Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Q. How is the electron beam focused to a fine spot on the face of the CRT?
Sol. The functional diagram of an electrostatic focusing arrangement is shown below. The pre-accelerating anode, which is a metal cylinder containing many baffles, collimates the electron beam which enters it through a small opening on the left hand side. The pre-accelerating anode is connected to a high positive potential.
The focusing anode and the accelerating anodes are co-axial with the pre-accelerating anode. The pre-accelerating and accelerating anodes are connected to the same potential while the focusing anode is connected to a lower potential.
On account of difference of potential between focusing anode and the two focusing anode. The equipotential surfaces thus form a "double concave".
The electron beams entering the field at angles other than the normal to the equipotential surfaces, will be deflected towards the normal and the beam is thus focused towards the centre of the tube axis. By changing the voltage of the focusing anode, the refractive index of the electron lens is changed and therefore the focal point of the beam can be changed. The change in voltage is brought about by chanting the setting of potentiometer. This control is brought to the front panel of CRO and is marked focus.
state seven main requirement for insulators
Current ratio The ratio is mainly used to give an idea of the company's ability to pay back its short-term liabilities with its short-term assets. The higher the current ratio
Q. Show Capital asset pricing model? This model was developed by the William F Sharpe ( 1990 Nobel prize winner in the economy ) and john linter in 1960. The model attempt to c
Importance: The transistor is the main active component in practically all current electronics, and is considered through many to be one of the greatest inventions of the 20 t
Questions: a) One common characteristic of Embedded Systems is that they need to be dependable. Name and describe any three aspects which encompass dependability. b) Name
Logistical management - Gis applications: Using GIS also allows a radical improvement in daily work management practices - such as planning new installations, scheduling opera
a. Describe what you understand by 'offset voltage' and 'offset current' of op-amp. Discuss with a neat circuit diagram the method used for minimizing offset voltage and offset cu
Explain the NAND Gates - Microprocessor? The NAND GATE is a AND gate with the output inverted. Consequently the outputs of a NAND gate would be the opposites of the outputs of a A
What is AGP? AGP: The latest addition for many computer systems is the inclusion of the accelerated graphics port. This AGP operates at the bus clock frequency of the microproc
can i use the direct solar energy from solar plate to charge my laptop without a battery
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd