Question
17. 2 solenoid A & B spaced closed to each other and sharing same cylindrical axis have 400 & 700 turns respectively .A current of 3.5 ampere in coil A produces an average flux of 300 micro Webber through each turns of A and flux of 90 micro webber through each turns of B .calculate 1) mutual inductance of 2 solenoids 2)self inductance of A 3) what EMF induced in B when current In A increase at rate of o.5 Ampere/second