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.

In Figure (a), a circular loop of wire is concentric with a solenoid and lies in a plane perpendicular to the solenoid's central axis.The loop has radius 6.19 cm. The solenoid has radius 2.13 cm, consists of 8250 turns/m, and has a current isol varying with time t as given in Figure (b), where the vertical axis scale is set by i, - 1.16 A and the horizontal axis scale is set by t, - 2.5 s. Figure (c) shows, as a function of time, the energy Eth that is transferred to thermal energy of the loop; the vertical axis scale is set by E,- 102.6 nJ. What is the loop's resistance? t (s) t (s) (a) (b) (c) Number i Units (ru) "7 (v) P

(Figure 1) shows a 1.0-cm-diameter loop with R = 0.50 inside a 2.0-cm-diameter solenoid. The solenoid is 8.0 cm long, has 130 turns, and carries the current shown in the graph. A positive current is cw when seen from the left. Figure 2.0 cm 1.0 cm L(A) 0.5- I 0 -0.5- 1 of 1 0.01 0.02 Part A Determine the current in the loop at t = 0.010 s? Express your answer with the appropriate units. I= 0 Submit μÀ Provide Feedback A Previous Answers Request Answer ? X Incorrect; Try Again; 9 attempts remaining

3. A solenoid has radius 5.80 mm, length 11.0 cm, 5000 turns, and is placed with its axis of symmetryalong the x-axis, through the origin. A vector normal to the opening of the solenoid points to the right.We measure the resistance of the solenoid to be 14.0 Ω. The solenoid is in a region where thetemperature is 49.0°C and initially, there is an external magnetic field of 0.30 T in the +x direction.Then the magnetic field is turned off and drops to 0 T over 50.0 milliseconds.a. What is the magnitude of the average induced emf during the 50.0 milliseconds while the magneticfield magnitude decreases to 0?________________________b. What is the direction of the induced current, as viewed from the right? Answer clockwise,counterclockwise, or zero and show work or explain in words.________________________c. What is the magnitude of the induced current? ________________________d. What is the magnitude and direction of the induced magnetic field?