Hey guys!! I actually used my brain for something and discovered something that might actually interest you.... Now, How to increase the strength of any solenoid of a circuit ? Well, stop scratching your heads and read this... Simply remember the BILLI formula... B- strength of magnetic field can be increased by I- Increasing the amount of current in the circuit or L- Lengthening the solenoid by increasing the no. of coils and LI- Locking Iron as a means of inducing magnetism, thus indirectly strengthening the magnetic field... Watch out, there's a lot more in store for you!!!