Physics 2: Electromagnetic Induction
A region of the rectangular wire loop shown below sits in a uniform magnetic field directed into the page, = 7.0 T. The coil is being pulled to the right (shown in blue) at a velocity of 3 m/s. Note that the loop is being pulled into a region that does not contain a magnetic field. Find the:
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C. Force required to pull the wire loop at constant velocity
A magnetic field increases with time as described by the function, B(t) = 4 + 6t. Given a coil with 880 turns, N = 880, and an area A = (.05m), find the induced voltage in the coil.
As a steel guitar string vibrates, the component of the magnetic field perpendicular to the area of a pickup coil nearby is given by B(t) = 50 mT + (3.20 mT) Sin (1046t). The circular pickup coil has 30 turns, a radius of 2.70 mm, and a resistance of 0.10 . What is the magnitude of the maximum current induced in the coil?
A square coil, with dimensions l = 12.0 cm, w = 7.0 cm, is placed d = 3.0 cm above a wire that carries a current of 30.0 A. Find the magnetic flux through the wire.
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A rectangular wire loop rests in a magnetic field as shown. Points Y and Z are grasped and pulled tight so that the area of the loop becomes zero. Determine the direction of the current through the resistor.
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A circular loop of wire is moving downwards towards a magnet as shown below. Find the direction of the induced current (viewed from above) as:
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A. the loop approaches the north pole
B. the loop moves past the south pole
A conductive ring is falling through a magnetic field as shown below.
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A. Sketch the direction of the induced current at each location
B. Where is the induced current the greatest?
Find the direction of the induced current in the resistors.
A.
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The magnet is being pulled away in the direction of the arrow
B.
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When the current, I, is increasing with time.
A metal rod is moved to the right through a magnetic field. A charge separation is induced as shown below. Determine the direction of the magnetic field.
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A current carrying loop has a radius of 3 cm. The current is 7 A in the counter clockwise direction. Find the magnetic dipole moment,
The wire depicted below has a current I = 25.0 A, r = 9.0 cm and r = 6.0 cm. Find the magnetic dipole moment .
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The circuit below is a square with sides L and is placed in a magnetic field directed into the screen. Attached to the circuit are two light bulbs of resistance R . The magnetic field is described by the function B(t) = at + b. What is the current in the circuit and in what direction does it flow. Also how much power is dissipated in light bulb 1.
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The circuit below is set in a uniform magnetic field that is going into the page. The circuit is attached to a moving conducting bar, shown in blue, below. The result is the circuit has a fixed length L and an increasing width of X. Find the induced current as a function of the velocity of the bar in the direction shown.
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The solenoid depicted below has a diameter, = 10 cm, and initial = 40 mT. Due to an increasing current, the field increases at 7 . Determine the magnitude and direction of the induced electric field at a radius of r = 3 cm within the solenoid.
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The solenoid depicted below has a diameter, = 10 cm, and initial = 40 mT. Due to an increasing current, the field increases at 7 . Determine the magnitude and direction of the induced electric field at a radius of r = 9 cm (this is outside of the solenoid).
![](/old/images/solenoid.gif)