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The electromagnetic force and/or torque, developed in any physical system, acts in such a direction as to tend to ____________
- a)decrease the magnetic stored energy at constant mmf
- b)decrease the magnetic stored energy at constant flux
- c)increase the magnetic stored energy at constant flux
- d)increase the magnetic stored energy at constant current
Correct answer is option 'B'. Can you explain this answer?
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The electromagnetic force and/or torque, developed in any physical sys...
fe = -(∂Wfld (φ, x))/∂x = -(∂Wfld (∅,x))/∂x and Te = -(∂Wfld(φ,θ))/∂θ = -(∂Wfld (∅,θ))/∂θ
The negative sign before ∂Wfld indicates that fe acts in a direction as to tend to decrease the stored energy at constant mmf.
The negative sign before ∂Wfld indicates that fe acts in a direction as to tend to decrease the stored energy at constant mmf.
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The electromagnetic force and/or torque, developed in any physical sys...
Explanation:
The electromagnetic force and torque are developed in any physical system due to the interaction between magnetic fields and electric currents. These forces and torques can act in different directions depending on the specific configuration of the system. However, in this particular scenario, we are considering the effect of these forces and torques on the magnetic stored energy.
Understanding magnetic stored energy:
Magnetic stored energy refers to the energy stored in a magnetic field. It is proportional to the square of the magnetic flux and inversely proportional to the permeability of the medium. When current flows through a conductor, it creates a magnetic field around it, and this magnetic field stores energy.
The effect of electromagnetic force and torque on magnetic stored energy:
The electromagnetic force and torque developed in a physical system tend to decrease the magnetic stored energy at constant flux. This can be explained as follows:
When a force or torque is applied to a magnetic system, it tends to change the magnetic field configuration. If the force or torque causes the magnetic field to change in such a way that the magnetic flux decreases, then the magnetic stored energy also decreases. This is because the energy stored in the magnetic field is directly proportional to the square of the magnetic flux.
Example:
Let's consider the example of an electromagnetic relay. An electromagnetic relay consists of a coil of wire wound around a soft iron core. When current flows through the coil, it generates a magnetic field that attracts an armature, causing mechanical movement. In this case, if an external force is applied to the armature, it will tend to move in a direction opposite to the magnetic force developed by the coil. This will result in a change in the magnetic field configuration, leading to a decrease in the magnetic flux and consequently, a decrease in the magnetic stored energy.
Conclusion:
In summary, the electromagnetic force and torque developed in any physical system tend to decrease the magnetic stored energy at constant flux. This is because the force or torque causes a change in the magnetic field configuration, resulting in a decrease in the magnetic flux and thus, a decrease in the magnetic stored energy.
The electromagnetic force and torque are developed in any physical system due to the interaction between magnetic fields and electric currents. These forces and torques can act in different directions depending on the specific configuration of the system. However, in this particular scenario, we are considering the effect of these forces and torques on the magnetic stored energy.
Understanding magnetic stored energy:
Magnetic stored energy refers to the energy stored in a magnetic field. It is proportional to the square of the magnetic flux and inversely proportional to the permeability of the medium. When current flows through a conductor, it creates a magnetic field around it, and this magnetic field stores energy.
The effect of electromagnetic force and torque on magnetic stored energy:
The electromagnetic force and torque developed in a physical system tend to decrease the magnetic stored energy at constant flux. This can be explained as follows:
When a force or torque is applied to a magnetic system, it tends to change the magnetic field configuration. If the force or torque causes the magnetic field to change in such a way that the magnetic flux decreases, then the magnetic stored energy also decreases. This is because the energy stored in the magnetic field is directly proportional to the square of the magnetic flux.
Example:
Let's consider the example of an electromagnetic relay. An electromagnetic relay consists of a coil of wire wound around a soft iron core. When current flows through the coil, it generates a magnetic field that attracts an armature, causing mechanical movement. In this case, if an external force is applied to the armature, it will tend to move in a direction opposite to the magnetic force developed by the coil. This will result in a change in the magnetic field configuration, leading to a decrease in the magnetic flux and consequently, a decrease in the magnetic stored energy.
Conclusion:
In summary, the electromagnetic force and torque developed in any physical system tend to decrease the magnetic stored energy at constant flux. This is because the force or torque causes a change in the magnetic field configuration, resulting in a decrease in the magnetic flux and thus, a decrease in the magnetic stored energy.
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The electromagnetic force and/or torque, developed in any physical system, acts in such a direction as to tend to ____________a)decrease the magnetic stored energy at constant mmfb)decrease the magnetic stored energy at constant fluxc)increase the magnetic stored energy at constant fluxd)increase the magnetic stored energy at constant currentCorrect answer is option 'B'. Can you explain this answer?
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The electromagnetic force and/or torque, developed in any physical system, acts in such a direction as to tend to ____________a)decrease the magnetic stored energy at constant mmfb)decrease the magnetic stored energy at constant fluxc)increase the magnetic stored energy at constant fluxd)increase the magnetic stored energy at constant currentCorrect answer is option 'B'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about The electromagnetic force and/or torque, developed in any physical system, acts in such a direction as to tend to ____________a)decrease the magnetic stored energy at constant mmfb)decrease the magnetic stored energy at constant fluxc)increase the magnetic stored energy at constant fluxd)increase the magnetic stored energy at constant currentCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The electromagnetic force and/or torque, developed in any physical system, acts in such a direction as to tend to ____________a)decrease the magnetic stored energy at constant mmfb)decrease the magnetic stored energy at constant fluxc)increase the magnetic stored energy at constant fluxd)increase the magnetic stored energy at constant currentCorrect answer is option 'B'. Can you explain this answer?.
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