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Worksheetscathode ray
Total questions: 30
Worksheet time: 30mins
What is cathode ray?
laser
fast moving electrons
electromagnetic wave
beta particles
When electrons are released from hot metal surface, it is known as..
thermodynamic emission
thermometric emission
thermionic emission
The speed of cathode ray is affected by..
potential difference of anode
potential difference of cathode
resistance of cathode
resistance of filment
The amount of electron emission is affected by the followings except...
density of cathode
type of material of cathode
surface area of cathode
temperature of cathode
Cathode ray can be deflected by....
electric field
magnetic field
both electric & magnetic field
none of the above
Which particle escapes from the surface of the metal when it is heated at a high temperature?
Proton
Neutron
Nucleon
Electron
Which particle is cathode ray?
Electron beam
Gamma ray
Neutron
Alpha particles
Why do the electrons travel quickly through the tube?
Because the electric field anode accelerates them
Because they are repelled from the hot filament
Because they are repelled from each other
Because they are magnetically attracted to the fluorescent screen
Because electrons always move quickly because of quantum stuff
Particles emitted from a hot cathode surface are:
negative ions
photon
protons
electrons
Cathode rays carry
negative charge
positvie charge
neutral particles
electrons and protons
How are the electrons made into a beam?
Using a high voltage across the tube.
Use of an anode to spread the electrons.
Use of positive anode to focus the electrons.
Use of a fluorescent coating at the end of the tube.
How is the electron beam detected?
Use of a fluorescent screen.
By deflecting the beam of electrons with a magnetic field.
By deflecting the beam of electrons with an electric field.
Using an electron microscope.
what happens when cathode rays strike the fluorescent screen
electron bounces back
nothing happens
emit light
produce current
how to increase the rate of thermionic emission
immerse metal in an electrolyte
increase the surrounding pressure
decrease the temperature of metal to stabilize electron
increase the surface area of the metal
what happen to the electron when when it is emitted from the cathode or metal?
move around the cathode
attract toward the anode
attract toward the cathode
goes back to cathode to form equilibrium state
Why must the glass tube be in a vacuum state?
Mengapakah tiub kaca berada dalam keadaan vakum?
To avoid a reaction to happen inside the glass tube
Untuk mengelakkan tindak balas berlaku dalam tiub kaca
To ensure the electrons wouldn’t collide with air molecules
Untuk memastikan elektron tidak berlanggar dengan molekul-molekul udara
To reduce the pressure inside of the glass tube
Untuk mengurangkan tekanan dalam tiub kaca
To ensure the electron emission is controlled
Untuk memastikan pancaran elektron terkawal
“The emission of free electrons from a heated metal surface.” The following is the definition of
“Pemancaran elektron bebas daripada permukaan logam yang dipanaskan.” Berikut adalah definisi bagi
Thermionic emission
Pancaran termion
Ionic emission
Pancaran ion
Cathode ray
Sinar katod
Maltese ray
Sinar Maltese
_______ is a high velocity electron beam.
_______ adalah sesuatu alur elektron yang berkelajuan tinggi.
Ionic emission
Pancaran ion
Thermionic emission
Pancaran termion
Maltese ray
Sinar Maltese
Cathode ray
Sinar katod
What would happen if the connection to the E.H.T power supply is reversed?
Apakah yang akan berlaku jika sambungan ke bekalan kuasa V.L.T disongsangkan?
The cathode ray’s velocity will be increased
Kelajuan sinar katod akan bertambah
Cathode ray will be polarized
Sinar katod akan dikutubkan
The milliammeter will not show any readings
Miliammeter tidak akan menunjukkan bacaan
The milliammeter’s needle will deflect
Jarum miliammeter akan terpesong
What are the traits of a cathode ray?
Apakah ciri-ciri bagi sinar katod?
Travels in a straight line
Bergerak dalam garis lurus
Positively charged
Bercas positif
Negatively charged
Bercas negatif
Has mass
Mempunyai jisim
Possesses momentum and kinetic energy
Mempunyai momentum dan tenaga kinetik
What rule is used to determine the direction of deflection of the cathode ray in magnetic field as in the diagram?
Apakah petua yang digunakan untuk menentukan arah pesongan sinar katod di dalam medan magnet seperti yang di dalam rajah ini?
Fleming' left hand rule
Petua tangan kiri Fleming
Fleming' right hand rule
Petua tangan kanan Fleming
right hand grip rule
petua gengaman tangan kanan
in cathode ray tube, the fluorescent screen glowing when cathode ray hit it. This implies that cathode ray:
Di dalam tiub sinar katod, skrin berpendarflour bercahaya apabila sinar katod mengenainya.Ini menunjukkan bahawa sinar katod:
moves in straight line
bergerak lurus
negatively charge
bercas negatif
has momentum and kinetics energy
mempunyai momentum dan tenaga kinetik
highly velocity
berkelajuan tinggi
The temperature required to release the electrons will be reduced if
layer of metal coated with barium oxide
layer of metal coated with aluminium oxide
use copper wire
layer of metal coated with strontium oxide
If an electric field is put across the beam with the positive plate on top and the negative plate below.
The beam will bend
Up
down
left
right
in a circle
I use thermionic emission to emit a stream of electrons and display them on a screen.
Cathode-Ray Oscilloscope
Raster-Scan Display
Random-Scan Display
Which are all uses of cathode ray tubes?
Oscilloscope.
old style TV pre 2000
old computer monitors pre 2000
all of the above
what can be used to control the direction of the cathode ray
electrical field
gravitational field
heat energy
quantum field
Diagram shows two magnets with opposite poles are placed at the sides of the tube causing the shadow being deflected. The direction of the deflection is determined using
Rajah menunjukkan dua batang magnet dengan kutub berlawanan diletakkan di sisi tiub tersebut menyebabkan bayang itu terpesong. Arah pesongan itu ditentukan dengan menggunakan
the right hand grip rule
petua genggaman tangan kanan
the left hand grip rule
petua genggaman tangan kiri
the Fleming's right hand rule
petua tangan kanan Fleming
the Fleming's left hand rule
petua tangan kiri Fleming
Diagram below shows an audio signal generator connected to a cathode ray oscilloscope, CRO.
Which signal shows the loudest and the highest pitched audio signal?
Cathode rays carry
negative charge
positvie charge
neutral particles
electrons and protons
