Electromagnetism, Induction and Transformers notes
38 notes by 33 users
This page gathers over 30 user-made notes on Electromagnetism, Induction and Transformers, covering magnetic fields, circuits and induction. They are for school students revising these topics and teachers looking for ready-made material, with some university-level notes too. Pick a note to begin.
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- Electric Charge and Electric Fields51
- Capacitors and Capacitance19
- Electric Current and Circuits37
- Alternating Current and Mains Electricity11
- Magnetism and Magnetic Fields44
- Electromagnets and Magnetic Effects of Current32
- Motor Effect and Electric Motors37
- Electromagnetic Induction and Inductance71
- Electricity Generation and Transmission15
- Transformers37
- Electromagnetic Waves and Microwaves7
Notes
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ELECTROMOTIVE FORCES Moving charges give rise to magnetic fields.Magnetic field in current carrying wire (using conventional current direction):Magnetic field in flat circular coil:Magnetic field due to solenoid:Right-Hand Grip Rule (foll...
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electromagnetic induction Magnetic Flux The magnetic flux through any surface placed in a magnetic field is the total number of magnetic lines of force crossing the surface normally. It is a scalar quantity represented by fi ϕ or&nb...
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ELECTRICAL FORCES Charges: Like air molecules (following the wind analogy). Hence electrical energy is like wave motion.Note: where there is a potential difference, charges do not necessarily flow/ current not necessarily generated.Ele...
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H.W. 29/30 A Magnet and a Coil When a magnet is plunged into a coil at speed v, as shown in the figure, a voltage is induced in the coil and a current flows in the circuit. If the speed of the magnet is doubled, the induced...
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Electricity and circuits Electricity and circuits- Current and circuits Current= flow of electrical charge around a circuit. Current would only flow through an electrical component if there is a potential difference across the component and i...
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SCIENCE EXAM Magnets as compasses - The needle part of the compass is a magnet and magnets have a north and a south pole like that of a compass. Where and why compasses point in the direction they do - They follow ...
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Energy Electricity and Magnetism They are both intertwined because they are bot caused by the interaction of positive and negative matter. When charges in matter interact, they can produce both electric and magnetic forces. ...
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Wireless Charging with Electromagnetism Notes With the dependency on electronic devices, there is now a need for easier and more convenient charging solutions. With the inconvenience that each device needs a specific charger, if you carry around 3 different devic...
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5. Magnetic Fields 5. Electric currents also produce magnetic fields and these fields are used in different devices in the home 5.1 - Describe the behaviour of the magnetic poles of bar magnets when they are brought close together 5.2 -...
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SAC 3 - created from Mind Map_1 Magnets Motors Transformers
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Electricity - DC Circuits and Resistors CURRENTCurrent = flow of chargeElectric Current = rate at which charge moves across given cross sectional areaI = change in Q/ change in t measured in AMPERES Q= net charge moving (across area in time)Direct current -...
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SAC 3 - created from Mind Map Magnets Motors Transformers
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Electromagnetism: Mutual & Self-Induction Mutual Induction This occurs when two coils are in close proximity to one another A changing magnetic field in one coil induces an emf in the other coil Transformer A device used to change the voltage of A.C. power su...
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Electromagnetism: Forces in a Magnetic Field Force on a Current-carrying Conductor in a Magnetic FieldF = ILB This formula is only true if the flow of current is perpendicular to the magnetic field F = force I = current L = length B = magnetic flux density This ...
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FINAL REVISION PIECE CHALLENGE- REMEMBER EVERYTHING CIRCUITSthere are two types of circuit. One is called a series circuit, and the other is called a parallel circuit. In a series circuit, all the pieces are linked in a loop which is not split off at any point. This me...
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Electromagnetism: Magnetic Fields Magnetism The phenomenon by which certain materials (magnets) exert forces on each other These forces can be attractive or repulsive The movement of electrons (or current) within certain metals has a magnetic effect A...
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IB Topic 5 Lesson - Energy, Charge and Voltage IB Topic 5 Electricity & Magnetism Lesson Energy, Charge Voltage Textbook References: Hamper IB HL Physics - pp ; Oxford Physics Text pp Syllabus Outcomes Covered in This Lesson: Understandings: Applications and Skill...
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Electromagnetism Electromagnetic wavesJames Clerk Maxwell, 1831-1879used theory to show electric and magnetic effects can be relatedElectromagnetic wave theory Light is a kind of electromagnetic wave other wavelengths of EM waves shou...
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MFEM - created from Mind Map HAND RULES POWER GENERATION MAGNETIC FIELDS
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Electromagnetism: Electromagnetic Induction Electromagnetic InductionWhere an emf is induced by a change in the magnetic flux linking a circuit Faraday's Law The magnitude of the induced emf is proportional to the rate of change of magnetic flux E = dΦ/dt E = e...
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Electromagnetism: Magnetic Flux Density & Magnetic Flux Magnetic Flux Density The symbol used is 'B' A measure of the strength of the magnetic field Sometimes called magnetic field strength It is a vector quantity The unit of magnetic flux density is the tesla (T) The...
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Physics 1.3 Demonstrate understanding of aspects of electricity and magnetism Subject content • Phenomena, concepts, and principles: ◦ static electricity: ▪ positive and negative charge ▪ conductors and insulators ▪ uniform and non-uniform charge distributions ▪ earthing ▪ electrical discharge ...
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transformers Transformers a transformer is used by the national grid and changes potential difference ( voltage) of an alternating current using an electromagnetic induction. a transformer is a coil of wire wrapp...
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The motor and generator The electric motor As the current passes around the loop of wire one side of the loop will experience an upward force and the other a downward one - it rotates. The split ring causes the connections to the supply thro...
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AC AC Voltage Applied To A Resistor [Click Here for Sample Questions] Voltage that changes its direction every half cycle is called alternating voltage and the current flowing in the circuit at that...
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Untitled Electromagnetism -when a electronic current flows through the wire it produces a magnetic field around the wire. The magnetic field only gets produced when there is an electric current.This effect uses electroma...
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ELECTROMAGNETIC INDUCTION - created from Mind Map Faraday's Law Lenz's Law production of emf across a conductor or circuit situated in a changing magnetic field
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P3 questions How do transformers work (4) - Insulated wires are used to prevent electricity/current flowing through the iron core-alternating current in the primary coil-which produces a CHANGING magnetic field in the iron core- s...
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Loudspeakers A.C signals are sent to a coil of wire positioned inbetween two poles of a magnet. The coil of wire is wrapped next to the base of a cone. The A.C current passing through the coil cause it to move back and forth. This...
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Electromagnetism and Coulomb's law - created from Mind Map What electromagnetism is Electric charges Coulomb's law
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Lecture 3 Left-hand rule ThuMb = Motion First Finger= Magnetic Field SeCond Finger = Current Right-hand rule Thumb = Current Direction of curled fingers = Magnetic field Magnetic field lines go from north to s...
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Magnetic Effects of Electric Current MAGNETIC EFFECTS OF ELECTRIC CURRENT Certain ore attracted small pieces of iron. This ore was found in 'Magnesia'. Therefore, the ore was called MAGNETITE. The property of attracting small pieces of iron, cobalt and s...
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EMW
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Making Electromagnets How to make an electromagnet: You need a power source, a magnet, a long wire and a switch. Coil the wire around the magnet as many times as possible, but leave a small amount at either end. Connect one end to the powe...
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electric bell Electric bell It consists of a coil of wire wound on an iron piece. The coil acts like an electromagnet. An iron strip with a hammer at one end is kept close to the electromagnet. When the iron strip is in contact wit...
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Induction
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ac circuit -the scale of the hot wire ammeter is not uniform,and it's not divided into equal scale division,as the hot wire ammeter depends on thermal effect and depends on the square of the current a the heat is directly propor...
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Ampere’s Law - creado desde un Mapa Mental First discovered by André-Marie Ampère in 1826 Bibliography:
More Electromagnetism, Induction and Transformers resources
About electromagnetism, induction and transformers notes
GoConqr OriginalElectromagnetism, Induction and Transformers notes
These notes cover magnetic fields, forces, circuits and induction. Electromagnetism: Magnetic Fields is a useful starting point for reviewing magnetism and magnetic forces. For circuit basics, the notes on DC circuits and resistors cover current and charge.
When you are ready to focus on induction, Electromagnetism: Electromagnetic Induction introduces induced emf and Faraday’s law. Electromagnetism: Mutual & Self-Induction includes notes on coils and transformers. You can also find notes on making electromagnets and wireless charging.
Revise with notes
Read a short section, then put the idea into your own words before checking the note again. Compare the notes on magnetic fields with those on induction to see how the topics connect. If you want to test your understanding, switch to a quiz on the unit page; use a mind map when you want to see how ideas fit together. Choose a topic and explore the notes that match it.
Frequently asked questions
Which note could I start with?
Try “Electromagnetism: Magnetic Fields” if you want to review magnetism and magnetic forces first. If current and charge are the areas you want to revisit, start with the notes on DC circuits and resistors instead. You can then move on to the induction notes.
What do the induction notes cover?
“Electromagnetism: Electromagnetic Induction” covers induced emf and Faraday’s law. The notes on mutual and self-induction discuss coils and include a section on transformers. There is also a separate note on electromagnetic induction, so you can compare how users present the topic.
Are these notes free to use?
Yes. Every resource listed here is free to open and study without an account. The notes were made by GoConqr users, rather than GoConqr. A free account also lets you save quiz scores and make your own quizzes, mind maps, flashcards and notes.