Hence magnetic forces do no work on charged particles and cannot increase their kinetic energy. If a charged particle moves through a constant magnetic field, its speed stays the same, but its direction is constantly changing.
Q. When a charged particle moves in a straight line a magnetic field is?
Figure 11.4. 2: A charged particle moving with a velocity not in the same direction as the magnetic field. The velocity component perpendicular to the magnetic field creates circular motion, whereas the component of the velocity parallel to the field moves the particle along a straight line.
Table of Contents
- Q. When a charged particle moves in a straight line a magnetic field is?
- Q. Why the kinetic energy of charge particle moving in a perpendicular magnetic field remains constant?
- Q. Which field can change the kinetic energy of a charged particle?
- Q. What is the force acting on a moving charge in a uniform magnetic field?
- Q. Is any work done by magnetic field on a moving charge?
- Q. Is work done in a magnetic field?
- Q. Why work done in a magnetic field is zero?
- Q. What is the charge of magnetic field?
- Q. What direction is magnetic force?
- Q. How do magnetic fields attract?
- Q. How can a magnet attract or repel another magnet even if they are not touching?
- Q. Why can magnets attract objects without touching them?
- Q. What types of materials do magnets attract?
- Q. Which metal is most magnetic?
Q. Why the kinetic energy of charge particle moving in a perpendicular magnetic field remains constant?
The force, experienced by the charge particle is perpendicular to the instantaneous velocity, V at all instants. Hence, the magnetic force cannot bring any charge in the speed of the charged particle. Since the velocity remains constant, the kinetic energy also remains constant.
Q. Which field can change the kinetic energy of a charged particle?
magnetic field
Q. What is the force acting on a moving charge in a uniform magnetic field?
The magnetic force on a free moving charge is perpendicular to both the velocity of the charge and the magnetic field with direction given by the right hand rule. The force is given by the charge times the vector product of velocity and magnetic field.
Q. Is any work done by magnetic field on a moving charge?
No work is done by the magnetic field on the moving charge.
Q. Is work done in a magnetic field?
No work is done by the magnetic field on the charge. B. Magnetic fields can also be produced by a moving charge whose intensity can be determined by the velocity and magnitude of charge.
Q. Why work done in a magnetic field is zero?
Because the magnetic force on a moving charge is perpendicular to the velocity, the work done by a magnetic force is zero.
Q. What is the charge of magnetic field?
The direction of the magnetic force on a moving charge is perpendicular to the plane formed by v and B and follows right hand rule–1 (RHR-1) as shown. The magnitude of the force is proportional to q, v, B, and the sine of the angle between v and B.
Q. What direction is magnetic force?
Magnetic fields exert forces on charged particles in motion. The direction of the magnetic force F is perpendicular to the plane formed by v and B as determined by the right hand rule.
Q. How do magnetic fields attract?
All magnets have north and south poles. Opposite poles are attracted to each other, while the same poles repel each other. When you rub a piece of iron along a magnet, the north-seeking poles of the atoms in the iron line up in the same direction. The force generated by the aligned atoms creates a magnetic field.
Q. How can a magnet attract or repel another magnet even if they are not touching?
All magnets have two ends, which are commonly referred to as north and south poles. The determining factor of whether a magnet attracts or repels is the pole. Magnets attract when a north pole is introduced to a south pole. If like poles are introduced, either north to north or south to south, the magnets repel.
Q. Why can magnets attract objects without touching them?
Magnetic forces are non contact forces; they pull or push on objects without touching them. Magnets are only attracted to a few ‘magnetic’ metals and not all matter. Magnets are attracted to and repel other magnets.
Q. What types of materials do magnets attract?
Magnets are only attracted to special metals. Iron, cobalt and nickel are magnetic. Metals that have iron in them attract magnets well. Steel is one.
Q. Which metal is most magnetic?
iron