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3 years ago

5

What affects a material’s resistance?

2 answers:

Keith_Richards [23]3 years ago

8 0

Many things can affect a material's resistance, The type of material, how the material is being held (If its laying flat, being pulled, etc). What the material is used for, and how much material there is. Hope this helps!

sergeinik [125]3 years ago

3 0

Forces such as friction, gravity, and many other things affect a material's resistance.

If this answer is correct will you please rate me an excellent I am trying to level up. <span />

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A circular loop of flexible iron wire has an initial circumference of 167 cm, but its circumference is decreasing at a constant

Kisachek [45]

Answer:

Part a)

$EMF = 5.6 \times 10^{-3} V$

Part b)

Since the radius is decreasing so induced current will increase the flux through the coil

So it would be clockwise in direction

Explanation:

As we know that magnetic flux linked with the coil is given as

$\phi = \pi r^2 B$

now the rate of change in flux is given as

$\frac{d\phi}{dt} = 2\pi r \frac{dr}{dt} B$

now we know that circumference is decreasing at rate of 15 cm/s

so here we know the length of circumference as

$C = 2\pi r$

So rate of change in circumference is

$\frac{dC}{dt} = 2\pi \frac{dr}{dt}$

$\frac{1}{2\pi}(15 cm) = \frac{dr}{dt}$

final length of circumference at t = 8 s

$C = 167 - (15)(8) = 47$

Part a)

Now the induced EMF is given as

$EMF = (2\pi r)(\frac{1}{2\pi})(0.15)(0.5)$

$EMF = (0.47)(\frac{1}{2\pi})(0.15)(0.5)$

$EMF = 5.6 \times 10^{-3} V$

Part b)

Since the radius is decreasing so induced current will increase the flux through the coil

So it would be clockwise in direction

5 0

3 years ago

Another word for stored energy is <br> 1 potential <br> 2 kinetic

scoray [572]

Answer:

Potential

Explanation:

Potential energy is the energy stored while kinetic energy is motional energy.

Potential itself means "having capacity/energy".

$\rule[225]{225}{2}$

Hope this helped!

<h3>~AH1807</h3>

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3 years ago

Where in a river would you find fish that are adapted to low light and low oxygen levels?

snow_tiger [21]

The dead Zone is where you were find fish that are adapted to low light and low oxygen levels.

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3 years ago

What are the types of potential energy?

Tasya [4]

Answer:

Gravitational, Electrical, Magnetic, elastic potential, and chemical energy

Explanation:

When I did some research, I found 5 types of potential energy, so list the four that either came up in your lesson or are familiar to you:

Gravitational, Electrical, Magnetic, elastic potential, and/or chemical energy.

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3 years ago

Defining Mechanical Advantage and Efficiency

Volgvan

Answer:

hola como estas she cartoon Chino

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4 years ago

Read 2 more answers