A long straight wire, carrying a current I to the right, is located below a stationary rectangular conducting loop. The straight wire and loop are in the same plane, and the entire straight wire is moving downward, away from the loop, with speed v, as shown. The induced current in the stationary rectangular loop is V
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- Two circular conducting coils are lying flat on a table, as seen from above in the drawing below. The centers of the coils are at the same location. The larger of the coils contains a switch and a battery, but the smaller coil is just a continuous wire. Which one of the following statements best describes the induced current, if any, that exists in the smaller coil when the switch is closed? O A counterclockwise current will flow for a very short time in the smaller coil. O A clockwise current will flow in the smaller coil for as long as the switch is remains closed. O A counterclockwise current will flow in the smaller coil for as long as the switch is remains closed. O A clockwise current will flow for a very short time in the smaller coil. O There will be no induced current in the smaller coil.A metal wire of mass m = 0.400 kg slides without friction on two horizontal rails spaced a distance d = 0.38 m apart, as in the figure. The track lies in a vertical uniform magnetic field B= 1.20 T. There is a constant current i = 0.40 A through generator G, along one rail, across the wire, and back down the other rail. Find the speed and direction of the wire's motion as a function of time, assuming it to be stationary at t = 0. Evaluate for t = 0.3 s. Take positive to the right and negative to the left.A loop of wire lies flat on the xy plane and has a magnet above it with the north side pointed down. The magnet moves in the +z direction away from the loop. If we looked at the loop of wire from above, what is the direction of the induced current? No current is induced Counterclockwise Clockwise
- The magnetic force on the moving rod in a slidewiregenerator has magnitude 0.0600 N at an instant when theresistance of the circuit is 0.750 Ω. The rod is 0.190 m long and themagnetic field (which is perpendicular to the plane of the generator) hasmagnitude 0.550 T. Find the speed of the rod.There are two square metal frames as shown in the figure. The outer (blue) frame is fixed (not moving) and carries a counter-clockwise electric current. If the inner (red) frame begins to rotate around its axis (the red line), what is the direction of the induced current in the inner frame, right after it starts rotating?Shown below is a conducting rod that slides along metal rails. The apparatus is in a uniform magnetic field of strength 0.5 T, which is directly into the page. The rod is pulled to the right at a constant speed of 4.5 m/s by a force F→. The only significant resistance in the circuit comes from the 2-Ω resistor shown. (a) What is the voltage induced in the circuit? (b) What is the induced current? (c) What is the magnitude of F→? (d) What are the power output of F→ and the power dissipated in the resistor? Voltage of_________V is induced. An induced current of_______mA flows in_____(clockwise, counter-clockwise) direction. Force F→ of magnitude________mN is needed to maintain the constant speed. Force →FF→ does work at the rate of_________mW; power of_________mW is dissipated in the resistor.
- As shown, the rolling axle, 1.50 m long, is pushed along horizontal rails at a constant speed υ = 3.00 m/s. A resistor R = 0.400 Ω is connected to the rails at points a and b, directly opposite each other. The wheels make good electrical contact with the rails, so the axle, rails, and R form a closed-loop circuit. The only significant resistance in the circuit is R. A uniform magnetic field B = 0.080 0 T is vertically downward. (a) Find the induced current I in the resistor. (b) What horizontal force F is required to keep the axle rolling at constant speed? (c) Which end of the resistor, a or b, is at the higher electric potential? (d) What If? After the axle rolls past the resistor, does the current in R reverse direction? Explain your answer.An infinite straight wire carries current I1 = 4.3 A in the positive y-direction as shown. At time t = 0, a conducting wire, aligned with the y-direction is located a distance d = 41 cm from the y-axis and moves with velocity v = 14 cm/s in the negaitve x- direction as shown. The wire has length W = 15 cm. 1) What is ɛ(0), the emf induced in the moving wire at t = 0? Define the emf to be positive if the potential at point a is higher than that at point b. V Submit 2) What is ɛ(t,), the emf induced in the moving wire at t = tj = 2 s? Define the emf to be positive if the potential at point a is higher than that at point b. V Submit 3) The wire is now replaced by a conducting rectangular loop as shown. The loop has length L = 56 cm and width W = 15 cm. At time t = 0, the loop moves with velocity v = 14 cm/s with its left end located a distance d = 41 cm from the y-axis. The resistance of the loop is R = 1.7 Q. What is i(0), the induced current in the loop at time t = 0? Define the current…The figure below shows a cross section of an "infinitely" long solenoid (circle) that has n=18000 turns/m; the axis of the solenoid (a bold dot) is perpendicular to the plane of cross section. The radius of the solenoid, r=87 cm. A square frame with a side a=8 cm is located in the plane of cross section. The current in the solenoid is I=3.33 A and it does not change with time, the resistance of the frame is R=13 Ω. The frame is rotating at 6000 turns/min with respect to one of its sides.Find the value of the magnetic field inside the solenoid: B= T.Find the maximum value of induced e.m.f. in the frame: ℰind= V.Find the maximum value of induced current in the frame: Iind= A.