3 years ago

Help please!!! Brainlyist to the person who answers and explains correctly!

Physics

2 answers:

arsen [322]3 years ago

7 0

Box 1 the first one is correct

postnew [5]3 years ago

5 0

Answer:

answer is box 1

Explanation:

Ok so an equilibrium of a dynamical system is a value of the state variables where the state variables do not change.In other words, an equilibrium is a solution that does not change with time

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gtnhenbr [62]

The answer should be c

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3 years ago

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An elastic conducting material is stretched into a circular loop of 11.2 cm radius. It is placed with its plane perpendicular to

anygoal [31]

Answer:

0.426 volts

Explanation:

It is given that,

The radius of a circular loop, r = 11.2 cm = 0.112 m

An elastic conducting material is stretched into a circular loop.

It is placed with its plane perpendicular to a uniform 0.880 T magnetic field.

The radius of the loop starts to shrink at an instantaneous rate of 68.8 cm/s, dr/dt = 0.688 m/s

We need to find the emf induced in the loop at that instant.

$\epsilon=\dfrac{-d\phi}{dt}\\\\=\dfrac{d}{dt}(BA)\\\\=\dfrac{d}{dt}(\pi r^2 B)\\\\=\pi B\dfrac{d}{dt}(r^2)\\\\=2\pi B r\dfrac{dr}{dt}\\\\=2\pi \times 0.88\times 0.112\times 0.688\\\\=0.426\ V$