Strength of a pulsed electromagnetic field
If you are trying to attract an object magnetically, the magnetic force from an electro-magnet is: -

Force \$= \dfrac{(F_M)^2\mu_0\cdot A}{2 g^2}\$

Where 


Fm is the product of amps and turns
A is the cross sectional area of the solenoid
\$\mu_0\$ is \$4\pi\times 10^{-7}\$
g is the gap to the magnetizable object you wish to attract


Note that Fm is governed by amps and turns.