2.5 Electromagnetism

Front

The interaction between electricity and magnetism has been an important topic in 20th century science. Which term describes this interaction?

Back

electromagnetism

Front

What is the best word to describe a system in which a magnet moves in a coil of wire to produce electricity?

Back

generator

Front

Which of the following best describes how a powerful electromagnet could be used in a junkyard? Options: It could move heavy objects made of iron., It could convert electrical energy into mechanical energy., It could light up the area so workers can see at night., It could provide a voltage source for old electronic equipment.

Back

It could move heavy objects made of iron.

Front

What could Daniel do to cause electric current to flow through the wire shaped into a coil? Options: shake the wire very quickly, submerge the wire into a pan of hot water, move a bar magnet in and out of the wire coil, connect the two free ends of the wire so that they form a closed path

Back

move a bar magnet in and out of the wire coil

Front

Which devices directly use electromagnetism to function? Options: a magnet and a battery, a galvanometer and a generator, a wire and a magnet, a loop of wire and a generator

Back

a galvanometer and a generator

Front

Which of the following describes the most likely application of electromagnetism in a power plant? Options: Magnets detect the presence of electric currents in nature., Magnets covert electric energy into mechanical energy., Moving a magnet in a coil of wire generates an electric current., Moving a magnet in a coil of wire produces visible light.

Back

Moving a magnet in a coil of wire generates an electric current.

Front

Which of the following is the best definition of electromagnetism? Options: the use of electricity to create magnets, the use of magnets to generate electricity, the interaction between electricity and magnetism, the appearance in nature of objects that have both electric and magnetic fields

Back

the interaction between electricity and magnetism

Front

Which phenomenon is most directly responsible for Earth's magnetic field? Options: Earth's rotation about its axis, Earth's revolution around the sun, the moon's revolution around Earth, the moon's gravitational pull on Earth

Back

Earth's rotation about its axis

Front

A(n) _________ is coil of wire that produces a magnetic field when it carries an electric current.

Back

solenoid

Front

A(n)_________ changes mechanical energy into electrical energy by means of electromagnetic induction.

Back

generator