltage.

In a television, the picture signals are ____________ modulated.