✅ In this video,
✔️ Class: 12th
✔️ Subject: Physics
✔️ Chapter: Electromagnetic Induction
✔️ Topic Name: DC MOTOR, AC GENERATOR, LC OSCILLATIONS | Class 12th Physics | NCERT Physics Class 12 Chapter 6
Basics of Electromagnetic Induction class 12 physics by Devendra Kataria sir in an easy and interesting way.
B2E learning brings you a very important lecture on the basics of Electromagnetic Induction of class 12 physics for NEET and JEE students. In this comprehensive video, we delve into "Electromagnetic Induction," specifically focusing on "DC MOTOR, AC GENERATOR, LC OSCILLATIONS", a crucial topic from Class 12 Physics Chapter 6.
Whether you are a CBSE student or preparing for JEE 2024 or NEET 2024 This physics video tutorial provides a basic introduction to "DC MOTOR, AC GENERATOR, LC OSCILLATIONS."
In this video, we discussed about What is DC MOTOR, AC GENERATOR, LC OSCILLATIONS.
PRINCIPLE OF DC MOTOR
This DC or direct current motor works on the principal, when a current carrying conductor is placed in a magnetic field, it experiences a torque and has a tendency to move.
This is known as motoring action. If the direction of current in the wire is reversed, the direction of rotation also reverses. When magnetic field and electric field interact they produce a mechanical force, and based on that the working principle of DC motor is established.
The direction of rotation of a this motor is given by Fleming’s left hand rule, which states that if the index finger, middle finger and thumb of your left hand are extended mutually perpendicular to each other and if the index finger represents the direction of magnetic field, middle finger indicates the direction of current, then the thumb represents the direction in which force is experienced by the shaft of the DC motor.
Structurally and construction wise a direct current motor is exactly similar to a DC generator, but electrically it is just the opposite. Here we unlike a generator we supply electrical energy to the input port and derive mechanical energy from the output port
This physics video tutorial provides a basic introduction into the mutual inductance of solenoids. The emf induced in a second coil is proportional to the mutual inductance of the two coils and the rate of change of the current in the first coil. The mutual inductance depends on the number of turns in the other coil, the magnetic flux that flows in the second coil and the current flowing in the first coil. This video provides plenty of examples and practice problems.
A.C. generators or alternators (as they are usually called) operate on the same fundamental principles of electromagnetic induction as D.C. generators.
Alternating voltage may be generated by rotating a coil in the magnetic field or by rotating a magnetic field within a stationary coil. The value of the voltage generated depends on-
The number of turns in the coil.
Strength of the field.
The speed at which the coil or magnetic field rotates.
LC CIRCUIT AND WORKING
We know that a capacitor and an inductor can store electrical and magnetic energy, respectively. When a capacitor (initially charged) is connected to an inductor, the charge on the capacitor and the current in the circuit exhibit the phenomenon of electrical oscillations similar to oscillations in mechanical systems.
This topic is from Chapter 6: 'Electromagnetic Induction' for Class 12 from NCERT.
Best CBSE NCERT physics learning videos with clear examples and explanations, for NEET, IIT JEE, CBSE, JIPMER, EAMCET, and AIIMS as well as class 12th students.
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Important Time Stamps-
0:00:00 - Highlight
0:32 - Introduction
0:45 - DC Motor
10:45 - AC Generator
14:30 - LC Oscillations
24:00 - Important Example
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