What the field inside an ideal solenoid depends on

The same question, asked 2 times: 9 May 2023 S1, 19 Apr 2026 S2. Every wording below, oldest first.

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Question 1
9 May 2023 S1
24 $The magnetic induction due to an ideal solenoid is independent of$
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Question 2
19 Apr 2026 S2
133 $The magnetic induction produced inside an ideal solenoid, depends on which of the following quantities ? (a) number of turns per unit length. (b) radius of the wire. (c) current flowing throught it. (d) permeability of the medium.$
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