Report_Magnetic_Forces

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B7

Consider a beam of electrons that moves from the electron gun towards the screen of a cathode ray tube due to the potential difference of 15kV. A pair of coils are placed outside a cathode ray tube and produce a uniform magnetic field of 250 µT across the tube. Calculate the force experienced by the electrons if the magnetic field is in place: a. parallel with the direction of the beam. b. Perpendicular with the direction of the beam. c. 50 degrees with the direction of the beam.

Consider a beam of electrons that moves from the electron gun towards the screen of a cathode ray tube due to the potential difference of 15kV. A pair of coils are placed outside a cathode ray tube and produce a uniform magnetic field of 250 µT across the tube. Calculate the force experienced by the electrons if the magnetic field is in place:a. parallel with the direction of the beam.b. Perpendicular with the direction of the beam.c. 50 degrees with the direction of the beam

Fmagnetic= BIe A wire 36 m long carries a current of 22 A. If the magnetic field on the 100 p wire has a magnitude of 4 x 10 -2 N, find the magnitude of the magnetic force. Use the GUESS method Your answer Submit Never submit passwords through Google Forms. This form was created inside of Fort Hancock Independent School District Report Abuse

5.0 m/s 10 cm A potential difference of 0.050 V is developed across the 10-cm-long wire of the above figure as it moves through a magnetic field perpendicular to the page. What are the strength and direction (into the page or out of the page) of the magnetic field?

Question 1 For an eleciric field of 2.5 x 10 V/m, what is the sırength of the magnetic field needed to pass an elec- tron of speed 2.2 x 105 m/s with no deflection? Draw the muually perpendicular a, Ē, and Ē directions that allow this to Occur.

1. A beam of electrons whose kinetic energy is Kemerges from a thin-foil "window" at the end of an accelerator tube. Ametal plate at distance d from this window is perpendicular to the direction of the emerging beam. What minimum strength uniform magnetic field could you apply to prevent the beam from hitting the metal plate? Express your final answer in terms of K, d, and any known constants.

Q3: semicomductor sheet have dimensions (5,4,2)mm, electric field applied is 2 volt, the current value is 40 A passes through it, a magnetic field of 0.1Tis is directed and hall emf of 15 m volt, find conductivity ,drift velocity, charge density of free electron in this conductor per cubic meter, mobility of charges? 2. E= ? JA-15 11

Answer A) , B) , C)

Q1: conductor that is 5 cm wide and 1 cm tall has a current of 30 A flowing through it, a magnetic field of 15 Tis is directed and hall emf of 12 µ volt (a) calculate the electric field in this conductor that is perpendicular to the current ,(b) determine the drift velocity of the electron, (c) calculate the charge density of free electron in this conductor per cubic meter?