Description : Describe three ways to prevent polarization
Last Answer : vent the cell, add a material rich in oxygen, and use a material that will absorb hydrogen.
Description : Rotating the plane of polarization of a wavefront by passing it through a ferrite device is called what?
Last Answer : . Faraday rotation.
Description : What is the polarization of the energy radiated by a vertical slot?
Last Answer : Horizontal.
Description : What type of polarization should be used if an antenna is mounted on a moving vehicle at frequencies below 50 megahertz?
Last Answer : Vertical polarization.
Description : What is an advantage of using horizontal polarization at high frequencies?
Last Answer : Less interference is experienced by man-made noise sources
Description : What type of polarization should be used at medium and low frequencies?
Description : If a wave's electric lines of force rotate through 360 degrees with every cycle of rf energy, what is the polarization of this wave?
Last Answer : Circular polarization.
Description : The direction of what field is used to designate the polarization of a wave?
Last Answer : Electric (E) field.
Description : Describe with respect to antenna (i) radiation pattern (ii) directive gain (iii) power gam (iv) polarization
Last Answer : (i) Radiation pattern:-A graph or diagram which tells us about the manner in which an antenna radiates more power in different directions is known as the radiation patteren of antenna. ( ... as the direction of the electric vector in the electromagnetic wave radiated by the transmitting antenna.
Description : What three things prevent a CT rotor from turning when voltages are applied to its stator windings?
Last Answer : The rotor is specially wound, it is never connected to an ac supply, and its output is always applied to a high-impedance load.
Description : LEDs operating at 850 nm provide sufficient optical power for short-distance, low-bandwidth multimode systems. List three conditions that prevent the use of LEDs in longer distance, higher bandwidth multimode systems.
Last Answer : Multimode fiber dispersion, the relatively high fiber attenuation, and the LED's relatively low optical output power.
Description : There are three commonly detectable points of zero polarization of diffuse sky radiation, neutral points, lying along the vertical circle through the sun. Which of the following is NOT one of these points? Is it the: w) Arago Point x) Babinet Point y) Brewster Point z) Longfellow Point
Last Answer : ANSWER: Z -- LONGFELLOW POINT
Description : What are three ways of controlling radiated emi during transmission?
Last Answer : a) physical separation of the antenna (b) limiting bandwidth of the antenna (c) use of directional antennas
Description : What are three ways of controlling the amount of transmitter-generated emi?
Last Answer : (a) filtering and shielding of the transmitter (b) limiting bandwidth (c) cutting the antenna to the
Description : Technical manuals for tape recorders can state the SNR in what three different ways?
Last Answer : a. Root-mean-square (RMS) signal-to-RMS noise. b. Peak-to-peak signal-to-RMS noise. c. Peak signal-to-RMS noise.
Description : In what three ways are fuses rated?
Last Answer : Current, voltage, and time delay.
Description : What are the three ways of combining cells, and what is each used for?
Last Answer : Series, to increase voltage but not current. Parallel, to increase current but not voltage. Series-Parallel, to increase both current and
Description : (a) Explain two ways by which food industries prevent rancidity. (b) Discuss the importance of decomposition reaction in metal industry with three points. -Chemistry
Last Answer : Answer. (a) (i) Rancidity can be prevented by adding antioxidants to food containing fat and oil, e.g. butylated hydroxy anisole is added to butter as antioxidant. (ii) It can be prevented ... cryolite. (iii) Carbonate ores are thermally decomposed to give metal oxide which on reduction give metal.
Description : What method is used to prevent oscillations in large synchro units?
Last Answer : Mechanical damping.
Description : Should the capacitance of the photodetector be kept small or large to prevent the RC time constant from limiting the response time?
Last Answer : Small
Description : . What does a password prevent?
Last Answer : Unauthorized entry into the main computer's program.
Description : How do you prevent excessive heat buildup on an area of a board when soldering multilead components?
Last Answer : Use a skipping pattern
Description : What material is applied to electronic assemblies to prevent damage from corrosion, moisture, and stress?
Last Answer : Conformal coating
Description : What methods are used to prevent unwanted component interaction?
Last Answer : Ground planes, shielding, and component placement.
Description : What structurally large, low-resistance conductor is connected in parallel with the meter movement to prevent damage?
Last Answer : Shunt.
Description : A light wave can be represented as a plane wave. What three properties of light propagation describe a plane wave?
Last Answer : Direction, amplitude, and wavelength of propagation
Description : how do polarization and opinion shift generally work in a decision-making group? -General Knowledge
Last Answer : They depend on the predispositions of the members. -is how polarization and opinion shift generally work in a decision-making group.
Description : Who in 1808 discovered polarization of light and introduced the term ‘Polarization’?
Last Answer : Answer: Etienne-Louis Malus.
Last Answer : Polarization is the division into two opposite or opposing groups or camps.
Description : Polarization of electrons in acrolein may be written as:
Last Answer : Polarization of electrons in acrolein may be written as: A. `H_(2)overset(delta+)"C"=CH-CH=overset( ... (2)overset(delta-)C=CH-CH=overset(delta+)O`
Description : Is it true that charges do not transfer between objects in polarization or conduction?
Last Answer : Need answer
Description : How did the KKK contribute to the polarization and sectional alignment of political parties in the late nineteenth century?
Last Answer : What is the answer ?
Description : The information of brilliant colors in a thin soap film is a consequence of the phenomena of - (1) Polarization and interference (2) Diffraction and dispersion (3) Multiple refraction and dispersion (4) Multiple reflection and interference
Last Answer : (4) Multiple reflection and interference Explanation: Light waves reflected by the upper and lower boundaries of a thin film interfere with one another, either enhancing or reducing the reflected light.
Description : Which of the following supports particle nature of photons? (1) Diffraction (2) Polarization (3) Photoelectric effect (4) Interference
Last Answer : (3) Photoelectric effect
Description : Which phenomenon is responsible for the echo of sound wave? (1) Reflection (2) Refraction (3) Interference (4) Polarization
Last Answer : (1) Reflection Explanation: Reflection of sound waves off of surfaces lead to one of two phenomena - an echo or a reverberation. The echo is produced due to hitting of the sound waves with the ... reflected sound wave reaches the ear more than 0.1 seconds after the original sound wave was heard.
Description : Which of the following phenomenon helps to conclude that light is a transverse wave? (1) interference (2) diffraction (3) polarization (4) refraction
Last Answer : (3) polarization Explanation: The phenomena of interference and diffraction of light were successful beyond doubt to prove that light is a form of wave. But they failed to decide whether light ... light is a transverse wave was established only after the discovery of the phenomenon of polarization.
Description : Golden view of sea shell is due to - (1) Diffraction (2) Dispersion (3) Polarization (4) Reflection
Last Answer : (3) Polarization Explanation: When a ray of light falls on sea shell, its small amount gets refracted (slightly polarized) and rest almost gets reflected back (fully polarized). So it gets a golden view because of polarization.
Description : Sir C.V. Raman was awarded Nobel Prize for his work connected with which of the following phenomenon of radiation? (1) Scattering (2) Diffraction (3) Interference (4) Polarization
Last Answer : (1) Scattering Explanation: Sir C.V. Raman was awarded Nobel Prize for his work scattering of radiation. Sir Chandrashekhara Venkata Raman was an Indian physicist born in the former Madras Province in India.
Description : On a rainy day, small oil films on water show brilliant colors. This is due to - (1) dispersion (2) interference (3) diffraction (4) polarization
Last Answer : (2) interference Explanation: The combination of two or more electromagnetic waveforms to form a resultant wave in which the displacement is either reinforced or cancelled.
Description : A thin oil film on a water surface appears coloured because of – (1) reflection (2) interference (3) diffraction (4) polarization
Last Answer : (2) interference Explanation: A thin oil film on a water surface appears coloured because of thin-film interference which involves the interference of light waves reflecting off the top surface of a film with the waves reflecting from the bottom surface.
Description : A pond of water appears less deep due to – (1) Reflection (2) Diffraction (3) Refraction (4) Polarization
Last Answer : (3) Refraction Explanation: The apparent depth will look less that its real depth due to the refraction of light. First of all, imagine an object at the bottom of the pond, emitting three beams of light ... eye, and as such perfectly vertical, will not bend one way or another as it leaves the water.
Description : A soap bubble shows colours when illuminated with white light. This is due to – (1) Diffraction (2) Polarization (3) Interference (4) Reflection
Last Answer : (3) Interference Explanation: The iridescent colours of soap bubbles are caused by interfering of (internally and externally) reflected light waves and are determined by the thickness of the film. This phenomenon ... are the same as the phenomenon causing the colours in an oil slick on a wet road.
Description : What is the Polarization index value? (Pi value) and simple definition of polarization index?
Last Answer : Its ratio between insulation resistance (IR) i.e. meggar values for 10min to insulation resistance for 1 min. It ranges from 5-7 for new motors & normally for motor to be in good condition it should be Greater than 2.5.
Description : Longitudinal waves do not exhibit a. Polarization b. Refraction c. Reflection d. Diffraction
Last Answer : a. Polarization
Description : The wavelength of light has no role in a. Diffraction b. Interference c. Polarization d. Reflection
Last Answer : c. Polarization
Description : ______ polarization is employed in FM broadcasting A. Horizontal B. Vertical C. Circular D. Bidirectional
Last Answer : A. Horizontal
Description : _____ polarization is employed in AM broadcasting A. Horizontal B. Vertical C. Circular D. Omnidirectional
Last Answer : B. Vertical
Description : When antennas are closed to the ground, _______ polarization is ideal A. horizontally polarized B. vertically polarized C. circularly polarized D. both A and B
Last Answer : B. vertically polarized