In the figure, a rectangular loop of wire with length a = 3.1 cm, width b = 2.0 cm, and resistance R = 0.74 mQ is placed near an infinitely long wire carrying current i = 4.0 A. The loop is then moved away from the wire at a constant speed v = 4.7 mm/s. When the center of the loop is at distance r = 3.0 cm, what are (a) the magnitude of the magnetic flux through the loop and (b) the current in amperes induced in the loop? (a) Number i Units nWb (b) Number Units HA

Two wires AC and BC are attached to a 7 Kg sphere that It rotates at constant speed v in the horizontal circle shown in the figure. Yes θ1 = 55° and θ2= 30 ° and d 1.4 m, determine the range of values of v for which both wires are held taut.

A long, straight wire carrying a current of 3.13 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 µ, lies stationary in the same plane as the straight wire. At some initial time the wire is at a distance d 8.35 cm from the center of the coil. 5.10 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? mA magnitude direction ---Select--- O initial situation 2d final situation

A loop of wire with radius r= 0.183 m is in a magnetic field of magnitude B as shown in the figure. The magnetic field is perpendicular to the plane of the loop. B changes from B1= 0.22 T to B2= 7.5 T in Δt = 7.5 s at a constant rate. (a)  Express the magnetic flux Φ going through a loop of radius r assuming a constant magnetic field B.  (b)  Express the change in the magnetic flux going through this loop, ΔΦ, in terms of B1, B2 and r.  (c) Express the magnitude of the average induced electric field, E, induced in the loop in terms of ΔΦ, r and Δt.

L R = 5.00 Q X Xix x 1 |X X X X R P = FexV =8.50 J/s Fext W X xx x X X X X X X X X A rectangular wire loop of length L, width w, is pulled out of a constant, uniform magnetic field with constant velocity v. The loop has a resistance R. The magnetic field of magnitude B, points into the plane of the paper, and is confined to the rectangular region shown above. Work must be done on the loop at the rate of P, to move it through the magnetic field at constant velocity. Find the magnitude of the emf, & and the current I for the loop.

A closely wound solenoid 80 cm long has 5 layers of windings of 400 turns each. The diameter of the solenoid is 1.8 cm. If the current carried is 8.0 A, estimate the magnitude of B inside the solenoid near its centre.