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CBSE Class 12 » CBSE Class 12 Study Materials » Physics » Energy consideration
CBSE

Energy consideration

The concepts of force and energy are well-known. But what is the connection between matter and energy? Let us find out

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The concepts of force and energy are well known. What is the connection between matter and energy? Consideration of energy is a solution to this issue. Newton’s problems may also be solved using energy considerations. Let us examine them more closely.

What is energy consideration in ionic bonding

It is only through exerting physical effort that we can finish a task, and this is the very definition of force. To put our bodies through their paces, we need a lot of energy. Consequently, this place may have a link between force and energy. The notion of energy conservation links these two concepts.

Energy considerations in motional EMF may be used to show that motional EMF is correct or valid in terms of energy conservation. To demonstrate the validity of the energy consideration notion, we shall use mathematical reasoning.

The Universal Energy Conservation Principle and Lenz’s Theorem

All people are familiar with the concepts of force and energy. Since force and energy are intertwined, Energy Consideration helps bridge the gap. Energy concepts may help with Newtonian problems.

In 1834, Heinrich Friedrich Lenz, a German physicist, came up with Lenz’s Law to explain why certain things are more likely to happen than others. An EMF’s polarity is clearly and simply shown. In accordance with the law, a current may be produced by variations in magnetic flux, although this current generally has the polarity opposite to that of the flux shift.

With the help of Lenz’s Law, you may conduct experiments

Closed-coil experiments bring a bar magnet’s north pole towards it. The magnetic flux increases as the bar magnet’s north pole approaches the coil. The coil generates an anti-clockwise flow of current.

 

This can only be accomplished if the coil’s current is flowing in the opposite direction of the observer’s clock. As it gets closer to the approaching magnet’s north pole, the magnetic moment of this current becomes north-polarised. Similar to removing the north pole of a magnet, this lowers the magnetic flux that may flow through the coil. Because of the bar magnet’s north pole, the coil current is flowing counterclockwise to compensate for its loss of magnetic flux.

The injected force attracts the magnet, which prevents it from moving. Instead of a closed circuit, an EMF is generated across the open circuit ends. The direction of the induced EMF may be determined using Lenz’s law.

Coil-generated current will attract the south pole towards the magnet, which is rapidly approaching. When a little amount of force is applied to the magnet, the resulting increase in velocity and kinetic energy persists indefinitely. There may be a way to build a machine that defies the principle that all energy is conserved.

Take into account the following factors: Energy consideration–a quantitative study

  • In the context of energy, force and energy are linked.
  • Energy concepts may help with Newtonian problems.
  • In 1834, Heinrich Friedrich Lenz, a German physicist, came up with Lenz’s Law to explain why certain things are more likely to happen than others.

Conclusion: Energy Consideration

Every day, we put our bodies through strenuous work that necessitates significant energy consumption. As a result of the interplay between force and energy in this circumstance, the two are intertwined. Motional EMF may be shown to be appropriate or valid in terms of energy conservation by using an energy consideration in motional EMF. To prove that the idea of

faq

Frequently asked questions

Get answers to the most common queries related to the CBSE class 12 Examination Preparation.

What is the root cause of Induced EMF?

Ans: A current-carrying loop induces a magnetic flux fluctuat...Read full

When and by whom was Lenz's law initially put forth?

Ans: Emil Lenz formulated Lenz’s law. This law describe...Read full

What is static- and dynamically-induced EMF?

Ans: When the conductor is moved in a fixed magnetic field su...Read full

What controls the direction of induced EMF in a conductor or coil?

Ans: When the conductor moves in the magnetic field, the elec...Read full

Ans: A current-carrying loop induces a magnetic flux fluctuation that results in an electromagnetic field (EMF).

 

Ans: Emil Lenz formulated Lenz’s law. This law describes the flow of electrons via a circuit. Electromagnetic Induction’s EMF and current may be predicted using this rule.

Ans: When the conductor is moved in a fixed magnetic field such that the magnetic flux connecting with it varies in magnitude, as the conductor is exposed to a changing magnetic field; consequently an EMF will be generated in it. The EMF created in this method is known as dynamically-induced EMF (as in a DC or AC generator).

 

Ans: When the conductor moves in the magnetic field, the electric current will be generated in the conductor. The direction of the current will yield the direction of the induced EMF. Therefore, the orientation of the induced EMF is decided by Fleming’s right-hand thumb rule.

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