Jessica's kettle is old and a bit temperamental. She decided to buy a new smarter plastic kettle. On starting the wire Jessica noticed that her new kettle has only two wires . The wire that would be connected to a pin named A was missing. I. Give the possible name of the pin A?
ii. What is the purpose of the wire attacked to pin A.
iii. Explain why this wire is not necessary for her new kettle.

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:

a and b sometimes have a positive value

answer; how far out of place which the object finished relative to the starting location;