A conducting rod spans a gap of length L = 0.215 m and acts as the fourth side of a rectangular conducting loop, as shown in the figure. A constant magnetic field B = 0.75 T pointing into the paper is in the region. The rod is moving under an external force with an acceleration a = At2, where A = 5.5 m/s4. The resistance in the wire is R = 125 Ω.  L = 0.215 m B = 0.75 T A = 5.5 m/s4 R = 125 Ω A.  Calculate the numerical value of I at t = 2s in A.  I(t=2s) =

In the figure (Figure 1) a conducting rod of length L = 40.0 cm moves in a magnetic field B of magnitude 0.410 T directed into the plane of the figure. The rod moves with speed v = 5.60 m/s in the direction shown. Part F What is the potential difference across the rod if it moves parallel to ab? Express your answer in volts. Figure < 1 of 1 ? V = 0.91 V B х ах

c. What is the resistance of the coil given that the diameter of the wire is 2.00 mm? (Recall, resistance of wire is given by R = ρL/A, where ρ is the resistivity of the metal, L is the length of the wire, and A is the cross-sectional area.)

A the moving rod has a resistance of 0.25 Ω and moves on rails 20.0 cm apart. The stationary U-shaped conductor has negligible resistance. When a force of 0.410 N is applied to the rod, it moves to the right at a constant speed of 1.50 m/s. What is the magnetic field?

The slide generator in the figure below is in a uniform magnetic field of magnitude 0.0500 T. The bar of length 0.390 m is pulled at a constant speed of 0.500 m/s. The U-shaped conductor and the bar have a resistivity of 2.75 x 10-80 m and a cross-sectional area of 9.50 x 10-4 m². Find the current in the generator when x = 0.680 m. (Note that the A in the image below is the area of the loop, not the cross-sectional area of the conductor and bar.) A Bulb is unlit. A. B. Bulb is lit. O O O O( O O a G O O O O ܥܘ O O O O OG O O O O O O B BO Ā OOO O B₁ I loop O 0 0 O X F O • O O O O mech O O Activate Windows Go to Settings to activate Windows.

The two wires shown in the figure below are separated by d = 10.4 cm and carry currents of I = 5.40 A in opposite directions. Two vertical, parallel wires are separated by a distance d. To the left of the left wire is an arrow labeled I pointing up. To the right of the right wire is an arrow labeled I pointing down. A point P2 is a distance 2d to the left of the left wire, and a point P1 is a distance d to the right of the right wire. (a) Find the magnitude and direction of the net magnetic field at a point midway between the wires. magnitude      ?T direction              (b) Find the magnitude and direction of the net magnetic field at point P1, 10.4 cm to the right of the wire on the right. magnitude      ?T direction              (c) Find the magnitude and direction of the net magnetic field at point P2, 2d = 20.8 cm to the left of the wire on the left. magnitude      ?T direction

A circuit is made with a resistor of resistance 25 ohms and a movable bar with length 15 cm moving to the left with speed 8 m/s. The whole circuit is in a magnetic field B = 1.5 T (into page). Use this set up to answer the following questions. What is the magnitude (no negative answers) of the power delivered to the resistor in watts? Answer to 4 decimal places.

You've decided to make a magnetic projectile launcher for your science project. An aluminum bar of length l = 5.19 cm slides along metal rails through a magnetic field B = 0.664 T. The switch closes at t = 0 s , while the bar is at rest, and a battery of emf = 16.50 V starts a current flowing around the loop. The battery had internal resistance, r = 0.139 Ω. The resistance of rails and the bar are effectively zero. What is the terminal speed (in m/s) of the bar?

You wish to construct a solenoid with a diameter of 2.00 cm that will produce a magnetic field of 3.40 x 10-2T at its center when a current of 12.0 A is passing through the coils. You want the resistance of the coil wire to be 5.80 N. The resistivity of the wire used is 1.70 x 10-8 N •m (at 20.0°C), and you are using a wire that has a cross sectional area of 3.14 × 10-8 m2. (Note that this solenoid may not necessarily be so tightly wound that the adjacent loops of wire will touch each other. Nonetheless, you may assume that it behaves like an ideal solenoid.) Determine the following. (a) number of turns needed on the solenoid turns (b) length of the solenoid