Problem 1 a) What valuc of magnetic field would make a beam of electrons, travel

Question

Problem 1 a) What valuc of magnetic field would make a beam of electrons, traveling West at a speed of 2.0x10 ms, go undeflected through a region where there is a uniform electric field of 3.0x1o Vim pointing North? Submit Answer Tries 0/6 b) What is the direction of the magnetic field assuming it is not pointing East? West North Into the Page Out of the page O South Submit AnswerTries 0/6 c) What is the frequency of the circular orbit if the electric field is turned off? Submit Answer)Tries 0/6 Due Friday April 06 11:59 am (EDT)

Explanation / Answer

(A)

F(net) = qE + qvB = 0

B = E/v = 3×10^4/2x10^6 = 0.015 T

(B) since charge is negative .

Velocity in -ve direction . E in +y direction .

Hence magneticfield is into the page direction

C-
F(net) = qvB = ma = mr?²

also v = r?

qr?B = mr?²

? = qB/m

f = qB/2?m

  =1.6*10^-19*0.015/(2*3.14*9.1*10^-31)

   =4.2 *10^8 Hz

Related Questions

Navigate

• Browse (All)
• Browse P
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.