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evablogger [386]
3 years ago
10

What must be done to the wires used to make an electromagnet before they are connected​

Physics
2 answers:
dalvyx [7]3 years ago
5 0

Answer:

Neatly wrap the wire around the nail

Explanation:

hope this helps ( not sure tho )

Alla [95]3 years ago
4 0

Answer:

By simply wrapping wire that has an electrical current running through it around a nail, you can make an electromagnet. When the electric current moves through a wire, it makes a magnetic field. If you coil the wire around and around, it will make the magnetic force stronger, but not strong enough.

Explanation:

Hope this helps!!

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it Give only one of them a positive or negative charge

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An extreme skier, starting from rest, coasts down a mountain slope that makes an angle of 25.0 with the horizontal. The coeffici
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Answer:

V = 10.88 m/s

Explanation:

V_i =initial velocity = 0m/s

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putting values we get

a= 9.8sin25-0.2cos25= 2.4 m/s^2

v_f= final velocity and d= displacement along the inclined plane = 10.4 m

using the equation

v^2_f=v^2_i-2as

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using conservation of energy

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(0.5) m V_f^2 + mgh = (0.5) m V^2

V^2 = V_f^2 + 2gh

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V = 10.88 m/s

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A convex thin lens with refractive index of 1.50 has a focal length of 30cm in air. When immersed in a certain transparent liqui
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Answer:

n_l = 1.97

Explanation:

given data:

refractive index of lens 1.50

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Focal length of lens is given as

\frac{1}{f} =\frac{n_2 -n_1}{n_1} * \left [\frac{1}{r1} -\frac{1}{r2}   \right ]

\frac{1}{f} =\frac{n_{g} -n_{air}}{n_{air}} * \left [\frac{1}{r1} -\frac{1}{r2}   \right ]

\frac{1}{f} =\frac{n_{g} -1}{1} * \left [\frac{1}{r1} -\frac{1}{r2}   \right ]

focal length of lens in liquid is

\frac{1}{f} =\frac{n_{g} -n_{l}}{n_{l}} * \left [\frac{1}{r1} -\frac{1}{r2}   \right ]

                =\frac{n_{g} -n_{l}}{n_{l}}  [\frac{1}{(n_{g} - 1) f}

rearrange fron_l

n_l = \frac{n_g f_l}{f_l+f(n_g-1)}

n_l = \frac{1.50*(-188)}{-188 + 30(1.50 -1)}

n_l = 1.97

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