Description : Glass is - (1) Super cooled liquid (2) Crystalline solid (3) Liquid crystal (4) None of these
Last Answer : (1) Super cooled liquid Explanation: Glass is sometimes called a Super cooled liquid because it does not form a crystalline structure, but instead forms an amorphous solid that allows molecules in the material to continue to move.
Description : Solids may be considered to be either crystalline noncrystalline. The basic difference between them is that a crystal, in contrast to a noncrystal: w) has a sharp melting point x) has an irregular array of atoms y) exhibits double refraction z) has a completely regular atomic or molecular structure
Last Answer : ANSWER: Z -- HAS A COMPLETELY REGULAR ATOMIC OR MOLECULAR STRUCTURE
Description : Describe with the help of diagram the working of crystal type microphone.
Last Answer : Working:-The crystal microphone works on the principle of piezo electric effect. When pressure is applied to any of these crystals electricity is generated, and if an electric charge ... to the crystal unit will generate an electric potential which is proportional to applied pressure.
Description : What purpose does a microphone perform in an AM transmitter?
Last Answer : It converts audio (sound) into electrical energy.
Description : What is the difference between a dynamic microphone and a magnetic microphone?
Last Answer : A dynamic microphone has a moving coil and the magnetic microphone has a moving armature.
Description : What is a major disadvantage of a carbon microphone?
Last Answer : Background hiss resulting from random changes in the resistance between individual carbon granules.
Description : What special electromechanical effect is the basis for carbon microphone operation?
Last Answer : The changing resistance of carbon granules as pressure is applied to them.
Description : What is a microphone?
Last Answer : An energy converter that changes sound energy into electrical energy.
Description : Which of the following is NOT a physical property of crystalline boron? w) brown color x) diamond hardness y) brittleness z) high electrical resistance
Last Answer : ANSWER: W -- BROWN COLOR (Crystalline boron is transparent.)
Description : What is the name given to a doped germanium crystal with an excess of free holes?
Last Answer : P-type crystal.
Description : What is the impedance of a crystal at its resonant frequency when it is used in the series mode?
Last Answer : Minimum.
Description : What is the impedance of a crystal at its resonant frequency when it is used in the parallel mode?
Last Answer : Maximum
Description : During the manufacture of a point-contact diode, what is the purpose of passing a relatively large current from the catwhisker to the silicon crystal?
Last Answer : . To form a small region of p-type material
Description : What is the function of a crystal filter in a receiver?
Last Answer : It is used to achieve maximum selectivity.
Description : What does the liquid crystal display require for computer applications?
Last Answer : An external light source, called a backlight.
Description : What is the basic optical-material property relevant to optical fiber light transmission?
Last Answer : The index of refraction.
Description : The behaviour of visco-elastic material is time dependent. This behaviour is common in __________ materials. (A) Non-crystalline solid (B) Crystalline (C) Rubbery (D) Non-crystalline organic polymeric
Last Answer : (D) Non-crystalline organic polymeric
Description : Common house hold glass (i.e., soda-lime glass) is a/an __________ material. (A) Fully crystalline (B) Partly crystalline (C) Amorphous
Last Answer : (B) Partly crystalline
Description : For continuous drying of granular or crystalline material, the dryer used is the __________ dryer. (A) Tunnel (B) Tray (C) Rotary (D) None of these
Last Answer : (C) Rotary
Description : (2) stabilise the colloid and prevent crystallisation Explanation: Gelatine, being a colloid, has the property of preventing crystallization. In ice lollies and icecream this is demonstrated by the formation ... does not become grainy or sandy due to the slow crystallisation of lactose with time.
Last Answer : Glycol is added to aviation gasoline because it - (1) reduces evaporation of petrol (2) increases efficiency of petrol (3) prevents freezing of petrol (4) reduces consumption of petrol
Description : Nickel as a material of construction (A) Is used as an alloying element for both ferrous & non-ferrous alloys (B) Is paramagnetic below 415° C (its Curie temperature) (C) Diamagnetic (D) Has a body centred cubic (bcc) crystal lattice structure
Last Answer : (A) Is used as an alloying element for both ferrous & non-ferrous alloys
Description : Pick out the wrong statement. (A) The X-rays cannot be deflected by electric field unlike cathode rays (B) The intensity of X-rays can be measured by ionisation current produced due to the ... the anode-cathode voltage (D) Crystal structure of a material can be studied by an electron microscope
Last Answer : (C) The quality of X-rays can be controlled by varying the anode-cathode voltage
Description : Liquid crystal elastomers 4D printing material achieve their activation due to a. Light b. Heat c. Electrical d. All of the above
Last Answer : Ans:- d. All of the above
Description : X-ray films have an emulsion on one or both sides of a support material. The emulsion contains particles of, A. Silver nitrate crystal B. Metallic silver in gelatine C. Silver bromide in gelatine D. Silver nitrate in gelatine E. Potassium bromide in gelatine
Last Answer : C. Silver bromide in gelatine
Description : When a waveguide is terminated in a resistive load, the load must be matched to what property of the waveguide?
Last Answer : . Characteristic impedance.
Description : The varactor displays what useful electrical property?
Last Answer : Variable capacitance.
Description : What resistance property is found in tunnel diodes but not in normal diodes?
Last Answer : Negative resistance.
Description : The power gain of an antenna is directly related to what other antenna property?
Last Answer : Directivity.
Description : What fiber property directly affects splice loss in fusion splicing?
Last Answer : The angles and quality of the two fiber-end faces.
Description : The underlying principle of operation of the parametric amplifier is based on what property?
Last Answer : Reactance.
Description : What causes the negative-resistance property of tunnel diodes?
Last Answer : The tunneling action
Description : When the repealer potential is constant, what property of the electron determines how long it will remain in the drift space of the reflex klystron?
Last Answer : Velocity.
Description : The kinetic energy of an electron is directly proportional to what property?
Description : Moving tube electrodes apart to decrease interelectrode capacitance causes an increase in the effect of what property?
Last Answer : Transit time
Description : Operation of an accelerometer is based on what physical property?
Last Answer : Inertia.
Description : What gyro property causes the gyro to remain in a fixed position?
Last Answer : Rigidity.
Description : What fiber property does numerical aperture (NA) measure?
Last Answer : NA measures the light-gathering ability of an optical fiber.
Description : Meridional rays are classified as either bound or unbound rays. Bound rays propagate through the fiber according to what property?
Last Answer : Total internal reflection.
Description : What electrical property does an ammeter measure?
Last Answer : Current.
Description : What electrical property is used by all the meter movements discussed so far?
Description : The various properties of a transmitting antenna can apply equally to the same antenna when it is used as a receiving antenna. What term is used for this property?
Last Answer : Reciprocity of antennas.
Description : In what three components of Earth's makeup must we find the total mass of crystalline rock components that were eroded from the primary crystalline rocks of earth's surface?
Last Answer : answer:What are the components of Earth’s makeup? How many are there? Wouldn’t it be the components nearest the surface (e.g., crust, lithosphere, asthenosphere)? Keep in mind, I have no idea what I’m talking about.
Description : The Peninsular plateau is a tableland composed of the old crystalline, igneous and metamorphic rocks. What do CRYSTALLINE ROCKES mean here? -Geography
Last Answer : Crystalline rock, any rock composed entirely of crystallized minerals without glassy matter. Metamorphic rocks are almost always crystalline; the term crystalline schists has been applied to indicate all rocks ... origin, and thus the term crystalline rocks may be taken to mean an igneous origin.
Description : Which is a part of the eye that helps in changing the focal length of crystalline lensis? -Do You Know?
Last Answer : answer:
Description : What is the composition of crystalline water in blue vitriol ?
Last Answer : : Blue vitriol's crystal water content is 36.06%.
Description : A yellow coloured crystalline substance gave a colourless gas `X` on reaction with fluorine, which is thermally stable and has octahedral geometry. `X
Last Answer : A yellow coloured crystalline substance gave a colourless gas `X` on reaction with fluorine, which is ... and has octahedral geometry. `X` can be
Last Answer : A yellow coloured crystalline substance gave a colourless gas `X` on reaction with fluorine, which is thermally stable ... `SF_(2)` D. `S_(2)F_(6)`
Description : White crystalline solid (A) reacts with `H_2` to form a highly associated liquid (B) and a monoatomic , colourless gas (C ). The liquid (B) is used fo
Last Answer : White crystalline solid (A) reacts with `H_2` to form a highly associated liquid (B) and a ... has only unpaired electron in `pi` molecular orbital.