A20.0 cm × 20.0 cm square loop of wire lies in the xy-plane with its bottom edge on the x-axis. the resistance of the loop is 0.550 ω . a magnetic field parallel to the z-axis is given by b = 0.760 y2t, where b is in tesla, y is in meters, and t is in seconds. what is the size of the induced current in the loop at t = 0.480 s ?

a solenoid is created by wrapping a l = 90 m long wire around a hollow tube of diameter d = 4.5 cm.   the wire diameter is d = 0.9 mm.   the solenoid wire is then connected to a power supply so that a current of i = 9 a flows through the wire.

randomized variablesl = 90 m

d = 4.5 cm

d = 0.9 mm

i = 9 a                                          

write an expression for the number of turns, n, in the solenoid. you do not need to take into account the diameter of the wire in this calculation.

calculate the number of turns, n, in the solenoid.

write an expression for the length of the solenoid (l2) in terms of the diameter of the hollow tube d.

calculate the length of the solenoid (l2)   in meters.

calculate the magnitude of the magnetic field at the center of the solenoid in teslas.

explanation:

i think the answer would be b