An isotropic radiator has a radiation resistance of 22.5 ohms and loss resistance of 11.25 ohms.  What will be the radiation efficiency? Express in percentage.

Q: The electric field just above photocopying machine has

A:

Q: very long cylinder of r dielectric Material lineas is placed in otherwise uniform electric field Eo…

A: When a long cylinder of linear dielectric material is placed in the uniform electric field. Let, ϕ1…

Q: e^-at (1)n C Ot^2 For the Photoflash unit, Vs= 9V, R1=5KQ, C=D1500 uf , R2= 120. The average power…

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Q: (iv) A current of 2.5 A (peak value) is driven into a 93% efficient antenna. The resulting power…

A:

Q: Determine the strength of the electric field between the parallel plate capacitor if 500V are…

A: First converting the inch into the meters:

Q: Assume that all of the light emitted by a 100W

A: GIVEN  all of the light emitted by a 100W incandescent lamp (1750 lumen s)…

Q: What is the value of the conductance of z = 5+10/ ?

A: Given impedance Z = 5 + j10

Q: 0.2/A- Two thin dipoles of len MHz and 10 MHz respectively. radiate the same amount of power

A:

Q: Figure 13 illustrates liquid level monitoring using radar type level transmitter. Describe how the…

A: The liquid level monitoring using the radar type level transmitter -> This is a non-contact type…

Q: When you cook food in microwave, you are using electromagnetic energy. Select one: True False

A: When you cook food in microwave, you are using electromagnetic energy.

Q: 1111111 Q1. What would be the depth of penetration for copper at 2 MHz frequency with o = 5.8 x 10´?…

A: NOTE :- As per our rule We’ll answer the first question since the exact one wasn’t specified. Please…

Q: Which is related to the peak wavelength of an LED? Please choose one: a. color b. all of the above…

A: Which is related to the peak wavelength of an LED?

Q: ? The unit of the electric field intensity is V/m O V/IO VO V/Nm O

A: here we have to find the unit of the electric field intensity.

Q: 6. The most effect that atmosphere can have on solar radiation is by B and C C) Transmission anr…

A: Choose the correct option The most effect that atmosphere can have on solar radiation is by...

Q: If an isotropic source radiates a power of 20 kW, then what will be the electric field field…

A: To calculate the electric field strength from an isotropic source at a distance of 10 Km when it is…

Q: The value of photocurrent will be high on a partially sunny day Select one: True False

A:

Q: What is the difference between an Insulator and a Dielectric?

A: Insulator- Insulator is a substance that provides tremendous amount of resistance towards the…

Q: In a conductor the forbidden energy gap between the bands is around 1 eV. Select one: O True O False

A: In a conductor Forbidden energy gap is 0eV. That is conduction band and Valence band overlap with…

Q: What is the magnitude of the electric field (in N/C) at a distance of 1 mm from a single electron?…

A: Brief description:  By knowing the standard electric field expression we need to calculate the…

Q: The flux produced in the dielectric of a capacitor is 9 x 10-4 coulomb when the impressed emf is…

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Q: Calculate the luminous intensity of a lamp that has a luminous flux of 750 lumens with an apex angle…

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Q: The wavelength of life used in the transmitter is a. 680 nm b. 670nm c. 665 nm d. None of above

A: Basic problem on wavelength of the transmitter.  Look below for the solution..

Q: Fill in the blanks: Q. Other name of TDR is _______________ Reflectometer.

A: TDR: It stands for Time Domain Reflectometer. It measures reflections along a conductor. It…

Q: The illumIllumin at a point on a working plane directly below the lamp is to be 80 lumens/m2. The…

A: The solution can be achieved as follows.

Q: The ground cover ratio depends on all the following parameters except Distances between rows Tilt…

A: Right Answer option Distance Between rows

Q: What is the value of the conductance of z = 5+ 10j ?

A: Given: Z=5+10j Z=R+jXL

Q: Loss tangent is a standard measure of lossiness in a dielectric which is typically used to classify…

A: Loss tangent conditions for good conductor and good dielectric ?

Q: A wire carries a current i 3cos314t A. What is the average current over 6 seconds?

A: We are given, I = 3 cos 314t A. We need to find average value of current for 6 seconds.

Q: Assume a 20x25x4m hall. How many metersquare acoustic absorber surface do you need to decrease the…

A: The Reverberation Time (T60)  is given using Sabine’s Formula as shown below:…

Q: this is an electromagnetic field and waves lesson question. Please only give the correct answer.…

A: According to question:

Q: Correct Mark 3.00 out of 3.00 P Flag question If a parallel plate capacitor of plate area 2 m2 and…

A: In this question , we will find voltage across capacitor with given data of charge , dielectric…

Q: When light goes from donser to rarer medium, on incidant angie less than the critiool angle, which…

A: In this question , we will write when light goes from densor to rarer medium as incident angle less…

Q: what is the dielectric effects on the properties charge

A: Dielectric is a material with protective properties. It is capable of transmitting electrical energy…

Q: The radiation resistance of a circular loop of one turn is 0.01 ohm. The radiation resistance of…

A:

Q: Calculate the luminous intensity of a lamp that has a luminous flux of 750 lumens with an apex angle…

A: In this question,  Choose the correct option What is luminous intensity?  luminous intensity = Lumen…

Q: Explain the Beam radiation and diffusive radiation with necessary diagram.

A: Beam radiation is the solar radiation received from the Sun without having been scattered by the…

Q: The average % efficiency of Photovoltaic panels is. а. 95 b. 55 с. 15 d. 35

A: Average efficiency of photovoltaic panel is very low. It is vary from 13 to 17 %.

Q: A source that gives 800 lm emits a light directed to an inclined plane at an angle of 33 degrees…

A: It is given that: ϕ=800 lmθ=33°h=10ft=3.048m

Q: Approximately, what is the percent shimmer for the following signal? 0.25 0.32 0.18 0.34 0.25

A: Answer -  Shimmer% can be calculated as follows

Q: 4. A cathode ray beam (an electron beam: me = 9.1 x 10-31 kg) is bent in a circle of radius 1.55 m…

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Q: An em radiator is radiating at 0.012 meters. What will be the frequency?

A: Given that λ(wavelength)=0.12 m Although formulas of radiating frequency of electromagnetic radiator…

Q: Many rows of mirrors, which turn to face the sun and focus its rays onto the tower boiler, is…

A: sun based force tower framework utilizes a huge field of level, sun-following mirrors called…

Q: Dielectric resistance between two surfaces depends on

A: Dielectric conductivity

Q: What would be the depth of penetration for copper at 2 MHz frequency with o = 5.8 x 107? %3D

A:

Q: 3. Sketch V, and determine Ve 23A0

A: Phase controlled rectifier- Phase controlled rectifier are used constant input voltage to controlled…

Q: E-05, PC-02. What are the factors affecting the capacitance of capacitor. Area of plates and…

A: The expression for Capacitance is expressed as, C=∈AD Where, ∈ is the dielectric A is the area of…

Photoelectric

The photoelectric effect occurs when light (or similar incident radiation, including X-rays) falls on material together with a metal plate and causes it to emit electrons. The discovery of the photoelectric effect led to important new theories (and to a Nobel Prize for Albert Einstein). Photoelectric cells, or photocells, are utilized in burglar-alarm light detectors and garage-door openers (each employs a through-beam of light this is broken when something movements throughout it), and also to play soundtracks on film movies (in which a light beam shines through the soundtrack encoded at the film and is "read" with the aid of the photocells).