A generator transforms

A. Potential energy into kinetic energy
B. mechanical energy into electrical energy*****
C. Magnetic energy into electrical energy
D. Friction into electrical energy

Electrical charges that are different

A. Attracts each other****
B. repel each other
C. Exist in pairs
D. Do not interact

What device transforms electrical energy into mechanical energy

A. An electromagnet
B. an electric meter***
C. A generator
D. A solenoid

A device used to open and close an electric circuit is

A. Lightbulb
Energy source
C. Switch***
D. Resistor

Please help

Those look ok to me IF you made a typo on #3 and it should read and electric motor instead of electric meter.

thanks you are right

To get the answers, we can apply some basic knowledge of physics and electricity:

1. A generator transforms mechanical energy into electrical energy. To understand this, we need to know that a generator consists of a coil of wire that rotates inside a magnetic field. As the wire coil rotates, it cuts across the magnetic field lines, inducing an electric current in the wire.

2. Electrical charges that are different attract each other. This concept can be explained by the fact that positive charges attract negative charges. This is due to the fundamental principle of electrostatics, which states that opposite charges attract each other.

3. An electric motor transforms electrical energy into mechanical energy. While the given options do not include this specific device, an electric motor is what transforms electrical energy into mechanical energy. It does this by using the principle of electromagnetism, where a magnetic field is created by an electric current, which interacts with the magnetic field produced by permanent magnets to generate rotational motion.

4. A device used to open and close an electric circuit is a switch. This is a straightforward answer as a switch is commonly used in electrical circuits to control the flow of electric current. By toggling the switch, it can either allow the current to flow (closed) or disrupt the current flow (open).

Therefore, the correct answers to the questions are:

1. B. Mechanical energy into electrical energy
2. A. Attracts each other
3. N/A (the correct answer is missing, but it should be "An electric motor.")
4. C. Switch

rewre