STAR GENERATION JISMO SPRING CAMP 2025
A student builds an electromagnet by wrapping copper wire around an iron nail and connecting it to a battery. She wants to increase its strength. Which of the following will NOT make the electromagnet stronger?
C) Using an aluminum nail instead of iron
In an experiment, students release a pendulum from different heights.
A) A higher release point increases the pendulum's speed.
Which factor will cause the greatest change in a pendulum’s time period?
C) Increasing the length of the string