Magnetic Field Strength (B) Telsa (T) = 1 N/A m Gauss = 10 -4 T
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Transcript of Magnetic Field Strength (B) Telsa (T) = 1 N/A m Gauss = 10 -4 T
![Page 1: Magnetic Field Strength (B) Telsa (T) = 1 N/A m Gauss = 10 -4 T](https://reader035.fdocuments.us/reader035/viewer/2022070401/5681368e550346895d9e174a/html5/thumbnails/1.jpg)
Magnetic Field Strength (B)
Telsa (T) = 1 N/Am
Gauss = 10-4 T
Magnetic Force on a moving charge
FB = |q|vBSin
X (Directed into the page)
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+q
B
X X X
X X X
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+q
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E
X
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B
-q
A charge of –q is shot into a region of E = 20,000 N/C and B = -.50T. What must be the velocity of the charge so that it is not deflected?
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+q
B
v
Describe the motion of this charge
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Magnetic Force on a current carrying wire
I I
FB = ILBsin
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I B
L2
L1
Find the torque on this rectangular loop of wire
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Magnetic Fields created by current carrying wires
I
B = 0I/(2r)
0 = permeability of free space (4 x 10-7 Tm/A)
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I
e+
2 x 105 m/s
20 A
4 cm
Find the magnetic force on the proton
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I1
I2
Find the magnetic force per unit length that each wire exerts on each other.
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Motional EMF
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v
Conducting wires moving in a magnetic field
FB = qvBsin
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= vBL
X
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v
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Faraday’s Law of Electromagnetic Induction: The magnitude of the induced EMF is equal to the rate of change of magnetic flux through the circuit.
Magnetic Flux B = BAcos
= -dB/dt
B B
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Lenz’s Law: When magnetic flux is changing, an induced current will occur to oppose the change in magnetic flux.
N N
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B
A coil of wire of radius 8.4 cm is rotating in a magnetic field of 0.75 T. If it starts and an angle of 0 degrees and rotates to and angle of 45 degrees in 1.5 sec, find the magnitude of the induced voltage. What direction will the current flow in the wire?
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+
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E
X
X
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X
X
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B
q
A charge of q is shot into a region of E = 15000 N/C and B = .85T. What must be the velocity of the charge so that it is not deflected?
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I1
I2
Find the magnetic force per unit length that each wire exerts on each other.
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V d = 7.5 cm
A conducting wire is moving with a velocity of 0.35 m/s in a magnetic field of 0.90 T. Find the magnitude of the induced EMF and the electric field. Determine the direction of the electric field
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B
I
Determine the direction that this loop of wire will spin.
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I = 12A
Determine the magnitude of the magnetic field generated by the wire below at a point 6.5 cm from the wire. Make a sketch to indicate the direction of the magnetic field.
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