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Q14. A very long solenoid has 800 turns per unit length. A current of 1.6 A flows through it. Then the magnetic induction in the middle of the solenoid on its axis is approximately: (a) 16 x 10-4 T (b) 8 x 10-4 T (c) 32 x 10-4 T (d) 4 x 10-4 T - FirstInTest | FirstInTest