Current is produced in a conductor when it is moved through a magnetic field because the magnetic lines of force are applying a force on the free electrons in the conductor and causing them to move.
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Which statement is true for magnetic field lines?
Magnetic field lines make closed rings for single magnetic poles that don’t exist, unlike an electric charge. Therefore, these lines always form closed loops and option(B) is correct. Note: Magnetic field lines are imaginary lines that describe magnetic fields. It provides the path of magnetic force.
In what direction is the force Fโ exerted by the magnetic field on the electron?
-the direction of the force is always perpendicular to the direction of the current and also perpendicular to the direction of the magnetic field.
Is there a net magnetic force on the loop?
The net force on a current-carrying loop of any plane shape in a uniform magnetic field is zero.
What happens to a copper wire when it is moved across a magnetic field?
When a copper conductor is moved across a magnetic field, an emf or voltage is induced in the wire. Principle of Generation of EMF: Faraday’s Law of Electromagnetic Induction states that whenever there is a relative motion between a conductor and magnetic field, an emf will be induced.
When a magnet and the conductor move relative to each other what is being produced?
Electromagnetic induction is the process of generating electric current with a magnetic field. It occurs whenever a magnetic field and an electric conductor move relative to one another so the conductor crosses lines of force in the magnetic field.
Is a magnetic field invisible?
Although the magnetic field is invisible, it can be seen indirectly. Iron filings placed in the magnetic field will show where the lines of force lie. Small compasses placed in the magnetic field will show the direction of the force field.
What force does a magnetic field apply without actually touching the object?
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.
What type of curve is between magnetic field and distance?
Answer: Magnetic field lines are closed curves.
What is the force on a charge moving in magnetic field?
When a charge moves through both an electric and magnetic field, the net force on the charge is known as the Lorentz force. It is basically the sum of the magnetic and electric forces.
Why magnetic force is perpendicular to magnetic field?
The superficial answer is simply that the Lorentz (magnetic) force is proportional to vรB, where v is the particle velocity and B is the magnetic field. Since the vector cross product is always at right angles to each of the vector factors, the force is perpendicular to v.
What is the force experienced by a moving charge in a magnetic field?
Lorentz force, the force exerted on a charged particle q moving with velocity v through an electric field E and magnetic field B. The entire electromagnetic force F on the charged particle is called the Lorentz force (after the Dutch physicist Hendrik A. Lorentz) and is given by F = qE + qv ร B.
What is the source of all magnetism?
Electric current is the source of all magnetism. (a) In the planetary model of the atom, an electron orbits a nucleus, forming a closed-current loop and producing a magnetic field with a north pole and a south pole.
What is magnetic field equation?
The magnitude of the force on a wire carrying current I with length L in a magnetic field is given by the equation. F=ILBsinฮธ where ฮธ is the angle between the wire and the magnetic field. The force is perpendicular to the field and the current.
What is formula of magnetic moment?
Magnetic Moment Formula: The magnetic moment is a vector relating torque of an object to the magnetic field. This is mathematically represented as: ฯ = m ร B. Where, ฯ is the torque acting on the dipole.
What happens to the direction of the magnetic force on a wire in a magnetic field when the current in the wire is reversed?
What happens to the direction of the magnetic force on a wire in a magnetic field when the current in the wire is reversed? When current is reversed, the magnetic force acts in the opposite direction.
What happens to a current carrying wire in a magnetic field if the current is reversed?
The direction of magnetic field in a current carrying wire is perpendicular to the wire and in the direction your fingers curl if you wrap your right-hand around the wire with your thumb in the direction of current. Thus, if current is reversed, the direction of magnetic field is also reversed.
Can human sense magnetic field?
A study published today offers some of the best evidence yet that humans, like many other creatures, can sense Earth’s magnetic field.
Do magnetic fields have energy?
The energy of the magnetic field results from the excitation of the space permeated by the magnetic field. It can be thought of as the potential energy that would be imparted on a charged particle moving through a region with an external magnetic field present.
Is there any magnetic field in human body?
This article deals with a new area of research, in which magnetic fields from the human body are measured that are as weak as 1 X 10~9 gaussโabout one- billionth of the Earth’s magnetic field.
What happens when a metal object enters a magnetic field?
When the object enters the magnetic field, the force of the magnet acts, and the object is attracted. The pattern of these lines of force tells us something about the characteristics of the forces caused by the magnet. The magnetic lines of force, or flux, leave the north pole and enter the south pole.
Which magnet will produce the strongest force?
The magnetic field is strongest at the center and weakest between the two poles just outside the bar magnet. The magnetic field lines are least dense at the center and densest between the two poles just outside the bar magnet.
What are the properties of magnetic field?
Inside the magnet, the direction of the magnetic field lines is from the south pole to the north pole. Magnetic field lines never intersect with each other. Magnetic field lines form a closed-loop. Field lines have both direction and magnitude at any point on the field.
Why is there space between magnetic field lines?
Spacing between the magnetic field lines represents the strength of magnetic field in that region. Closer the magnetic field lines, stronger the magnitude of magnetic field and vice-versa. Magnetic field lines are closer to each other near the poles of magnet and far away when move away from the the magnet.
Why are magnetic field lines curved outside and parallel inside?
Magnetic field lines are closed curves because it starts from the north pole and terminates at the south pole of the magnet. Was this answer helpful?