0
You visited us 0 times! Enjoying our articles? Unlock Full Access!
Question

Which of the following statement is correct?
  1. If a moving charged particle enters into a region of magnetic field from outside, it does not complete a circular path.
  2. If a moving charged particle traces a helical path in a uniform magnetic field, the axis of the helix is parallel to the magnetic field.
  3. The power associated with the force exerted by a magnetic field on a moving charged particle is always equal to zero.
  4. If in a region a uniform magnetic field and a uniform electric field both exist, a charged particle moving in this region cannot trace a circular path.

A
If in a region a uniform magnetic field and a uniform electric field both exist, a charged particle moving in this region cannot trace a circular path.
B
If a moving charged particle traces a helical path in a uniform magnetic field, the axis of the helix is parallel to the magnetic field.
C
The power associated with the force exerted by a magnetic field on a moving charged particle is always equal to zero.
D
If a moving charged particle enters into a region of magnetic field from outside, it does not complete a circular path.
Solution
Verified by Toppr

a) If the charged particle enters the magnetic field from outside, depending on the width of the magnetic field, the trajectory will be a portion of the circle.
If the particle gets created inside the magnetic field, it will complete a circle provided the width of the magnetic field is sufficient.
b) In a helical path, the velocity component parallel to magnetic field makes it move along it. The circular path will be perpendicular to the magnetic field.
c) Power P=F.v=q(v×B).v=0
d) If both E and B are present and EB, path will be helical.
If both E and B are present and EB, radius will not be constant, hence it cannot trace a circular path.

Was this answer helpful?
0
Similar Questions
Q1
The path traced by a charged particle moving in a region of magnetic field cannot be:
View Solution
Q2
Assertion :If a charged particle is released from rest in a region of uniform electric and magnetic fields parallel to each other, it will move in straight line. Reason: The electric field exerts no force on the particle but the magnetic field does.
View Solution
Q3
A charged particle with charge q is moving in a uniform magnetic field. If this particle makes any angle with the magnetic field then its path will be :
View Solution
Q4
A particle moves in a region having a uniform magnetic field and a parallel, uniform electric field. At some instant, the velocity of the charged particle is perpendicular to the field direction. The path of the particle will be
View Solution
Q5
A charged particle is moving in a circular path in uniform magnetic field with speed v. Match the following
View Solution