Question #11? Fall 2014 Sample Exa LON-CAPA. My C ps //black dt content d 383768

Question

Question #11?

Fall 2014 Sample Exa LON-CAPA. My C ps //black dt content d 38376822 1/courses/PHY131-17500 Fall%202014%20Sample%20E 7500-C10003644 7 16 Fall 2014 Sample Exams. C) 2.25 m to the left of the 1 amp wire. 2.25 m to the right exf the i amp wire E) 3.0 m to the left of the l amp wire. 11) The velocity selector shown below allows a charged particle Q to pass through without being deflected as long as its velocity is 8000 m/sec. Which statement is EALSE? A) Any charged particle traveling at 8000 m/see passes through undeflected. B) If v-7000 m/sec, a positive charge deflects left. v 8000 m/s lfv-9000 insec, a negative charge deflects left. x x x x x D) If the magnetic field is increased, all positive charges with v 8000 m/sec deflect right. E) f the electric field is increased, all negative charges with v 8000 m/sec deflect left. X X X 12) Shown below are two wire segments each 0,5 meters long carrying currents 2 Amps and 3 Amps. What is the force on the wire carrying 2 Amps? A) 3 x 10 N, up B) 3 x 103N, down 20 cm C) 3x 10 N., up Amps D) 3 x 10 N, down 3 x 10 N, up A 03 PM 4 2/20/2017

Explanation / Answer

11) electric field(qE) which is balanced by qvb force of magnetic force at V = 8000m/sec

let say left to right +ve and right to left -ve directions

A) true already given

B) +ve charge this means Fe = -ve and Fb = +ve V decrease so Fb decreases so deflected to -ve true

C) in this case Fb increase but its direction -ve so defection left true

D) q=+ve , Fe= -ve , Fb= +ve B increases Fb increases right defeltion true

E ) q=-ve , Fe= +ve , Fb= -ve E increase , Fe increases right defeltion False

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