Q: A loop that consists of 200 ( N ) turns and an area ( A ) of 0.25 m2 is located in a downward-directed magnetic field ( B ) of 0.40 T. Additionally, the loop’s coils have a resistance ( R ) of 5.0 Ω. If the coils are crushed to an area ofContinue reading “MAGNETISM AND ELECTROMAGNETISM: Lenz’ Law”
Category Archives: Magnetism and Electromagnetism
MAGNETISM AND ELECTROMAGNETISM: Electromagnetic Induction and the Electromotive Force ( emf )
Q: A metallic coil that consists of 200 ( N ) turns encloses an area ( A ) of 100 cm2. The coil is placed within a magnetic field ( B ) that is perpendicular to its area, and it has a magnetic flux density of 0.50 T. Next, the field is shut off, andContinue reading “MAGNETISM AND ELECTROMAGNETISM: Electromagnetic Induction and the Electromotive Force ( emf )”
MAGNETISM AND ELECTROMAGNETISM: Magnetism, Electromagnetic Induction, Lenz’s Law, and the Right-Hand Rule
Early experiments with magnetism revealed that a current-carrying wire is surrounded by circular lines of magnetic flux ( ɸ ). The orientation of this field could be predicted via usage of the Right-Hand Rule. These observations are indeed interesting, and they were made when the current ( I ) passing through a conductor was constant;Continue reading “MAGNETISM AND ELECTROMAGNETISM: Magnetism, Electromagnetic Induction, Lenz’s Law, and the Right-Hand Rule”
INTRODUCTION TO ELECTRONICS: Conventional Current, Kirchhoff’s Laws, Magnetic Fields, and the Right-Hand Rule
Conventional current refers to the convention in which electrical current ( I ) is considered to be a flow of positive charges. The usefulness of this convention is readily observable when dealing with Kirchoff’s Laws ( or Rules ) and the analysis of magnetic fields that encircle a conductor that carries a conventional current. OfContinue reading “INTRODUCTION TO ELECTRONICS: Conventional Current, Kirchhoff’s Laws, Magnetic Fields, and the Right-Hand Rule”
MAGNETISM AND ELECTROMAGNETISM: Elementary Particle Accelerator Design
The perpendicular force ( FB ) acting upon a positively charged particle moving with a constant velocity ( v ) gives rise to interesting and practical real-world applications: As the equation shows, the magnitude of this force is greatest when it travels through a magnetic field ( B ) at a 90o angle. As aContinue reading “MAGNETISM AND ELECTROMAGNETISM: Elementary Particle Accelerator Design”
MATHEMATICS: The Unit Circle, Sine, Cosine, and Tangent Functions
Linear momentum ( p ) will be maximally conserved when two particles moving towards one another with a constant velocity ( v ) along a straight line collide: p1i + p2i = p’1f + p’2f Things become somewhat more complicated when some measurable entity is maximized or minimized when it passes through some other entityContinue reading “MATHEMATICS: The Unit Circle, Sine, Cosine, and Tangent Functions”
INTRODUCTION TO ELECTRONICS: Magnetism and the Magnetic Field
The concept of “ free space “ may be visually appealing to the senses, but this perception very rarely ( if ever ) describes any meaningful description of any region of space. This argument can easily be confirmed with objects as simple as paper clips and refrigerator magnets. Under the right conditions, seemingly magical forcesContinue reading “INTRODUCTION TO ELECTRONICS: Magnetism and the Magnetic Field“
INTRODUCTION TO ELECTRONICS: DC Motors
We have seen how a conducting wire moving with respect to an electric field ( B ) will experience forces upon its electrons. Consider the diagram below: Due to the proper ( perpendicular ) alignment of the loop and magnetic field, the maximum amount of DC current will be produced; however the voltages and currentsContinue reading “INTRODUCTION TO ELECTRONICS: DC Motors”
INTRODUCTION TO ELECTRONICS: DC Generator Fundamentals
In order to understand how DC generators produce electricity, it is crucial to understand how the relative motion of a conductor moving through a magnetic field ( B ) induces forces that put the conductor’s electrons into motion; however, prior to engaging in a discussion about electromagnetic induction, we must briefly re-examine how the magneticContinue reading “INTRODUCTION TO ELECTRONICS: DC Generator Fundamentals”
INTRODUCTION TO ELECTRONICS: Magnetic Field Intensity and Hysteresis
Please recall that the magnetomotive force ( Fm ) equation shows how the magnitude of current ( I ) flowing through ( N ) loops of wire determine how much flux ( ɸ ) is established within a metal core around which the wire is wrapped: Fm = NI It is important to remember thatContinue reading “INTRODUCTION TO ELECTRONICS: Magnetic Field Intensity and Hysteresis”
RENAISSANCE PHYSICS 