All categories

3 years ago

What is electricity:

Physics

2 answers:

bazaltina [42]3 years ago

5 0

Answer:

electricity is flow of charges .

snow_tiger [21]3 years ago

3 0

Answer:

it is the power

Explanation:

it produce from watee

You might be interested in

Consider a portion of a cell membrane that has a thickness of 7.50 nm and 1.4 µm ✕ 1.4 µm in area. A measurement of the potentia

Alla [95]

Answer:

Part a: The current is 1.49x10⁻¹² A

Part b: The current is decreased by a factor of 4.

Explanation:

Part a

The area is given as

A =(1.4*10⁻⁶)² =1.96*10⁻¹² m²

The resistance is given as where resistivity of the membrane material is 1.30 x 10⁷ ohms*m

R=pL/A =(1.3*10⁷)(7.5*10⁻⁹)/(1.96*10⁻¹²)

R=4.97x10¹⁰ ohms

So the resistance is 4.97x10¹⁰ ohms.

I=V/R =86.0x10⁻³/5.77x10¹⁰

I=1.49x10^⁻¹² A

So the current is 1.49x10⁻¹² A

S=So/2=1.4/2 =0.7μm

A=(0.7*10^-6)^2=4.9*10⁻¹³ m²

R=pL/A =(1.3*10⁷)(7.5*10⁻⁹)/(4.9*10⁻¹³)

R=1.98x10¹¹ ohms

So the resistance is 1.98x10¹¹ ohms.

I=V/R =86.0x10⁻³/1.98x10¹¹

I2=4.52x10^⁻¹³ A

So the ratio of the new current vs the old current is as

I2/I=4.52x10^⁻¹³/1.49x10⁻¹²=0.25

So the current is decreased by a factor of 4.

7 0

4 years ago

Two circular loops carry identical currents, but the radius of one loop is twice that of the other.

Valentin [98]

The magnetic field at the center of the 2nd loop is half the magnetic field at the center of the 1st loop.

Explanation:

The magnetic field strength at the center of a current-carrying circular loop is

$B=\frac{\mu_0 I}{2R}$

where

$\mu_0$ is the vacuum permeability

I is the current

R is the radius of the loop

For the first circular loop, we have

$B_1 = \frac{\mu_0 I_1}{2R_1}$

The second loop has

$I_2 = I_1$ (same current)

$R_2 = 2R_1$ (twice the radius)

So, the magnetic field at the centre of the second loop is

$B_2 = \frac{\mu_0 I_2}{2R_2}=\frac{1}{2}(\frac{\mu_0 I_1}{2R_1})=\frac{B_1}{2}$

So, the magnetic field at the center of the 2nd loop is half the magnetic field at the center of the 1st loop.

Learn more about magnetic fields:

brainly.com/question/3874443

brainly.com/question/4240735

#LearnwithBrainly

4 0

3 years ago

Bile helps in the digestion of —————-

Gnoma [55]

Answer:

Bile helps in the digestion of fats

4 0

3 years ago

Read 2 more answers

How condensation affects the temperature of the area where liquids forms

NISA [10]

Condensation does not effect the temperature of the area, condensation is the product the temperature difference between an object and the area it is in

7 0

3 years ago

When placed in direct sunlight, which an object will absorb the most visible light energy

Vikentia [17]

I would guess anything that is black? black absorbs there most light energy. that's is why a black car in the sun will always be hotter inside than a white car.

3 0

4 years ago

What is electricity:​

What is electricity: