Question

Charlotte built a simple electromagnet, shown to the left. She found that the electromagnet picked up the entire pile of paper clips the instant she turned it on. Which of the following might allow Charlotte's electromagnet to pick up a single paper clip at a time? (Choose 2) increasing the number of batteries supplying voltage to the electromagnet increasing the number of loops in the electromagnet's coil removing the iron nail from the core of the electromagnet increasing the distance between the electromagnet and the paper clips

Answers

GPT-4o mini
To allow Charlotte's electromagnet to pick up a single paper clip at a time, the following two options would be most effective:

1. **Increasing the number of batteries supplying voltage to the electromagnet**: This would increase the strength of the electromagnet, allowing it to have more control over which paper clips it picks up.

2. **Increasing the number of loops in the electromagnet's coil**: More loops in the coil create a stronger magnetic field, allowing for a more controlled and stronger electromagnet, which can improve the ability to pick up lighter objects, such as a single paper clip.

The other options would not help in this scenario:
- **Removing the iron nail from the core** would weaken the electromagnet.
- **Increasing the distance between the electromagnet and the paper clips** would also make it less effective at picking them up.

So, the two correct choices are:
1. Increasing the number of batteries supplying voltage to the electromagnet
2. Increasing the number of loops in the electromagnet's coil

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