A long straight wire carrying a current of 2.13 A moves with a constant speed v to the right. A 120 turn circular coil of diameter 1.50 cm, and resistance of 3.25 pn, lies stationary in the same plane as the straight wire. At some initial time the wire is to the left of the coil at a distance d = 14.0 cm from its center. 5.00 s later, the wire has moved to the right of the coil and is at a distance d from the center of the coil. You may assume for simplicity that the magnetic field is uniform in the region of the coil. Initial situation Final situation (a) what is the direction the induced current in the coil as the wire moves toward the coil, in the initial situation? O clockwise O counterclockwise O no current (b) What is the direction of the induced current in the coil as the wire moves away from coil, in the final situation? O clockwise O counterclockwise O no current (c) What is the magnitude of the average induced current in the coil over the 5.00 s interval?

A coil of wire with N = 198 turns sits with its normal parallel to a B = 0.596 T magnetic field. The coil has a radius of r = 0.0439 m. If the coil experiences a torque of τ = 0.809 N·m, how much current (I) runs through the coil?

A long straight wire carrying a current of 2.40 A moves with a constant speed v to the right. A 5 turn circular coil of diameter 12.5 cm, and resistance of 3.25 µΩ, lies stationary in the same plane as the straight wire. At some initial time the wire is to the left of the coil at a distance d = 3.00 cm from its center. 5.00 s later, the wire has moved to the right of the coil and is at a distance d from the center of the coil. What is the magnitude and direction of the induced current in the coil? magnitude:                mA

The figure shows a rod of length L = 12.8 cm that is forced to move at constant speed v = 5.80 m/s along horizontal rails. The rod, rails, and connecting strip at the right form a conducting loop. The rod has resistance 0.581 0; the rest of the loop has negligible resistance. A current i = 140 A through the long straight wire at distance a = 13.8 mm from the loop sets up a (nonuniform) magnetic field throughout loop. Find the (a) magnitude of the emf and (b) current induced in the loop. (c) At what rate is thermal energy generated in the rod? (d) What is the magnitude of the force that must be applied to the rod to make it move at constant speed? (e) At what rate does this force do work on the rod? a 1 X X P . . X x X x X x • . @ • • . . ● Thank . 0 . • . Xi 150 B .

A long solenoid has 1400 turns per meter of length, and it carries a current of 3.8 A. A small circular coil of wire is placed inside the solenoid with the normal to the coil oriented at an angle of 90.0° with respect to the axis of the solenoid. The coil consists of 50 turns, has an area of 1.2 × 10-³ m², and carries a current of 0.40 A. Find the torque exerted on the coil. T=

A long, straight wire carrying a current of 3.33 A moves with a constant speed v to the right. A 5-turn circular coil of diameter 12.5 cm, and resistance of 3.25 pn, lies stationary in the same plane as the straight wire. At some initial time the wire is at a distance d = 7.30 cm from the center of the coil. 4.87 s later, the wire is at a distance 2d from the center of the coil. What is the magnitude and direction of the average induced current in the coil? magnitude mA direction ---Select-- 2d initial situation final situation

In the figure below, an iron bar sitting on two parallel copper rails, connected to each other by a resistor, is pulled to the right with a constant force of magnitude F = 1.25 N. The friction between the bar and rails is negligible. The resistance R = 8.00 02, the bar is moving at a app constant speed of 2.25 m/s, the distance between the rails is e, and a uniform magnetic field B is directed into the page. R i (a) What is the current through the resistor (in A)? 0.5929 A Fapp (b) If the magnitude of the magnetic field is 2.60 T, what is the length / (in m)? 0.81 m (c) What is the rate at which energy is delivered to the resistor (in W)? 2.812 ✓ W (d) What is the mechanical power delivered by the applied constant force (in W)? W What If? Suppose the magnetic field has an initial value of 2.60 T at time t = 0 and increases at a constant rate of 0.500 T/s. The bar starts at an initial position x = 0.100 m to the right of the resistor at t = 0, and again moves at a constant speed of 2.25…

A solenoid is 15 cm long, has a radius of 5 cm, and has 400 turns. If it carries a current of 4 A, the magnetic energy stored in the solenoid is Group of answer choices 12.6 mJ 84.2 mJ 0.562 J 3.37 J None of these is correct.