# Magnetic field could only affect moving charges?

• yuenkf
In summary, a current carrying wire or loop can experience a force or torque under a magnetic field, according to the Biot-Savart law and the concept of magnetic moment. This is due to the movement of charge, or current, in the wire or loop. A permanent ferromagnet has electrons that are all orbiting in the same axis, leading to the force we experience as magnetism.
yuenkf
no other thing is under effect of B ? srry .i m not good in eng , hope u seniors can understd my q. thanks lot..

A current carrying wire can experience a force given by Biot-Savart law.
A current carrying loop under magnetic field can experience torque which comes under magnetic moment.
$$\tau = M*B$$
But even then in both cases there is a movement of charge(current).

Yes.
Incase youre wondering, what we normally consider a "magnet" is a little complicated
Normally electrons orbit around the nucleus in random configurations, while a permanent ferromagnet has electrons all orbitting around the same axis.
Essentially the force we normally experience as magnetism is the interaction between the electrons, that are moving(even though the atoms appear stationary)

Last edited:
hmm.. thanks for ur replies... appreciate it much...

Yes, a magnetic field can only affect moving charges. Magnetic fields are created by the movement of charges and can only interact with other moving charges. Other objects, such as stationary objects or non-conductive materials, are not affected by magnetic fields. However, it is important to note that moving charges can also create electric fields, which can affect other objects, even if they are not moving. I hope this helps clarify your question.

## 1. What is a magnetic field?

A magnetic field is a force field that surrounds a magnet or a moving electric charge. It is created by the movement of electric charges and can be felt by other magnets or moving charges within its vicinity.

## 2. How does a magnetic field affect moving charges?

A magnetic field exerts a force on a moving electric charge, causing it to move in a circular or helical path. This force is known as the Lorentz force and is perpendicular to both the direction of the magnetic field and the velocity of the charge.

## 3. Can a magnetic field affect stationary charges?

No, a magnetic field only affects moving charges. Stationary charges experience no force in a magnetic field. This is because the force exerted by a magnetic field is dependent on the velocity of the charge.

## 4. How does the strength of a magnetic field affect its impact on moving charges?

The strength of a magnetic field determines the magnitude of the force exerted on a moving charge. The stronger the magnetic field, the greater the force experienced by the charge. This can also affect the path of the charge, as a stronger magnetic field can cause a tighter circular or helical motion.

## 5. What is the relationship between a magnetic field and an electric field?

A changing magnetic field can create an electric field and vice versa. This phenomenon is known as electromagnetic induction and is the basis of many technologies, such as generators and transformers. In addition, the behavior of charged particles in a magnetic field is similar to that of charged particles in an electric field, with the main difference being the direction of the force exerted on the charged particle.

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