If the electron density of the ionosphere is 2.11x1011/m3, then what will be critical frequency?

Q: Find out the Electric field strength 90 km away from a transmitting antenna transmitting 50 kW…

A: Write the expression to find the electric field strength at a point from a transmitting antenna as…

Q: An antenna has an effective length of 100 m and the current at the base is 450 A (rms) at 40 kHz.…

A: The power radiated by the antenna can be expressed as

Q: A beam of Visible light with a frequency of 4.5E+14 Hz and intensity of 0.0051 W strikes a solar…

A: Given    Frequency (f) = 4.5 ×  10^ 14 Hz.    Intensity = 0.0051 Watt      Intensity =   Number of…

Q: the skin depth or penetration depth o for Couper plate at f=1 GHz is take the conductivity 5.8*10^7…

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Q: a) Determine the magnitudes of the electric and magnetic fields of a half-wave dipole operated at a…

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Q: The wavelength difference between two light sources is 12.5 nm. What will be the frequency…

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Q: In a photoelectric experiment the maximum kinetic energy E, of the ejected photo-electrons depends…

A: Photoelectric experiment

Q: Find out the electric field strength at 120 km away from a transmitting antenna. The antenna is…

A: The power density of the antenna is given by the formula as

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

A: The terms Beam and Diffuse radiation are the two radiations existed in solar radiation. These are…

Q: Calculate the frequency of a signal with a wavelength of 21 m. Round the final answer to two decimal…

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Q: 15 A current? What is the radiation resistance of an antenna which radiates 5 kW when it draw

A:

Q: (II) In a photoelectric experiment using a clean sodium surface, the maximum energy of the emitted…

A: As per our policy i have attempted only one. The graph is given as,

Q: Example 2.3 What is the open-circuit noise voltage across a 100k ohm resistor over the frequency…

A:

Q: A car antenna 1m in the AM frequency band of 1.5 MHZ. How much current is required to transmit 4W of…

A: Modulation is process by which some properties of carrier signal is varied according to modulating…

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: 2 Efud inductoniee pes km per phace.

A:

Q: The incoming solar radiation at a place on the surface of the earth is 1.2 kW/m2. What will be the…

A: The solar power density on the surface of the earth can be expressed by the following equation

Q: What value of capacitance is required to produce 50 2 of reactance at 450 MHz?

A: To solve above problem, one should know how to find equivalent capacitance for series and parallel…

Q: 3. What value of capacitance is required to produce 50 V of reactance at 450 MHz?

A: Capacitance reactance Xc= 12π× frequency × capacitance    Given capacitive reactance = 50 ohms and…

Q: What is meant by the wavelength, amplitude, -1 ? frequency and polarization of a wave List in order…

A: 1) Wave length: It is distance between the two successive  crests or troughs of a waves. It is…

Q: GIVEN THE VOLTAGE WAVEFORMDETERMINE THE VARIATIONS IN CURRENT C = 100 nF ± 20%

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Q: Plane z = 10 m carries charge 4nC/m2. The electric field intensity at the origin is;

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Q: What is the luminous flux of a lamp with 255 candelas intensity with a viewing angle of 35 degrees?

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Q: 5.1.4 Determine the frequency where the internal inductance of a #32 AWG solid wire begins to…

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Q: current required to radiate apower

A: Antenna- An antenna is a structure made up of metal which captures or transmits radio…

Q: DA 3 GHZ Ssignal ndergoes a 2280 phese shift when traveling along 'a dielectric filled The Cutoffof…

A:

Q: m long vertical conductor operates over a perfectly conducting ground plane. It is ase-fed at a…

A:

Q: A solid specimen of dielectric has a dielectric constant of 4.2 and tan 8 = 0.001 at a Frequency of…

A: Given: εr=4.2 tanδ=0.001 f=50Hz E=5KV/mm=5×104/cm

Q: Determine the dielectric constant of material in which the polarization and electric field values…

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Q: por find Ir.

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Q: bläi 4 An electron drop from specific energy level to the ground state, the energy difference…

A: Given: Difference in energy level, ∆E=12.089 eV Stable orbit is n=1

Q: What is the value of luminous flux of a light source with 1 candela intensity and viewing angle of…

A: Luminous flux:  It is the measure of the perceived power of light or the total amount of light a…

Q: 7. Determine the wavelength of light emitted by a certain material with Eg=1.2

A: We need to find out wavelength for given Eg .

Q: In the figure below, what is the magnitude of the electric field at the vacant corner of the square?…

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Q: Q4: The power of laser beam is (5mw) and its intensity (1325 w/m2), determine the divergence angle…

A: This is a good question based on finding out the angle of divergence for the light beam . In this…

Q: Q9- Draw the spectrum of NBFM , if Fc=10MHz,Fm=1KHz,B=3, Ac=10?

A:

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: 27. A coil in the radio transmitter has an inductance of 150 milli henry. At what frequency will it…

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Q: Q5: A. A ray of light in a core of fiber optic of refractive index 1.68 is approaching to cladding…

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Q: A Lossy Dielectric @perate at 50Ma t has E=3. 6 Eo, 4=llo and find

A: Given:  Brief description: In the above given question they have mentioned a lossy dielectric medium…

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: 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: What will be the effective isotropic radiated power of an antenna transmitting 25 W of power and the…

A: The effective isotropic radiated power is the product of the power transmitted (PT) by an antenna…

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 wave length (A) of the photon .7 * ;emitted with frequency f = 3*1015 Hz is .λ = 0.1 pm .λ = 0.1…

A: Given, Frequency of photon, f=3×1015 Hz

Q: A charge of qa = 10 nC is at the origin of the ry plane in air, where the rela = 1. What is the…

A:

Q: Q26. There are three electric field lines as shown here. At which position has the lowest field…

A: In this question they have mentioned the electric field pattern for electric field lines…

Q: Determine the remaining intensity of the light leaving through 8.3Km optical fiber if the…

A: Attenuation in optical fiber: Attenuation is defined as power loss in transmitting the wave from the…

Q: 14) A radio receives a signal with strength -87dBm. What is the power in watts that it is receiving?

A: Given, Radio signal strength in dBm is PdBm=-87

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).