Question is incomplete and image is not attached ti the question. The required image is attached below, so the complete question is:
The diagram shows a device that uses radio waves.
What is the role of the part in the diagram labeled Y?
- modulate, amplify, and send out waves
- capture, amplify, and demodulate waves
- change the amplitude and frequency of waves
- change the pulse and phase of waves
Answer:
2. capture, amplify, and demodulate waves
Explanation:
The part Y labeled in the diagram refers to radio receiver which capture, amplify and demodulate the radio waves.
The radio receiver seperates required radio frequency signals through antenna and consist of an amplifier that amplify or increase the power of receiving signal. At the end, demodulators present in receivers recover the information from the modulated wave.
Hence, the correct option is 2.
Answer:
In electromagnetic waves, energy is transferred through vibrations of electric and magnetic fields. In sound waves, energy is transferred through vibration of air particles or particles of a solid through which the sound travels. In water waves, energy is transferred through the vibration of the water particles.
Where the sun doesn't hit the water directly. hope this helps
Magnetic field outside it due to long wire is given by
![B = \frac{u_o i}{2 \pi r}](https://tex.z-dn.net/?f=B%20%3D%20%5Cfrac%7Bu_o%20i%7D%7B2%20%5Cpi%20r%7D)
Magnetic field due to long wire inside wire at any point
![B = \frac{u_o i r}{2 \pi R^2}](https://tex.z-dn.net/?f=B%20%3D%20%5Cfrac%7Bu_o%20i%20r%7D%7B2%20%5Cpi%20R%5E2%7D)
Now the ratio of two magnetic field is given by
![\frac{B_{in}}{B_{out}} = \frac{r_1/R^2}{1/r_2}](https://tex.z-dn.net/?f=%5Cfrac%7BB_%7Bin%7D%7D%7BB_%7Bout%7D%7D%20%3D%20%5Cfrac%7Br_1%2FR%5E2%7D%7B1%2Fr_2%7D)
![\frac{0.285}{0.200} = \frac{4*10}{R^2}](https://tex.z-dn.net/?f=%5Cfrac%7B0.285%7D%7B0.200%7D%20%3D%20%5Cfrac%7B4%2A10%7D%7BR%5E2%7D)
![1.425 = \frac{40}{R^2}](https://tex.z-dn.net/?f=1.425%20%3D%20%5Cfrac%7B40%7D%7BR%5E2%7D)
R = 5.3 mm
Answer: F = 2N
Explanation: If a current i is flowing in a wire of length L lying in a region of magnetic field B, then the magnetic force acting on the wire is given by
F = BIL
Please find the attached file for the solution