Question

Use the table of information about four electromagnets to answer the question.
Electromagnet Current Intensity Number of Turns in the wire

W medium 10

X low 10

Y medium 50

Z low 50
Which electromagnet will produce the strongest magnetic force?
A. Electromagnet W
B. Electromagnet X
C. Electromagnet Y
D. Electromagnet Z

Answer 1

C. Electromagnet Y

Magnetic field strength of a solenoid is proportional to the product of current (I) and number of turns (N). Y has a medium current and the most turns (50), so N·I is largest for Y.