Class 12 Physics | Moving Charges and Magnetism | Biot–Savart Law | NCERT Chapter 4 | Ashu Sir
Doubtnut Learn and Fun Class 12・2 minutes read
Chapter 4 discusses Electric Current Electrodynamics and the effects when current passes through a conductor. The text also delves into the creation of magnetic fields, the Biot Savart Law, and the work of Nikola Tesla in wireless electricity transmission.
Insights
- When current passes through a conductor, three effects are observed: magnetic effect, heating effect, and chemical effect, with the creation of a magnetic field being a direct consequence.
- Nikola Tesla's pioneering work on wireless electricity transmission, though groundbreaking, faced resistance during his time, hindering potential advancements in wireless technology despite his significant contributions.
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Recent questions
What are the effects of electric current on a conductor?
The effects of electric current on a conductor include magnetic effect, heating effect, and chemical effect.
How is a magnetic field created around a conductor?
A magnetic field is created around a conductor when current flows through it.
What factors affect the strength of a magnetic field?
The strength of a magnetic field is directly proportional to the current passing through the conductor, the length of the element, and sine theta. It is inversely proportional to the distance squared.
What does the Biot Savart Law explain?
The Biot Savart Law explains the magnetic field in vector form, showing how the magnetic field is created around a current-carrying conductor.
Who is Nikola Tesla and what is his contribution to science?
Nikola Tesla was a significant figure in science known for his groundbreaking work on wireless electricity transmission. Despite his innovative contributions, his ideas were not fully embraced during his time, impacting the potential advancements in wireless technology.
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Summary
00:00
Electric Current and Magnetic Field Relationship
- Chapter number 4 is about Electric Current Electrodynamics.
- Three effects seen when current passes through a conductor: magnetic effect, heating effect, and chemical effect.
- Magnetic field is created around a conductor when current flows through it.
- Magnetism and matter are discussed in the next chapter.
- Magnets attract small iron pieces and create a magnetic field around them.
- Magnetic field is directly proportional to the current passing through the conductor.
- Magnetic field is directly proportional to the length of the element.
- Magnetic field is directly proportional to sine theta.
- Magnetic field is inversely proportional to the distance squared.
- Biot Savart Law explains the magnetic field in vector form.
24:20
"Tesla's Cross Products: Magnetic Fields and Innovation"
- When two individuals are multiplied in cross products, a new person is created, representing a magnetic field quantity.
- Cross products indicate vector quantities, with direction determined by the right-hand rule, showing the magnetic field's orientation.
- The magnetic field's unit is Tesla, with its measurement indicating the strength of the field.
- Nikola Tesla, a significant figure in science, is highlighted for his groundbreaking work on wireless electricity transmission.
- Despite Nikola Tesla's innovative contributions, his ideas were not fully embraced during his time, impacting the potential advancements in wireless technology.
