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Why are electrons in a cathode ray tube deflected by magnetic and electric fields?
Wiki User
∙ 12y ago
By nature electrons are charged particles (with a -1 charge). Also there's an established relationship between electricity, which involves the flow of electrons, and magnetism, known as electromagnetism. Ampere's right-hand rule suggests the magnetic field moves in a corkscrew direction perpendicularly in reference to the direction of the flow of electrons (electrical current).
Wiki User
∙ 8y ago
Wiki User
∙ 9y agoYou can conclude that the cathode ray is composed of negatively charged particles. This experiment was conducted by William Crookes, and he concluded just that.
Wiki User
∙ 11y agoWiki User
∙ 12y agoBecause the Electrons have a negative charge
Wiki User
∙ 9y agoCathode rays are charges particles (electrons) and as such are affected by magnetic fields.
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A cathode ray produced in a gas-filled tube is deflected by a magnetic field A wire carrying an electric current can be pulled by a magnetic field A cathode ray is deflected away from a negatively?
They are negatively charged
What did Thomson conclude about the particles in cathode rays?
they are deflected toward positive terminal in an electric field
Why did Thomson think that atom must contain positive charges?
The cathode rays were deflected.
Why flow of current from cathode to anode still the flow of electrons is from cathode to anode?
The direction of current, according to convention, is the direction opposite the direction of electron flow. Remember that the anode is where oxidation occurs, so electrons are lost by the anode. These electrons then move from the anode, to the cathode by a wire that usually connects the two compartments. To reiterate, the electrons flow from the anode (site of oxidation) to the cathode (site of reduction). Because electrons flow from anode to cathode, by convention the direction of current is from cathode to anode (the direction opposite the flow of electrons). Hope this helps!
What was a beam of electrons first called?
a beam of electrons was first called a cathode ray.
A cathode ray produced in a gas-filled tube is deflected by a magnetic field A wire carrying an electric current can be pulled by a magnetic field A cathode ray is deflected away from a negatively?
They are negatively charged
How did thomas discover the electron?
J. J. Thomson discovered the electron using an experiment involving cathode rays and a magnetic field. When subjected to the magnetic field, the cathode ray was deflected. If the magnetic field was flipped, the cathode ray was deflected in the opposite direction. This proved that a cathode ray was a stream of negatively charged particles that would later be deemed electrons.
How magnetic field is related with cathode rays in physics?
When a magnetic field is applied to a cathode ray, the cathode ray is deflected.
How did JJ Thompson demonstrate the existence of the electron?
J. J. Thomson discovered the electron using an experiment involving cathode rays and a magnetic field. When subjected to the magnetic field, the cathode ray was deflected. If the magnetic field was flipped, the cathode ray was deflected in the opposite direction. This proved that a cathode ray was a stream of negatively charged particles that would later be deemed electrons.
Which scientist used the cathode ray tube to isolate the electron in 1897?
J.J. Thomson used the cathode ray. Thomson's cathode ray experiment was when he shot a narrow beam of electrons through a cylindrical tube and deflected the electrons off of electric and magnetic fields, thus measuring the effects that those fields had on the direction of the beam.
How did JJ Thomson know that the particles in the cathode-ray tube were negatively charged?
They are found to be deflected by electric and magnetic field in the specific direction in which a negatively charged particle would get deflected.
Are cathode rays deflected toward a negatively charged plate in an electric field?
Yes. Cathode rays, otherwise known as electrons, are repelled by a negative charge, and attracted to a positive charge.
What is the effect of electric field on cathode rays?
A cathode ray is nothing but a stream of negatively charged electrons. If electrons are moving through an electric or a magnetic field, they will be deflected.In the case of an electric field, the cathode ray would be deflected toward a positive plate and/or away from a negative plate. This follows the fundamental principle of electrostatics wherein opposite charges attract and like charges repel. In the case of a magnetic field, we have to apply Fleming's left hand rule to know about the direction of deflection of cathode ray. Note that the electrons must move across the magnetic lines of force, and not along them for the field to act on the moving charges and deflect them.
What did john Thomson use to deflect the cathode rays?
he dint did nething to deflect them thet went straight to the anode +ve of the tube becoz opposite attracts.
What did Thomson conclude about the particles in cathode rays?
they are deflected toward positive terminal in an electric field
What evidence convinced Thomson that cathode rays consist of negatively charged particles?
In a series of experiments in the 1890's, J.J.Thompson showed that cathode rays, or electrons, are deflected by an electric field, they are bent by a magnetic field, and that their charge to mass ratio is about 1/2000th of that of the proton. Light does not have any of these properties.
What exert the force that causes other electric charges to move?
Consider the stream of electrons travelling in an old Cathode Ray Tube CRT. These may be displaced by both magnetic and electric fields.
