What happens if a wire carrying current is placed in a magnetic field?

Question

BlackTom AI · Accepted Answer

When a wire carries current and is placed in a magnetic field, several effects can be considered depending on the situation, so we evaluate each option one by one.

a. The wire will experience a magnetic force
- This is the standard result from the magnetic force on a current-carrying wire: F = I (L × B). The force is perpendicular to both the current direction and the magnetic field. In a uniform field, a straight wire experiences a net force equal to the cross product of the current element vector and the magnetic field. This option correctly describes the primary effect.

b. The wire will experience a magnetic loop
- A straight section of wire in a uniform magnetic field does not spontaneously form a loop due to the field alone. Magnetic loops are more characteristic of magnetic cores, current loops, or the bending of wire under certain constraints, not a universal consequence for a single straight wire with current.

c. The wire will experience a magnetic energy
- A magnetic energy is associated with the magnetic field configuration (such as energy stored in inductors or the energy of a magnetic field in space). However, a single straight current-carrying wire in a static, external magnetic field does not imply the wire itself experiences a separate, discrete magnetic energy as an effect; the relevant instantaneous effect in this setup is the force due to F = I L × B. This statement is not the standard immediate consequence of placing a current in a magnetic field.

d. The wire will experience a magnetic torque
- Torque arises when you have a current distribution that can rotate or when a loop experiences a magnetic moment in a field. A straight wire by itself has no intrinsic magnetic moment to torque in the field. Only a closed loop or a current distribution with angular dependence would typically experience torque. Therefore, a straight wire does not experience a torque in this context.

In summary, among the options, the most direct and correct description of what happens to a straight wire carrying current in a magnetic field is that it experiences a magnetic force. The other options describe phenomena that either do not occur for a straight wire in a uniform field or refer to effects (torque, loop formation, magnetic energy as a property of the wire itself) that are not the typical immediate outcome in this scenario.

UCIC 202503 PHYS101 Quiz 11

What happens if a wire carrying current is placed in a magnetic field?

查看解析

登录即可查看完整答案

类似问题

What is the magnitude of the magnetic force on a current carrying wire?

Which of the following pairs of quantities are not always perpendicular?

What is the magnitude of the magnetic force on a charged particle?

The force on a charged particle created by its motion in a magnetic field is maximum at what angle between the particle velocity and field?

An electron enters a magnetic field parallel to B. The electron's

A horizontal wire of length 3.0 m carries a current of 6.0 A and is oriented so that the current direction is 50o S of W. The horizontal component of the Earth's magnetic field is due north at this point and has a strength of 0.14 x 10-4 T. What is the size of the force on the wire?

A 2.0 m wire segment carrying a current of 0.60 A oriented parallel to a uniform magnetic field of 0.50 T experiences a force of what magnitude?

The direction of the force on a current carrying wire located in an external magnetic field is which of the following?

更多留学生实用工具

考试浏览器助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单