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Field of a solenoid when the turns per length and the current are changed

The same question, asked 2 times: 9 May 2023 S2*, 20 Apr 2026 S1. Every wording below, oldest first.

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  1. Question 1

    9 May 2023 S2

    43
    A long solenoid carrying a current produces magnetic field B along its axis. If the number of turns per cm are tripled and the current is made 14\frac{1}{4}th then the new value of magnetic field will be

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  2. Question 2

    20 Apr 2026 S1

    133
    A long solenoid carrying a current produces a magnetic field 'BB' along its axis. If the current is tripled and the number of turns per cm is halved then new value of magnetic field will be

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