Finals Reviewer Flashcards by bruh Unknown

Force exerted by magnets when they attract or repel each other. It is caused by the moving electric charges.

Magnetism

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Can be defined as the attractive or repulsive force that is exerted between the poles of a magnet and electrically charged moving particles.

Magnetic Force

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Is a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials.

Magnetic field

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It represents Magnetic Field by continuos line that emerge from north-seeking magnetic poles and enter south-seeking magnetic poles.

Magnetic Flux

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Is a measurement of the total magnetic field which passes through a given area. It is measured in units of Weber.

Magnetic Flux

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It is a measure of the intensity of a magnetic field in a given area of that field a measure of the intensity of a magnetic field in a given area of that field. It is represented by “H”

Magnetic Field Strength

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What is magnetic field strength typically measured in, as defined by the Intl. System of Units?

Amperes per meter (A/m)

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What is a physical constant used often in electromagnetism?

Permeability of free space

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What is the formula for Magnetic Permeability Constant?

μ0 = 4π x10-7 T • m/A

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What is the visual tool used to represent magnetic fields. They describe the direction of the magnetic force

Magnetic Field Lines

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Inside the magnet, what is the direction of the magnetic field lines?

South pole to North Pole

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TRUE OR FALSE:

Magnetic field lines always intersect with each other.

FALSE. Never

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TRUE OR FALSE:

Magnetic field lines form a closed loop.

TRUE.

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TRUE OR FALSE:

Field lines have direction and no magnitude at any point on the field.

FALSE. It has both magnitude and direction.

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TRUE OR FALSE:

Magnetic field lines in the same direction, weakens the magnetic effect.

FALSE. Strengthen.

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What is the branch of Physics, that deals with the electromagnetic force that occurs between electrically charged particles.

Electromagnetism

What is one of the four fundamental forces and exhibits electromagnetic fields such as magnetic fields, electric fields, and light.

Electromagnetic force

He calculated the speed of an electromagnetic wave and found that the speed of an electromagnetic wave was almost identical to the speed of light. (3×108 m/s)

James Clerk Maxwell

What did James Maxwell discovered with the lights?

Light was an electromagnetic wave.

He demonstated that these are the two manifestations of the same phenomenon.

Electric and Magnetic Field

He demonstrated that the electromagntic waves predicted by James Maxwell actually exist.

Heinrich Hertz

It states that the total electric flux out of a closed surface is equal to the charge enclosed divided by the permimttivity.

Gauss Law

It is defined as the combination of the magnetic and electric force on a point charge due to electromagnetic fields.

Lorentz Force

It is the opposition to alternating current presented by the combined effect of resistance and reactance in a circuit

Impedance

It is an electric circuit composed of resistors and inductors drived by a voltage or current source.

Resistor-Inductor Circuit (RL)

It is a type of electric circuit that is made up of an inductor which is expressed by the letter L and a capacitor represented by the letter C.

LC Circuit

The ENTIRE range of EM waves in order of increasing frequency and decreasing wavelength.

EM spectrum

What happens to the wavelengths and frequencies, as you go from left to right of the inverse relationship between size and frequency?

Wavelengths get smaller and Frequencies get higher.

What has the longest wavelength and lowest frequency; with its wavelength ranging from 1000s of meters to .001 m? USED IN: RADAR, Cooking food, satellite transmission

Radio waves

What has a shorter wavelength, from .001 m to 700 nm, and has a higher frequency. USED IN: TV remote control devices

Infrared waves (heat)

What has the wavelength that (red light) and 30 nm (violet light) with frequencies higher than infrared waves and a very small part of the EM spectrum?

Visible light

What has the wavelength that ranges from 400 nm to 10 nm; its frequency (and therefore energy) high enough penetrating living cells and cause them damages.

Ultraviolet Light

What has the wavelength from 10 nm to .001 nm that has rays with enough to penetrat deep into tissue?

X-Rays

What ray carries the most energy and shortest wavelengths, less than one trillionth of a meter (10-12) that needs a 3-4 ft. thick concrete wall to stop them?

Gamma rays