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The screen is at 2.8 cm from centre of deflecting plates. Find the input voltage required to deflect the beam by 1.5 cm.
written 6.3 years ago by gravatar for neeta.vanage neeta.vanage • 860 modified 2.2 years ago by gravatar for pedsangini276 pedsangini276 • 4.7k

Subject: Applied Physics 2

Topic: Motion Of Charged Paqrticle In Electric And Magnetic Field

Difficulty: Medium


A CRT has anode voltage 1.6 kV & parallel deflection plates are 1.8 cm long & 4.2 mm apart. The screen is at 2.8 cm from centre of deflecting plates. Find the input voltage required to deflect the beam by 1.5 cm.
engineering physics
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written 6.2 years ago by gravatar for neeta.vanage neeta.vanage • 860

$$ $$ $ V_A = 1.6*10^3 V \\ l = 1.8 cm \\ d = 0.42 cm \\ D = 2.8 cm \\ V =? \\ Y=1.5 cm \\ $

$Y = (D l V)/(2 dVA ) \\ 1.5 =(2.8*1.8*V) / (2*0.42*600 ) \\ βΈ« V = 400 V \\ $
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