Does photoelectric effect depends on intensity?
The photoelectric effect is dependent upon various factors including frequency of light, intensity of light, nature of material, energy of light and potential difference.
How do you convert electrons into energy?
Ion-electron or positron-electron plasma with magnetic confinement theoretically allows direct conversion of particle energy to electricity by the separation of the positive particles from the negative particles with magnetic deflection.
What converts electron to photon?
Photonic device
What are the photons converted to?
Photovoltaics or solar cells convert photon energy into electrostatic potential energy, or convert power supplied by a flow of photons into electrical power. Photosynthesis is the process by which the energy of a photon is converted into chemical energy.
Which is device that converts electrons to photons or vice versa?
Antenna
What is the nature of current distribution over the small dipoles *?
3) What is the nature of current distribution over the small dipoles? Explanation: No explanation is available for this question! 4) Which term is regarded as an inductive field as it is predictable from Biot Savart law & considered to be of prime importance at near field or the distance close to current element?
Under which conditions of charge does the radiation occur through wire antenna?
Answer. Explanation: For a single wire antenna, 1. If a charge is not moving, current is not created and there is no radiation.
What are typical advantages of arrays?
Advantages of Arrays Arrays represent multiple data items of the same type using a single name. In arrays, the elements can be accessed randomly by using the index number. Arrays allocate memory in contiguous memory locations for all its elements.
Which of the following is false regarding a linear broadside array with two elements and spacing?
Which of the following is false regarding a linear broadside array with 2 elements and spacing λ? Explanation: Since the spacing between elements is an integral multiple of λ (n=1), grating lobes occurs.
What is end fire array?
[′end ‚fīr ə′rā] (electromagnetism) A linear array whose direction of maximum radiation is along the axis of the array; it may be either unidirectional or bidirectional; the elements of the array are parallel and in the same plane, as in a fishbone antenna. Also known as end-fire antenna.
What is pattern multiplication principle?
The pattern multiplication principle states that the radiation patterns of an array of N identical antennas is equal to the product of the element pattern Fe( ) (pattern of one of the antennas) and the array pattern Fa( ), where Fa( ) is the pattern obtained upon replacing all of the actual antennas with isotropic …
What is the maximum direction of radiation of an broad side array?
The direction of maximum radiation is always perpendicular to the line or the plane of the array according to the elements that lie on a line or a plane. A broadside array looks like a ladder.
What is parasitic array?
A parasitic array consists of a single driven element connected to the feedline, and other elements which are not, called parasitic elements. It is usually another name for a Yagi-Uda antenna.
How many types of antenna array are there?
But we need more control than that to custom design the radiation pattern for more advanced applications. We will consider two main types of antenna arrays: phased arrays and binomial arrays (which might be better called amplitude arrays). But first we will study the simplest case: an array of two identical antennas.
What are the types of antenna array?
Types of Arrays
- Collinear array.
- Broad side array.
- End fire array.
- Parasitic array.
- Yagi-Uda array.
- Log-peroidic array.
- Turnstile array.
- Super-turnstile array.
Why do we use antenna array?
An antenna array is used to increase overall gain, provide diversity reception, cancel out interference, maneuver the array in a particular direction, gage the direction of arrival of incoming signals, and to maximize the Signal to Interference plus Noise Ratio (SINR). …
What are the advantages and disadvantages with array technique in antenna system?
Advantages and Disadvantage of Smart Antenna In Wireless Communications
- ii) Increased Range. As the smart antenna focuses gain on the communicating device, the range of operation increases.
- iii) Security.
- v) Reduced Interference.
- iv) Increased bandwidth.
- i) Complex.
- ii) More Expensive.
- iii) Larger Size.
- iv) Location.