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3 years ago

5

Describe how an electromagnet can be switched on and off.

1 answer:

Phoenix [80]3 years ago

8 0

Answer:The magnetic field around an electromagnet is just the same as the one around a bar magnet. It can, however, be reversed by turning the battery around. Unlike bar magnets, which are permanent magnets, the magnetism of electromagnets can be turned on and off just by closing or opening the switch.

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Which statements describe the characteristics of a magnet? Select four options.

PolarNik [594]

Answer:

its a, c, d, and f

Explanation:

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A generator uses a coil that has 100 turns and a 0.50-T magnetic field. The frequency of this generator is 60.0 Hz, and its emf

lana [24]

Answer:

38 m

Explanation:

Number of turns=N=100

Magnetic field=B=0.50 T

Frequency of the generator=f=60 Hz

Rms value of emf= $E_{rms}=120 V$

We have to find the length of the wire from which the coil is made.

Peak value of emf= $E_0=E_{rms}\sqrt 2=120\times \sqrt 2=169.7 V$

Length of wire= $4\sqrt{\frac{NE_0}{2\pi fB}}$

Substitute the values

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Length of wire=38 m

Hence, the length of wire from which the coil is made=38 m

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3 years ago

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Savatey [412]

I think option C is correct..hope it helps

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2 years ago

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Which shows the order of mechanical advantage from least to greatest?

Eduardwww [97]

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3 years ago

Consider the interactions involved when you use a TV remote control to change the channel. Classify each interaction as long ran

makvit [3.9K]

Explanation:

Following are two interactions that are generally involved when we use a TV remote control to change the channel :

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