3 years ago

1.What is an electromagnet ?

1 answer:

4 0

An electromagnet is a soft metal core made into a magnet by the passage of electric current through a coil surrounding it

The difference between a permanent magnet and an electro magnet is that a permanent magnet is made from a "hard" magnetic material that maintains its magnetism over long periods of time. The magnetism in an electromagnet is created by current running through a coil of insulated wire that is wound around a piece of "soft"magnetic material.

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Reflected waves change their wavelength by ______ when reflected.

natita [175]

Answer:

i think its c

Explanation:

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2 years ago

Compare and contrast series and parallel circuits?

dalvyx [7]

In a series circuit, a common current flows through all the components of the circuit. While in a parallel circuit, a different amount of current flows through each parallel branch of the circuit. Whereas in the parallel circuit, the same voltage exists across the multiple components in the circuit.

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