Two long, single layered solenoids 'a' and 'b' have the same length an – McqOptions

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1.	Two long, single layered solenoids 'a' and 'b' have the same length and the same number of turns. The cross sectional areas of two are'xa' and 'xb', respectively, with xb < xa. They are placed coaxially, with solenoid 'b' placed within the solenoid 'a'. Determine the coefficient of coupling between them.
A.	\(\sqrt {\dfrac{X_b}{X_a}}\)
B.	\(\sqrt {\dfrac{X_a}{X_b}}\)
C.	1
D.	0
Answer» C. 1

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