A current I is passed through a wire. A second wire of length is moving perpendicular to the magnetic field generated by the first wire ( with velocity at a distance d. Write down the expression for the potential difference V between the ends of the moving wire. Consider the magnetic field B to be constant over the range of motion of the second wire

What is the direction of the magnetic force on a positive charge that moves with velocity v in a region containing magnetic field B as shown in the figure below? V O force is zero ○ up ○ left into the page O out of the page ○ right ○ down B

An electron accelerates from rest in a horizontally directed electric field through a potential difference of 87V. The electron leaves the electric field, entering a magnetic field of magnitude 0.4T directed into the page.  a.) Calculate the initial speed of the electron upon entering the magnetic field. b.) Calculate the magnitude and direction of the magnetic force on the electron  c.) Calculate the radius of the electron's circular path.

A particle with charge 0.350 C is initially traveling at 90.0 m/s along the +y-direction and encounters a magnetic field of 1.30x10-2 T along the +x-direction. Part A What is the magnitude of the force on the charge? n ΑΣφ ? F = N Submit Request Answer Part B What is the direction of the force? O +x direction -x direction +y direction O -y direction +z direction O -z direction O O O O O C

A current I is passed through a wire. A second wire of length L is moving perpendicular to the magnetic field generated by the first wire (see sketch below) with velocity v at a distance d. Consider the magnetic field B to be constant over the range / of motion of the second wire (i.e. d > 1). You need to calculate the potential generated between the ends of the second wire. Please select statements that would describe your approach to solving the problem. Wire 1 Wire 2 d a. Use an expression for the electromotive force (EMF) induced by the magnetic field. b. Use the expression for the magnetic force between two current-carrying wires. C. Use the expression for the magnetic field of a current-carrying wire.

A charged particle moves un-deflected through a region in which there is a homogeneous electric field and magnetic field as shown. The electric field points in the -x direction, and the magnetic field points into the page. What can be said about the speed of the particle? Its speed is changing Its speed is equal to E/B Its speed is zero Its speed is equal to qBr/m

a.) A wire 4 m long has a mass of 224 g. The wire is connected to an emf. What is the minimum current in the wire that would allow it to levitate above the ground in a magnetic field of magnitude0.4 T? Round your answer to 2 decimal places b.) Per previous question, what direction must the current flow?

A loop of wire is perpendicular to a magnetic field. The magnetic field strength as a function of timeis given by the top graph. Draw a graph of the current in the loop as a function of time. Let apositive current represent a current that comes out of the top of the loop and enters the bottom of theloop. There are no numbers for the vertical axis, but your graph should have the correct shape andproportions.

An electron is moving to the right when suddenly a magnetic field is switched on that points out of the page. Describe the resulting path of the electron. O a clockwise circle in the plane of the page O a circular path coming out of the page on the right and into the page on the left O a counterclockwise circle in the plane of the page O a straight line O a circular path coming out of the page on the left and into the page on the right

true or false? parts d and e only