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30 Cards in this Set
- Front
- Back
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Similarities between magnetism formulas.
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- permitivity constant (uo)
- number of loops |
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Differences in formulas
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- Shape factor
- Current factor |
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Magnetism for a circle
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Bc = uoIN/ 2r
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Newton's third law
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a magnetic will exert a force and the other object exerts a force back
- most likely an electron |
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Force exerted on electron by magnetic field equation
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F = BILsin(B, I)
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Changing direction of _______ changes ________ _______
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current, magnetic force
note: increasing current does not change direction of magnetic force. |
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You will have the most magnetic force when the sine =
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1
(sin 90) |
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If sin = 0 or 180, what amount of magnetic force will there be?
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No magnetic force
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2nd right hand rule
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- To get direction of magnetic force, place thum in direction of conventional current.
- Place fingers in direction of magnetic field - palm points toward direction of force |
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Direction of _______ _______ is the direction of positive charge
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conventional current
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What is e in the equation
F = BeNvsin(B,I) |
charge of moving particle
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What is N in the equation
F = BeNvsin(B,I) |
number of positive charges
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Force on individual charge equation
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f = Bqvsin (B,I)
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Formula for any many charged particles
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F = BILsin(B,I)
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Formula for individual particle
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f = qvBsin(B,V)
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Velocity acceptor
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This is the velocity at which Fm = Fe.
only allows particles with certain velocity to pass through the hole the cardboard |
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Velocity acceptor equation
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V = E/B
This allows the particle to pass through the hole. Fm = Fe |
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If V > (E/B)
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Positive charge goes up
Negative charge goes down |
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If V < (E/B)
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Positive charge goes down
Negative charge goes up |
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Work for magnet
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Ws = qvBdcos(Fb, d)
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Centripetal force for magnet
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qvB = mv2/r
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qvB = mv2/r is used to find what?
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To find positive or negative charge of the particle, and the size.
q/m = v/B2rd |
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Two parallel wires carrying current in the same direction will ________ each other.
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attract
Newton's third law |
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Two parallel wires carrying current in the opposite direction will ________ each other.
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repel
Newton's third law |
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B =
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uoI/(2(pie)d)
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If the direction of conventional current is moving from the positive diode to the negative diode....
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There will be little to no resistance
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If the direction of conventional current is moving from the negative diode to the positive diode....
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there will be infinite resistance
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The _________ of the battery will determine whether the circuit has little resistance or infinite resistance
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polarity
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The high electric potential number =
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the voltage of the battery
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If you change the direction of conventional current...
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you change the order of diode use
- used in the diamond circuit thingy |
