Answer;
= 1396.83 Amperes
Explanation;
For a solenoid, B = u0 * N/L * I
u0 = 1.26 * 10^-6
B = 1.1 tesla
N/L = number of turns ÷ length of the solenoid
= 1500 ÷ 2.4
1.1 = 1.26 * 10^-6 * (1500 ÷ 2.4) * I
I = 1.1 ÷ [1.26 * 10^-6 * (1500 ÷ 2.4)]
I = 1396.83 Amperes