More current makes a electromagnet.
longer
stronger
weaker

The scientific method is1)make an observation. scientists are naturally curious about the world. 2)form a question. after making an interesting observation, a scientific mind itches to find out more about it. .3).form a hypothesis. 4)conduct an experiment. 5)analyse the data and draw a conclusion.

Left and right, basically as long as the charge is in line with the field then it can’t except any force on the charge because the equation b*i*l sin (angle) basically the angle would be zero making total force zero.