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3 years ago

HELP!! Worth a lot of points :) (Physics question)

Physics

2 answers:

Temka [501]3 years ago

8 0

My answer would be B.
Source:
i had this question before.
Hope that this helps you! =)

nadezda [96]3 years ago

6 0

It's B if that helps at all :) (I'm like, 98% sure that it's totally B!

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kirill115 [55]

Answer:9.34 A/s

Explanation:

Given

radius of solenoid $R=1.06 m$

Emf induced $E=8.50\times 10^{-6} V/m$

no of turns per meter n=450

we know Induced EMF is given by

$\int Edl=-\frac{\mathrm{d} \phi}{\mathrm{d} t}=-\frac{\mathrm{d} B}{\mathrm{d} t}A$

Magnetic Field is given by

$B=\mu _0ni$

thus $\frac{\mathrm{d} B}{\mathrm{d} t}=-\mu _0n\frac{\mathrm{d} i}{\mathrm{d} t}$

Area of cross-section

$A=\pi R^2$ where

solving integration we get

$E.\cdot 2\pi r=\mu _0n\frac{\mathrm{d} i}{\mathrm{d} t}\pi R^2$

where r=distance from axis

R=radius of Solenoid

$\frac{\mathrm{d} i}{\mathrm{d} t}=\frac{Er}{\mu _0nR^2}$

$\frac{\mathrm{d} i}{\mathrm{d} t}=\frac{8.50\times 10^{-6}\times 3.49\times 10^{-2}}{4\pi \times 10^{-7}\times 450\times 1.06^2}$

$\frac{\mathrm{d} i}{\mathrm{d} t}=9.34 A/s$

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3 years ago

A block slides down an incline plane that makes a 30 degree angle with the

Alona [7]

Hi there!

We know that:

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Force due to friction = μMgcosθ

Let the positive direction be directed in the direction of the block's acceleration, which is downward.

Thus:

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a = gsinθ - μgcosθ

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Answer:

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Explanation:

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andrew11 [14]

Answer:

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Explanation:

Given

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Montano1993 [528]

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2 years ago

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