# >>>> Some questions in physics <<<<?

Question:1> What do you mean by "anode is at a higher potential to cathode" ?

2> What is the derivation of Force = Charge of electron * Intensity

3> How are cathode rays produced ??

4> Define electric field and magnetic induction .

5> Why does a electron travel in a CIRCULAR and not a PARABOLIC path when it passes through magnetic field perpendicular to direction of its velocity ? [ With reference to Thompsons cathode ray experiment ]

6> What do you mean when you say cathode is given increasing -ve potentials ??

Hope you WILL help me ...

Thank you VERY VERY much in advance :O)

1) This basically means that the electrons are flowing from the anode to the cathode.
http://www.physchem.co.za/current10/curr...

2) Ok, so the equation is F=Eq; the derivation is at the link below...
http://www.rci.rutgers.edu/~williebo/r18...

3) To see how they were originally developed look here...
http://schools.cbe.ab.ca/b858/dept/sci/t...
Short answer: Cathode rays are emitted from the cathode in a discharge tube, when pressure is reduced to 0.01 mm of mercury.
http://64.233.167.104/search?q=cache:27f...

4) electric field is the space surrounding an electric charge.
http://en.wikipedia.org/wiki/electric_fi...
magnetic induction - the production of voltage across a conductor situated in a changing magnetic field
http://en.wikipedia.org/wiki/electromagn...

5) best i could find about Thompson
http://www.aip.org/history/electron/jj18...

6) Sorry, i'm not sure what -ve potentials are?