Multiple Choice
A certain solenoid is long and has 1500 turns of wire. If the magnetic field inside the solenoid is , what is the current in the wire?
29. Sources of Magnetic Field
Magnetic Field Produced by Loops andSolenoids
Back29. Sources of Magnetic Field
Magnetic Field Produced by Loops andSolenoids
- Open QuestionA long, straight conducting wire of radius R has a nonuniform current density J = J₀r/R, where J₀ is a constant. The wire carries total current I.b. Find an expression for the magnetic field strength inside the wire at radius r.
- Multiple Choice
The single loop below has a radius of 10 cm and is perpendicular to the page (shown at a slight angle so you can better visualize it). If the magnetic field at the center is 10-6 T directed left, what is the magnitude of the current? What is the direction of the current at the top of the wire:into the page (towards left) or out of the page (towards right)?
- Multiple Choice
A long wire having total resistance of 10 Ω is made into a solenoid with 20 turns of wire per centimeter. The wire is connected to a battery, which provides a current in order to produce a 0.04 T magnetic field through the center of the solenoid. What voltage must this battery have?
- Multiple Choice
The two tightly wound solenoids below both have length 40 cm and current 5 A in the directions shown. The left solenoid has radius 20 cm and 50 m of total wire. The right solenoid has radius 0.5 m and 314 m of total wire. The thinner solenoid is placed entirely inside the wider one so their central axes perfectly overlap. Assume wires don't touch. What is the magnitude and direction of the magnetic field that is produced by a combination of the two solenoids at their central axis?
(Note:your worksheet may have a typo and say "0.5 cm"for the right solenoid's radius; it should be 0.5 m.)
- Multiple ChoiceA loop of wire has a magnetic dipole moment of . What is the on-axis magnetic field strength from the loop?
- Multiple ChoiceA square loop of wire with on a side carries a current. What is the size of its magnetic dipole moment?
- Open QuestionA solenoid is designed to produce a magnetic field of 0.0270 T at its center. It has radius 1.40 cm and length 40.0 cm, and the wire can carry a maximum current of 12.0 A. (b) What total length of wire is required?
- Open QuestionA solenoid is designed to produce a magnetic field of 0.0270 T at its center. It has radius 1.40 cm and length 40.0 cm, and the wire can carry a maximum current of 12.0 A. (a) What minimum number of turns per unit length must the solenoid have?
- Open QuestionA 15.0-cm-long solenoid with radius 0.750 cm is closely wound with 600 turns of wire. The current in the windings is 8.00 A. Compute the magnetic field at a point near the center of the solenoid.
- Open QuestionEach turn of a solenoid is a current loop with a magnetic dipole moment. Consider a 200-turn cylindrical solenoid that has an interior volume of 40 cm³ and for which each turn is a magnetic dipole moment with magnitude 8.0 x 10⁻⁴ A m². What is the magnetic field strength inside the solenoid?