A student is having an experiment about electromagnets. What can he do to enable him to pick up more pins? I. Use an iron core. II. Remove one battery. III. Increase the voltage of... A student is having an experiment about electromagnets. What can he do to enable him to pick up more pins? I. Use an iron core. II. Remove one battery. III. Increase the voltage of the battery used. IV. Reduce the number of coils around the rod.
Understand the Problem
The question is asking which options a student should choose to enable an electromagnet to pick up more pins. It provides several actions and requires us to evaluate their impact on the strength of the electromagnet.
Answer
Use an iron core and increase the voltage of the battery.
Using an iron core and increasing the voltage of the battery will enable the student to pick up more pins with the electromagnet.
Answer for screen readers
Using an iron core and increasing the voltage of the battery will enable the student to pick up more pins with the electromagnet.
More Information
Using an iron core enhances the magnetic field strength, while increasing the battery voltage boosts the electric current, thus increasing the electromagnet's strength.
Tips
A common mistake is removing a battery or reducing the number of coils, both reducing the strength of the electromagnet.
Sources
- The Strength of an Electromagnet | Science Project - sciencebuddies.org
- Questions and Answers - How do I make an electromagnet? - education.jlab.org
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