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 X
B. electromagnet W
C. electromagnet Z
D. electromagnet Y
D. electromagnet Y
Electromagnet Y will produce the strongest magnetic force because it has both a medium current intensity and a higher number of turns in the wire compared to the other options.
A student connects a battery to a wire and wraps the wire around an iron nail to produce an electromagnet. Which action should the student take to increase the number of paper clips the electromagnet can pick up?
A. He should decrease the current through the wire
B. He should add another battery
C. He should reduce the number of turns
D. He should replace the iron nail with a plastic spoon
B. He should add another battery
Adding another battery will increase the current flowing through the wire, which will strengthen the magnetic field produced by the electromagnet. This, in turn, will increase the number of paper clips the electromagnet can pick up.
Which factors directly affect the magnetic force produced by an electromagnet?
A. length of core, number of turns in the wire
B. amount of current, length of core
C. number of turns in the wire, amount of current
D. amount of current, type of force
C. number of turns in the wire, amount of current
The magnetic force produced by an electromagnet is directly affected by the number of turns in the wire (number of coils) and the amount of current flowing through the wire. Increasing either the number of turns or the amount of current will increase the strength of the magnetic field generated by the electromagnet.