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laila [671]
3 years ago
4

An electromagnet is created using a battery, an insulated copper wire, and an iron nail. The wire is wrapped around the nail 20

times and attached to the battery. Which pair of changes will definitely increase the strength of the electromagnet?
Physics
2 answers:
Veseljchak [2.6K]3 years ago
4 0
Think of each turn as a tiny electromagnet, and they all add up. So increasing the number of turns will increase the magnet strength. And if the current increases then the magnetic field strength increases. Current = Voltage/Resistance. So increasing the voltage will increase the current.
so if there is "Increase the voltage of the battery and increases the number of turns of the coil" then that option should be the answer 
Roman55 [17]3 years ago
4 0

^The answer is C if doing USA test prep !!!


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Fittoniya [83]

The acceleration of the air plane is 3.879 \mathrm{m} / \mathrm{s}^{2}

<u>Explanation:</u>

Given:

The mass of the air plane = 1492.3 kg

Force of each four engine = 1447.5 N

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The force that acts on the object is equal to the product of mass (m) and its acceleration. It can express by the below formula,

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The above equation can be written as below to find acceleration,

                        a=\frac{F}{m}

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3 0
3 years ago
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harina [27]

I can not solve the problem if I do not have the mass.

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An elevator filled with passengers has a mass of 1603 kg. (a) The elevator accelerates upward from rest at a rate of 1.20 m/s2 f
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Answer:

T = 17649.03 N = 17.65 KN

Explanation:

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T = W_A = m(g+a)\\

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T = Tension in cable = ?

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Therefore,

T = (1603\ kg)(9.81\ m/s^2+1.2\ m/s^2)\\\\

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