Magnetic Field inside a Very Long Solenoid Learning Goal: To apply Ampere\'s law

Question

Magnetic Field inside a Very Long Solenoid Learning Goal: To apply Ampere's law to find the magnetic field inside an infinite solenoid. In this problem we will apply Ampere's law, written f BIT) dl to calculate the magnetic field inside a very long solenoid (only a relatively short segment of the solenoid is shown in the pictures). The segment of the solenoid shown in (Eigure 1) has length L, diameter D and n turns per unit length with each carrying Figure 1 of 1 Cross section of a segment of the solenoid with n turns per unit length Submit Hints My Answers Give Up Review Part Correct Part B Assume that loop B (in the Part A figure above) has length Lalong k (the zdirection). What is the loop integral in Ampere's law? Assume that the top end of the loop is very far from the solenoid (even though it may not look like it in the figure), so that the field there is assumed to be small and can be ignored. Express your answer in terms of Bin, L and other quantities given in the introduction. B. dl Submit My Answers Give Up incorrect; Try Again; 4 attempts remaining The correct answer does not depend on: po, nlt

Explanation / Answer

IT will be ( Bin.L )..since only L is along Bin,the breadth of the loop are not in the direction of B.So ans is Bin.L

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