Two parallel wires carry currents travelling in opposite directions. The wires are separated by a distance of 1.37 cm. A Hall sensor is placed in the plane of the wires, a distance 9.00cm to the right of the right wire, carrying a current 2.87A. What is the magnitude of the current (in A) in the left wire if the Hall sensor measures a magnetic field of zero Tesla.

A magnetic field has a magnitude of 0.0017 T, and an electric field has a magnitude of 6.0 x 10³ N/C. Both fields point in the same direction. A positive 1.7-μC charge moves at a speed of 4.2 x 106 m/s in a direction that is perpendicular to both fields. Determine the magnitude of the net force that acts on the charge. Number i Units t

The earth's magnetic field is about 45 micro Tesla (μT) and points approximately due north. What is the force exerted by the field on a particle with a charge of 3.0 μC that is moving due west at a speed of 250 m/s? What is the direction of the force on the particle (i.e. north, south, east, west, up or down)?

Two vectors have the following magnitude, A = 8.9 m and B = 7 m. Their vector product is:  A⨯B = -1.8 m i + 13.8 m k. What is the angle (in degrees) between the vectors A and B?

A powerful, superconductive wire carries a 5000A current directly out of this screen. An electron is travelling parallel to the wire with a speed of 5E8 m/s, in the same direction as the current. the electron is 50.0 (micrometer) to the right of the wire.  A) What is the magnitude and direction of the Magnetic field due to the superconductor at the location of the electron? B) What is the magnitude and direction of the force acting on the electron due to the superconductor's magnetic field?

9 x 1021 electrons pass through the cross-section of a wire with a cross-sectional area of 9 mm2 in 1.4 minutes. What is the magnitude of the magnetic field formed at a distance of 36 cm from this wire? (Express your answer in the unit of µT)

A beam of electrons is simultaneously influenced by an homogeneous electric field of 15600 V/m and by a homogeneous magnetic field of 4.62 x 10-3 T. Assume that both fields are perpendicular to the electron beam and to each other. Both fields have to be oriented such that they produce no deflection of the electron beam. a) Draw the relative orientations of the vectors v, E, and B and also the forces of FE and FB .b) Determine the speed of the electrons such that there is no deflection of the electron beam. c) When the electric field is switched off, what is the radius and the period of the electron orbit?

An electron and a proton, moving side by side at the same speed, enter a 0.020-T magnetic field. The electron moves in a circular path of radius 7.5 mm. Determine the radius of the proton.

An electron with a speed of 2.5 x 106 m/s moves with a circle in a plane perpendicular to a uniform magnetic field. If the radius of the circle is 2.3 cm, then what is the magnitude of the field?