You have given a power supply, copper wire, and an iron nail. What should you do to decrease the strength of the electro magnet?

Three long, parallel conductors carry currents of I = 2.0 A.Figure P19.71 is an end view of the conductors, with each currentcoming out of the page. Given that a = 1.0 cm, determinethe magnitude and direction of the magnetic field atpoints A, B, and C.

Hi please help: A solenoid that is 70 cm long produces a magnetic field of 1.8 T within its core when it carries a current of 8.1 A. How many turns of wire are contained in this solenoid? Express answer using two significant figures.

An electron moves in a region where the magnetic field is uniform and has a magnitude of 80 µT. The electron follows a helical path that has a pitch of 9.0 mm and a radius of 2.0 mm. What is the speed of this electron when it moves in this region? one of these a-)48 km/s b-)28 km/s c-)20 km/s d-)35 km/s e-)8.0 km/s

A cubical magnet with volume 1 cm³ has a magnetization of 1.0. Which statement below is definitely true? (A) The magnetic dipole moment of the magnet is 1 Am² (B) The magnet is fully magnetized (C) The magnetic field of the magnet is 1 T (D) The magnetic field of the magnet is 0.001 T (E) The magnetic dipole moment of the magnet is 0.001 Am² PLEASE SHOW WORK

The copper sheet shown below is partially in a magnetic field. What happens when it is pulled to the right (select all that apply)? O The copper sheet feels an opposing force to the left Copper is a nonmagnetic material, so it is unaffected by the magnetic field The copper sheet feels a net torque in the direction parallel to its direction of motion A clockwise electric current flows in the copper sheet

A charge moves to the right and then enters a region with a uniform magnetic field as shown. If the charge follows along path 3 , what is the sign of the charge? The charge is positive The charge is negative The charge is neutral

53. A wire is formed into a circle having a diameter of w 10.0 cm and is placed in a uniform magnetic field of 3.00 mT. The wire carries a current of 5.00 A. Find (a) the maximum torque on the wire and (b) the of potential energies of the wire-field system for differ- range ent orientations of the circle.

what is the answer??! help!

Chapter 28, Problem 001 A proton traveling at 23.8° with respect to the direction of a magnetic field of strength 1.98 mT experiences a magnetic force of 9.59 × 10-¹7 N. Calculate (a) the proton's speed and (b) its kinetic energy in electron- volts. Chapter 28, Problem 009 In the figure, an electron accelerated from rest through potential difference V₁=1.06 kV enters the gap between two parallel plates having separation d = 24.5 mm and potential difference V₂= 99.1 V. The lower plate is at the lower potential. Neglect fringing and assume that the electron's velocity vector is perpendicular to the electric field vector between the plates. In unit-vector notation, what uniform magnetic field allows the electron to travel in a straight line in the gap? [₁}v₂