Question
An electric current is produced using a bar magnet and a solenoid.
Which changes will cause a decrease in the electric current produced? Check all that apply.
using more wire loops in the solenoid
using fewer wire loops in the solenoid
using a stronger magnet
moving the solenoid instead of the magnet
moving the magnet more slowly
Which changes will cause a decrease in the electric current produced? Check all that apply.
using more wire loops in the solenoid
using fewer wire loops in the solenoid
using a stronger magnet
moving the solenoid instead of the magnet
moving the magnet more slowly
Answers
GPT-4o mini
To determine which changes will cause a decrease in the electric current produced when using a bar magnet and a solenoid, let's analyze each option:
1. **Using more wire loops in the solenoid** - This will increase the electric current because more loops increase the magnetic flux change when the magnet is moved. **(Not a decrease)**
2. **Using fewer wire loops in the solenoid** - This will decrease the electric current because fewer loops means less magnetic flux change when the magnet is moved. **(This will cause a decrease)**
3. **Using a stronger magnet** - This will increase the electric current since a stronger magnetic field will produce a greater change in magnetic flux when the magnet is moved. **(Not a decrease)**
4. **Moving the solenoid instead of the magnet** - This will generally produce a decrease in the current, depending on the speed and nature of the movement. However, if the solenoid is moved in a way that still changes the magnetic flux significantly, the current could still be generated. But typically, if it’s less effective at creating flux change compared to moving the magnet, it could cause a decrease. **(This could potentially cause a decrease)**
5. **Moving the magnet more slowly** - This will cause a decrease in the electric current because a slower motion results in a smaller rate of change of magnetic flux. **(This will cause a decrease)**
### Summary:
The changes that will cause a decrease in the electric current produced are:
- Using fewer wire loops in the solenoid
- Moving the solenoid instead of the magnet (potentially)
- Moving the magnet more slowly
1. **Using more wire loops in the solenoid** - This will increase the electric current because more loops increase the magnetic flux change when the magnet is moved. **(Not a decrease)**
2. **Using fewer wire loops in the solenoid** - This will decrease the electric current because fewer loops means less magnetic flux change when the magnet is moved. **(This will cause a decrease)**
3. **Using a stronger magnet** - This will increase the electric current since a stronger magnetic field will produce a greater change in magnetic flux when the magnet is moved. **(Not a decrease)**
4. **Moving the solenoid instead of the magnet** - This will generally produce a decrease in the current, depending on the speed and nature of the movement. However, if the solenoid is moved in a way that still changes the magnetic flux significantly, the current could still be generated. But typically, if it’s less effective at creating flux change compared to moving the magnet, it could cause a decrease. **(This could potentially cause a decrease)**
5. **Moving the magnet more slowly** - This will cause a decrease in the electric current because a slower motion results in a smaller rate of change of magnetic flux. **(This will cause a decrease)**
### Summary:
The changes that will cause a decrease in the electric current produced are:
- Using fewer wire loops in the solenoid
- Moving the solenoid instead of the magnet (potentially)
- Moving the magnet more slowly