Recently you visited an elderly relative for a week's holiday. After the visit, you decide to write a letter to a friend about your holiday. Your letter should be between 150 and 200 words long. Do not write an address. In your letter you should: • explain one problem that occurred • say what you did about it • describe your feelings about the visit You will receive up to 9 marks for the content of your letter and up to 9 marks for the style and accuracy of you laanguage. Give the answer for this question.

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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: