Quick Answer: Why does a transformer not work with direct current DC )? Quizlet?

How does a generator create current quizlet?

How does a generator produce an electric current? It rotates a coil of wire through a magnetic field. … When either of them is moving there will be a change in the magnetic field in the coil and the changing magnetic field is what induces and electric current in the wire.

Why does a magnet exert a force on another magnet when the two magnets are not in contact?

1. Why does a magnet exert force on another magnet when the two magnets are not in contact? The magnetic field from north to south increases when they’re closer together, and when they repel the repelling force increases as well. This is all due to the magnetic field.

Why do we use alternating current to power homes and factories rather than direct current quizlet?

What is the concept of Natural Selection? They convinced investors that alternating current (AC) electricity was more efficient and reliable to use in factories and homes than was direct current (DC).

Can a transformer be used to transform direct voltage and direct current?

Transformers “transform” voltage from one level to another by means of electromagnetic inductance, but to change from alternating current to direct one uses a device termed a rectifier. … Voltage and current are not the same thing, of course.

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Does a simple generator produce a steady direct current explain?

Just as a simple DC electric motor uses direct current (DC) electricity to produce continual, rotary motion, so a simple DC generator produces a steady supply of direct current electricity when it spins around. … Each time it rotates through a half-turn, the current it generates reverses.

Why does a magnet exert a force on an electric current?

Why does a magnet exert a force on another magnet when the two magnets are not in contact? The forces of attraction field of magnets are due to microscopic currents of electrically charged electrons orbiting nuclei and the intrinsic magnetism of fundamental particles (such as electrons) that make up the material.

What would happen if you stroke an iron nail with a magnet?

After stroking the iron nail repeatedly with a magnet, the iron nail will become a magnet. We say that the iron nail has been magnetised. The greater the number of strokes you give the iron nail, the stronger its magnetism. … Iron filings are attracted to the magnetized iron nail.

Why are only certain materials magnetic?

Magnetism is caused by the motion of electric charges. Every substance is made up of tiny units called atoms. … That is why materials such as cloth or paper are said to be weakly magnetic. In substances such as iron, cobalt, and nickel, most of the electrons spin in the same direction.