The self inductance L of a solenoid of length l and area of cross section A, with a fixed number of turns N increases as
The self inductance L of a solenoid of length l and area of cross section A, with a fixed number of turns N increases as
(a) l and A increase.
(b) l decreases and A increases.
(c) l increases and A decreases.
(d) both l and A decrease.
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