Changing the current changes the ___ of an electromagnet.
Choices are:
A. strength
B. direction
C. charge
D. both a and b
1) Electromagnet
2) both a and b
3) electrical energy into mechanical energy
ytes6s
The correct answer is A. strength. Changing the current flowing through a wire can alter the magnetic field produced by the electromagnet, therefore changing its strength.
The correct answer is A. strength.
To understand why changing the current changes the strength of an electromagnet, we need to know some basic principles about electromagnets. An electromagnet is a type of magnet that is created by passing an electric current through a coil of wire. The coil of wire creates a magnetic field and magnetizes a nearby ferromagnetic material, such as iron.
The strength of an electromagnet depends on a few factors, including the number of turns in the coil, the material of the core, and the amount of current passing through the coil. When the current flowing through the coil changes, it directly affects the strength of the magnetic field produced by the electromagnet.
To increase the strength of an electromagnet, you can increase the current flowing through the coil. This is because the magnetic field produced by the coil is directly proportional to the current passing through it. For example, if you double the current, the magnetic field strength will also double.
On the other hand, if you decrease the current flowing through the coil, the strength of the magnetic field will decrease. So, changing the current allows us to adjust the strength of the electromagnet.
Regarding the other choices, changing the current does not directly affect the direction of an electromagnet's magnetic field, which is determined by the orientation of the coil and the flow of current. Also, changing the current does not affect the charge of the electromagnet. Therefore, the correct answer is A. strength.