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static electrical device that transfers electrical energy between two or more circuits through electromagnetic induction.

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- production of an electromotive force across an electrical conductor in a changing magnetic field.
- Michael Faraday is generally credited with the discovery of induction in 1831, and James Clerk Maxwell mathematically described it as Faraday's law of induction.

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an electric current that reverses its direction many times a second at regular intervals, typically used in power supplies

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-electromechanical instrument used for detecting an electric current
-used in positioning and controlling systems

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An electric current flowing in one direction omly

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Coil of wire acting as a magnet when carrying an electric current.

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Definition- a vehicle's capacity to gain speed within a short time
Formula- a = the average ,acceleration, vf = final velocity, vi = initial velocity, tf = final time and ti = initial time. In other words, acceleration equals the change in velocity divided by the change in time.

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What does acceleration mean?

Compared to displacement and velocity, acceleration is like the angry, fire-breathing dragon of motion variables. It can be violent; some people are scared of it; and if it's big, it forces you to take notice. That feeling you get when you're sitting in a plane during take-off, or slamming on the brakes in a car, or turning a corner at a high speed in a go kart are all situations where you are accelerating.

Acceleration is the name we give to any process where the velocity changes. Since velocity is a speed and a direction, there are only two ways for you to accelerate: change your speed or change your direction-or change both.

What's the formula for acceleration?

To be specific, acceleration is defined to be the rate of change of the velocity.

What's confusing about acceleration?

I have to warn you that acceleration is one of the first really tricky ideas in physics. The problem isn't that people lack an intuition about acceleration. Many people do have an intuition about acceleration, which unfortunately happens to be wrong much of the time. As Mark Twain said, "It ain't what you don't know that gets you into trouble. It's what you know for sure that just ain't so."

The incorrect intuition usually goes a little something like this: "Acceleration and velocity are basically the same thing, right?" Wrong. People often erroneously think that if the velocity of an object is large, then the acceleration must also be large. Or they think that if the velocity of an object is small, it means that acceleration must be small. But that "just ain't so". The value of the velocity at a given moment does not determine the acceleration. In other words, I can be changing my velocity at a high rate regardless of whether I'm currently moving slow or fast.

To help convince yourself that the magnitude of the velocity does not determine the acceleration, try figuring out the one category in the following chart that would describe each scenario.

I wish I could say that there was only one misconception when it comes to acceleration, but there is another even more pernicious misconception lurking here-it has to do with whether the acceleration is negative or positive.

People think, "If the acceleration is negative, then the object is slowing down, and if the acceleration is positive, then the object is speeding up, right?" Wrong. An object with negative acceleration could be speeding up, and an object with positive acceleration could be slowing down. How is this so? Consider the fact that acceleration is a vector that points in the same direction as the change in velocity. That means that the direction of the acceleration determines whether you will be adding to or subtracting from the velocity. Mathematically, a negative acceleration means you will subtract from the current value of the velocity, and a positive acceleration means you will add to the current value of the velocity. Subtracting from the value of the velocity could increase the speed of an object if the velocity was already negative to begin with since it would cause the magnitude to increase.

Another way to say this is that if the acceleration has the same sign as the velocity, the object will be speeding up. And if the acceleration has the opposite sign as the velocity, the object will be slowing down.

What do solved examples involving acceleration look like?

A neurotic tiger shark starts from rest and speeds up uniformly to 12 meters per second in a time of 3 seconds.
What was the magnitude of the average acceleration of the tiger shark?

Start with the definition of acceleration.

Plug in the final velocity, initial velocity, and time interval.

A bald eagle is flying to the left with a speed of 34 meters per second when a gust of wind blows back against the eagle causing it to slow down with a constant acceleration of a magnitude 8 meters per second squared.
What will the speed of the bald eagle be after the wind has blown for 3 seconds?

Start with the definition of acceleration.

Symbolically solve to isolate the final velocity on one side of the equation.

Plug in the initial velocity as negative since it points left.

Plug in acceleration with opposite sign as velocity since the eagle is slowing.

Plug in the time interval during which the acceleration acted.

Solve for the final velocity.

The question asked for speed; since speed is always a positive number, the answer must be positive.

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What is acceleration? (article) | Khan Academy

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Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a free, world-class education for anyone, anywhere.

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Definition- a soft metal core made into a magnet by the passage of electric current through a coil surrounding it.
Examples-

Motors and generators

Loudspeakers and headphones

MRI machines

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Definition-strength or energy as an attribute of physical action or movement.

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Definition- a quantity having direction as well as magnitude, especially as determining the position of one point in space relative to another.

A vector, represented by an arrow, has both a direction and a magnitude

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Definition-the speed of something in a given direction.

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the rate at which someone or something is able to move or operate.

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Definition- the action or process of moving or being moved.
Examples-pushing a block is an example of linear motion, opening a door is an example of rotation motion, rotating stone with attached thread is an example of a circular motion

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attracts a body toward the center of the earth, or toward any other physical body having mass

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an electrical machine that converts electrical energy into mechanical energy.

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-an apparatus for producing gas or steam.
-Moves mechanical energy to electrical energy

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a flow of electric charge, carried by moving electrons in a wire or by ions in an electrolyte.

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-A region around a magnetic material or a moving electric charge within which the force of magnetism acts
-Jupiter has the strongest magnetic field
-also known as the field of force