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Why does SCR turn ON by gate current?
to make the revers biased p-n junction in SCR to be conducting.when we apply gate signal across gate and cathode it establish conducting part,thus the current from anode to cathode flow i.e main current.even after we remove the gate signal SCR in conducting mode because now this conducting path is maintain by main current i.e current from anode to cathode
Why does a cathode ray tube have low pressure inside?
Low pressure inside a cathode ray tube? How about nopressure inside the tube! In a cathode ray tube, the "cathode ray" is an electron beam that is used to paint a "picture" on the phosphor coating on the inside of the tube. (We look at the "picture" from the other side of the glass on which the coating is laid down - the outside.) An electron is a lightweight little dude. It weighs about 1/1836th as much as a single proton, so anything, any gas atoms that are in the flight path of an electron will cause it to scatter. That means we need to pump all the air out of the inside of the tube. After we remove all we can, we fire a "getter" (a chemical coated onto a small area inside the tube) which will bind any remaining gas molecules left inside the tube to complete the evacuation process. No more pesky atoms to get in the path of the electron beam and scatter it all over the place.
What path was the summer path for the silk road?
The Silk Road's northern most paths would be the summer path.
Which path did the crazy man take out of the woods?
The pshycho path.
When was The Path of Perfection created?
The Path of Perfection was created in 2002.
How do negatively charged plates affect the path of cathode rays?
Negatively charged plates will attract cathode rays, causing them to bend or deflect towards the plates. The extent of the bending will depend on the strength of the electric field between the plates and the voltage applied across them.
Why Cathode rays travel in straight lines?
Cathode rays travel in straight lines because they are composed of charged particles (electrons) that are negatively charged, and they are repelled by like charges. This repulsion causes the cathode rays to travel in straight paths from the cathode to the anode in a vacuum tube without deviating from their path.
What happens to the path of the cathode ray when the orientation of the magnet is reversed?
When the orientation of the magnet is reversed, the path of the cathode ray will also be reversed. This is because the cathode ray consists of negatively charged particles that are deflected by the magnetic field, so changing the orientation of the magnet will change the direction of the deflection.
Why cathode rays cast a shadow when an object is placed in their path?
Cathode rays are particles with mass and energy, which can be obstructed by solid objects in their path. When an object is placed in the path of cathode rays, the particles are blocked from passing through, creating a shadow on the opposite side of the object. This occurs because the object absorbs or scatters the cathode rays, preventing them from continuing in a straight line.
What detects charged particles by creating a visible path of droplets?
What detects charged particles by creating a visible path of droplets?
How do magnetic fields affect the movement of charged particles?
Magnetic fields can cause charged particles to change direction or move in a curved path. This is because the magnetic field exerts a force on the charged particles, known as the Lorentz force, which influences their movement.
What controls the number of electrons that reach the fluorescent screen in a cathode ray tube A anode B cathod Cdeflecting plate D grid?
I am about to take this exam myself, so maybe I can help both of us with this. The choices are: A.) anode B.) cathode C.) deflecting plates D.) grid The answer starts on page 86 of your study guide, titled "Cathode Ray Tubes". In this illustration, current supplied to the heater causes emission of electrons from the cathode. Those electrons pass toward the anodes through an opening in the control grid. The grid limits the number of electrons that can pass through it, and the anodes cause the electrons passing the grid to a point on the fluorescent screen. Also, two deflecting plates are placed in the path of the beam electrons. When a voltage is applied to these plates, the beam is deflected toward the positively charged plates. If the applied voltage is alternating, the beam moves up and down through its normal central position, and the luminous spot moves on the screen in the same way. Based on this information I have deduced thus... The answer is not A.) anode. Because the anodes job is to pass the electrons the grid allowed through to the point on the fluorescent screen. The answer is not B.) cathode. Because the cathode when heated causes emission of electrons, its purpose is not to limit the number of electrons, just to produce the electrons. The answer is not C.) deflecting plates. Because their job is to use the emitted electrons allowed through the grid to make the projection. So, the answer must be D.) Grid. Because the grid limits the number of electrons that can pass through it! Like I said, I have not taken this exam myself. However, based on the reading material, D just makes sense!
Why do cathode rays produce sharp shadow of object placed in their path?
Cathode rays produce a sharp shadow of an object because they travel in straight lines and can only pass through openings in obstacles. When an object is placed in the path of cathode rays, the rays are blocked by the object, creating a distinct shadow where the rays are unable to pass through. This phenomenon is due to the wave-particle duality of cathode rays.
How do focusing magnetic fields affect the movement of charged particles?
Focusing magnetic fields can control the path of charged particles by bending their trajectory. This is because charged particles experience a force when moving through a magnetic field, causing them to follow a curved path. By adjusting the strength and direction of the magnetic field, scientists can manipulate the movement of charged particles in various applications, such as particle accelerators and magnetic confinement fusion devices.
What is the significance of the cathode ray diagram in understanding the behavior of electrons in a cathode ray tube?
The cathode ray diagram is significant because it shows the path of electrons in a cathode ray tube. By understanding this diagram, scientists were able to discover the behavior of electrons, leading to advancements in technology like television and computer monitors.
What do alpha particles leave charged in their path when they travel through matter?
Charged ions
Function of X plates in cathode ray oscilloscope?
cathode - emits electrons which will become the beamcontrol grid - adjustment of beam current and thus brightness on screenfocus grids - focusing beam to sharp point on screen to form small dotx plates - deflect beam left/righty plates - deflect beam up/downanode - aquadag coating (baked on graphite applied in water suspension) on the inside of the CRT's cone, both accelerates the beam and collects the electrons that rebound from the screenNote: the grids in a CRT are different from the grids in ordinary vacuum tubes: in a CRT the grids are just round holes in metal disks that surround the beam, in ordinary vacuum tubes the grids are actual wire grids in the direct path of electron flow.
