Prob. 4 A 1.2m-long metal bar is pulled to the right at a steady rate of 2.5m/s perpendicular to auniform, 1.50T magnetic field. The bar rides on a pair of conducting, parallel rails connectedthrough a resistance R = 7.5N so the apparatus forms a complete electrical circuit. Ignore theresistance of the bar and the rails and all gravitational effects.[b]What is the magnitude of the induced current (in units of A)?

Prob. 4 A 1.2m-long metal bar is pulled to the right at a steady rate of 2.5m/s perpendicular to a uniform, 1.50T magnetic field. The bar rides on a pair of conducting, parallel rails connected through a resistance R = 7.50 so the apparatus forms a complete electrical circuit. Ignore the resistance of the bar and the rails and all gravitational effects. [b]What is the magnitude of the induced current (in units of A)?

Prob. 4 A 1.2m-long metal bar is pulled to the right at a steady rate of 2.5m/s perpendicular to a uniform, 1.50T magnetic field. The bar rides on a pair of conducting, parallel rails connected through a resistance R = 7.50 so the apparatus forms a complete electrical circuit. Ignore the resistance of the bar and the rails and all gravitational effects. [b]What is the magnitude of the induced current (in units of A)?

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A loop of wire in the shape of a rectangle of width w and length L and a long, straight wire carrying a current I lie on a tabletop as shown in the figure below. i (a) Determine the magnetic flux through the loop due to the current I. (Use any variable stated above along with the following as necessary: μ.) $B= (b) Suppose the current is changing with time according to I = a + bt, where a and b are constants. Determine the magnitude of the emf (in V) that is induced in the loop if b = 18.0 A/s, h = 1.00 cm, w = 15.0 cm, and L = 1.10 m. (c) What is the direction of the induced current in the rectangle? O clockwise O counterclockwise O The magnitude is zero. What If? Suppose a constant current of I = 6.00 A flows in the straight wire and the loop moves from an initial position ho = 1.00 cm toward the bottom of the figure at a constant speed of v = 22.0 cm/s. (d) What is the magnitude of the induced emf (in V) in the loop 1.00 s after it begins to move? (e) What is the direction of the…
A conducting bar of length { moves to the right on two frictionless rails as shown in the figure below. A uniform magnetic field directed into the page has a magnitude of 0.290 T. Assume R = 8.70 Q and { = 0.370 m. Bin R (a) At what constant speed should the bar move to produce an 8.20-mA current in the resistor? m/s (b) What is the direction of the induced current? O clockwise O counterclockwise O into the page O out of the page (c) At what rate is energy delivered to the resistor? (d) Explain the origin of the energy being delivered to the resistor.
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3. 3. a) 3. b) 3. c) 8 Ø Ø Ø 8 Ø As shown in the figure below, a conductor bar starts from rest and slides vertically down along a conductor track while maintaining good contact. The uniform magnetic field is 0.207 in the whole space. The width of the track is 0.50m. The mass of the bar is 0.10kg. The resistance of the track is negligible, but the resistance of the bar is 3.02. For all calculations below, ignore air resistance and friction. Calculate the induced current in the bar when the bar reaches a constant falling speed under the combined influence of its gravity and the magnetic force. Calculate the constant speed at which the bar can fall under the combined influence of its gravity and the magnetic force. Describe the energy conversion in the process, and show that your results from parts (a) and (b) agree with the conservation of energy. Ø Ø Ø Ø
Only part B and D
3. In Figure 2, a metal wire of mass m = 24.1 mg can slide with negligible friction on two сan horizontal parallel rails separated by distance d = 2.56 cm. The track lies in a vertical uniform magnetic field of magnitude 56.3 mT. At time t = 0, device G is connected to the rails, producing a constant current i = 9.13 mA in the wire and rails (even as the wire moves). At t = 61.1 ms, what are the wire's speed and direction of motion (left or right)? B m Figure 2