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3 years ago

How can the frequency with which the direction of a current changes be regulated?

Physics

1 answer:

sesenic [268]3 years ago

5 0

Answer:

In an inductive circuit, when frequency increases, the circuit current decreases and vice versa.

Explanation:

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A mechanical wave starts when matter is disturbed by a source of ______.

Gwar [14]

Answer:

MATERIAL MEDIUM

Explanation:

Wave is a disturbance that travels through a medium and transfer energy from one point to another without causing any permanent displacement of the medium itself. The two forms of wave are the mechanical wave and the electromagnetic waves.

Mechanical wave is a wave with requires MATERIAL MEDIUM for its propagation. This means that before wave can be propagated at times, material medium is needed e.g a ripple tank. A ripple tank is a mechanical device that generates waves using an instrument called stroboscope attached to it. This kind of wave requires an external source before it can propagate compared to electromagnetic waves that does not require material medium for its propagation.

5 0

3 years ago

Coherent light with wavelength 608 nm passes through two very narrow slits, and the interference pattern is observed on a screen

Kipish [7]

Answer:

$1.22 \mu m$

Explanation:

In the double-slit interference, light passes through a double slit and produce a pattern of alternating bright and dark fringes on a distant screen. This pattern is due to the combined effect of the diffraction of each slit + the interference of the light coming from the two slits.

The condition to observe a maximum (bright fringe), so costructive interference, in the distant screen, is:

$y=\frac{m\lambda D}{d}$

where:

y is the distance of the m-th maximum from the central fringe

$\lambda$ is the wavelength of the light used

D is the distance of the screen from the slits

d is the separation between the slits

In this problem, we know that:

$\lambda=608 nm=608\cdot 10^{-9}m$ is the wavelength of light used

$D=3.00 m$ is the distance of the screen

$y=4.84 mm = 4.84\cdot 10^{-3} m$ is the distance of the first maximum (first-order bright fringe) from the central pattern, so when

m = 1

Solving for d, we find the separation of the slits:

$d=\frac{m\lambda D}{y}=\frac{(1)(608\cdot 10^{-9})(3.00)}{4.84\cdot 10^{-3}}=3.77\cdot 10^{-4} m$

The first dark fringe on the screen instead is given by the formula

$y'=\frac{(\frac{\lambda'}{2})D}{d}$

where

$\lambda'$ is the wavelength of the new light

Here we want the first dark fringe of the new light to be coincident to the first bright fringe of the previous light, so

$y=4.84\cdot 10^{-3}m$

Therefore, solving for $\lambda'$ ,

$\lambda'=\frac{2y'd}{D}=\frac{2(4.84\cdot 10^{-3})(3.77\cdot 10^{-4})}{3.00}=1.22\cdot 10^{-6} m = 1.22 \mu m$

4 0

3 years ago

What is Radioactivity?

grin007 [14]

Answer:

the act of emitting radiation spontaneously

Explanation:

7 0

2 years ago

Read 2 more answers

Which element is located in period 3 of the periodic table?

liberstina [14]

Answer:

From the given options, the option (D) is correct. Because Al is the aluminium which is located in period 3 of the periodic table.

Explanation:

We know that the 3rd period contains 8 elements which are as follows:

sodium
magnesium
aluminium
silicon
phosphorus
sulfur
chlorine, and
argon

The sodium and magnesium, the first 2 elements, are members of the s-block of the periodic table, while the rest of the members are the elements of the p-block.

Thus, from the given options, the option (D) is correct. Because Al is the aluminium which is located in period 3 of the periodic table.

3 0

3 years ago

A car accidentally rolls off cliff as it leaves the cliff it has a horizontal velocity of 13 m/s it hits the ground 60 m from th

nasty-shy [4]

Answer:

h = 104.13 m

Explanation:

Given that,

Horizontal velocity of the car, v = 13 m/s

It hits the ground 60 m from the shoreline

We need to find the height of the cliff. Let t be the time of fall. We can find it as follows :

$t=\dfrac{d}{v}\\\\t=\dfrac{60\ m}{13\ m/s}\\\\t=4.61\ s$

So, the time of fall is 4.61 seconds.

Let h is the height of the cilff. Using second equation of motion to find it as follows :

$h=\dfrac{1}{2}gt^2\\\\h=\dfrac{1}{2}\times 9.8\times 4.61^2\\\\=104.13\ m$

So, the height of the cliff is 104.13 m.

6 0

3 years ago