P.3.7.5.2 Moving charges in a magnetic field

Quiz
•
Physics
•
11th - 12th Grade
•
Medium
Stanton Wertjes
Used 22+ times
FREE Resource
25 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Different magnetic fields are present in the two chambers shown. A particle enters the first chamber at a velocity of 80 m s–1 and is deflected into a circular path of radius 200 mm.
In the second chamber it follows a circular path of radius 100 mm
The particle leaves the second chamber at a speed of
20 m s–1
40 m s–1
80 m s–1
160 m s–1
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Two charged particles, P1 and P2, follow circular paths as they move at right angles to the same uniform magnetic field. Both particles are travelling at the same speed.
The radius of the path travelled by P1 is twice the radius of the path travelled by P2.
The mass of P1 is m and its charge is q.
What is the mass of P2 and the charge of P2?
A
B
C
D
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Charged particles, each of mass m and charge Q, travel at a constant speed in a circle of radius r in a uniform magnetic field of flux density B.
Which expression gives the frequency of rotation of a particle in the beam?
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which one of the following statements is correct?
An electron follows a circular path when it is moving at right angles to
a uniform magnetic field.
a uniform electric field.
uniform electric and magnetic fields which are perpendicular.
uniform electric and magnetic fields which are in opposite directions.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Two electrons, X and Y, travel at right angles to a uniform magnetic field. X experiences a magnetic force, FX, and Y experiences a magnetic force, FY.
What is the ratio shown if the kinetic energy of X is half that of Y?
1/4
1/2
1
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The path followed by an electron of momentum p, carrying charge –e, which enters a magnetic field at right angles, is a circular arc of radius r.
What would be the radius of the circular arc followed by an α particle of momentum 2p, carrying charge +2e, which entered the same field at right angles?
r
2r
4r
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which line, A to D, in the table correctly describes the trajectory of charged particles which enter separately, at right angles, a uniform electric field, and a uniform magnetic field?
A
B
C
D
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