Description : Those materials are well suited for making permanent magnets which have _____ retentivity and _______ coercivity.
Last Answer : Those materials are well suited for making permanent magnets which have high retentivity and high coercivity.
Last Answer : The materials having low retentivity are suitable for making temporary magnets.
Description : Materials subjected to rapid reversal of magnetism should have (a) large area oiB-H loop (b) high permeability and low hysteresis loss (c) high co-ercivity and high retentivity (d) high co-ercivity and low density
Last Answer : (b) high permeability and low hysteresis loss
Description : Hard magnetic materials are used for making (A) Permanent magnets. (B) Temporary magnets. (C) Conductors. (D) Insulator.
Last Answer : (A) Permanent magnets.
Description : The use of permanent magnets is. not made in (a) magnetoes (6) energy meters (c) transformers (d) loud-speakers
Last Answer : (c) transformers
Description : Permanent magnets are generally made of
Last Answer : Alnico alloys
Description : The most suitable metal for making permanent magnet is a) Iron b) Steel c) Silver d) Copper
Last Answer : a) Iron
Description : The energy required to magnetize and demagnetize is called a) Saturation b) Retentivity c) Coercivity d) Hysteresis loss
Last Answer : d) Hysteresis loss
Description : Hard steel is suitable for making permanent magnets because?
Last Answer : Hard steel is suitable for making permanent magnets because it has good residual magnetism.
Description : Pick out the wrong statement. (A) A ferromagnetic material becomes paramagnetic above the 'Curie temperature' (B) Permanent magnets are made of hard materials, whereas electromagnets require soft ... hysterisis loss and coercive forces (D) Tungsten steel and alnico are not hard magnetic materials
Last Answer : Option D
Description : Permanent magnets are made of (A) soft magnetic materials. (B) hard magnetic materials. (C) semi conductors. (D) super conductors.
Last Answer : (B) hard magnetic materials.
Description : The materials used for permanent magnets should have
Last Answer : The materials used for permanent magnets should have high retentivity, high coercivity
Description : Hard ferrites are used for making (A) Transformer cores. (B) Electrical machinery. (C) High frequency equipment. (D) Light weight permanent magnets.
Last Answer : (D) Light weight permanent magnets.
Description : Which one of the following materials is useful for making bulb filaments? a. aluminum b. Iron c. Copper d. Tungsten
Last Answer : a. aluminum
Description : Michael Faraday was known by his work on: (a) Electric force (b) Weak nuclear force (c) Strong nuclear force (d) Gravitational force
Last Answer : (a) Electric force
Last Answer : Temporary magnets are used in loud-speakers,generators, motors.
Description : Magnetic flux linked with a coil can be changed by using an: a. Permanent magnet b.Bar magnet c. Electromagnet d. Horseshoe magnet
Last Answer : b.Bar magne
Description : In motor a permanent magnet provides: a. Electric field b. electric flux c. magnetic field d. gravitational field
Last Answer : d. gravitational field
Description : One of the potential health effects of exposure to high levels of noise is called tinnitus (pron: ti - NI - tes), which means: w) a permanent loss of hearing. x) a persistent ringing ... ) a temporary loss of hearing, especially of upper frequencies. z) abdominal discomfort from low frequency noise.
Last Answer : ANSWER: X -- A PERSISTENT RINGING OR HISSING IN THE EARS AFTER EXPOSURE.
Description : What permanent magnets can affect?
Last Answer : Both permanent magnets and electromagnets. -Apex
Description : Permanent magnets can be made from A. Aluminum B. Lead C. Zinc D. Cobalt
Last Answer : ANSWER: D
Description : Permanent magnets are made of high carbon steel and (A) 15% of cobalt (B) 20% of cobalt (C) 35% of cobalt (D) 45% of cobalt
Last Answer : Answer: Option D
Description : Permanent magnets are normally made of?
Last Answer : Permanent magnets are normally made of alnico alloys.
Description : Which is the most suitable power device for high frequency ( more 100 kHz) switching application? a) Power MOSFET b) BJT c) SCR d) UJT
Last Answer : Ans: Power MOSFET
Description : Paramagnetic materials have relative permeability (a) slightly less than unity (b) equal to unity (c) slightly more than unity (d) equal to that ferromagnetic mate rials
Last Answer : (c) slightly more than unity
Description : Ferrites are materials. (a) paramagnetic (b) diamagnetic (c) ferromagnetic (d) none of the above
Last Answer : (c) ferromagnetic
Description : Whichofthe followingterms describesthe reason thatlightisrefractedat different angles? a. Photon energy changes with wavelength b. Light is refracted as a function of surface smoothness c. The angle is determined partly by a and b d. The angle is determined by the index of the materials
Last Answer : d. The angle is determined by the index of the materials
Description : Classify electrical materials.
Last Answer : Classification of electrical materials: i) Conducting Materials ii) Insulating materials iii) Magnetic materials iv) Semiconducting materials
Description : What is retentivity?
Last Answer : The ability of a material to retain magnetism
Last Answer : The retentivity (a property) of material is useful for the construction of permanent magnets.
Description : The unit of retentivity is?
Last Answer : The unit of retentivity is weber/sq. m.
Description : Which one is the best material for making connecting wires? a. Iron b. Tungsten c. Silver d. Copper
Last Answer : d. Copper
Description : If you lost a front tooth and had to wait 4-8 weeks for a permanent replacement, would you spend $400-700 for a temporary tooth to fill the gap during the wait?
Last Answer : No. I would rather spend the money on audio books.
Description : Are the benefits temporary or permanent for revaulting collections in Mafia Wars?
Last Answer : Temporary. I don’t bother.
Description : By which reason temporary and permanent hardness occur ?
Last Answer : By which reason temporary and permanent hardness occur ?
Description : Assertion: Bleaching action of `SO_(2)` is temporary whereas bleaching action of `Cl_(2)` is permanent. Reason: Bleaching by `SO_(2)` and `Cl_(2)` is
Last Answer : Assertion: Bleaching action of `SO_(2)` is temporary whereas bleaching action of `Cl_(2)` is permanent. ... )` and `Cl_(2)` is due to oxidation.
Description : How long do my temporary plates last before I need to purchase permanent ones?
Last Answer : The temp plates lasts for up to a year before you need to get new ones. You must be in the process in getting the permanent ones so they will easily handoff.
Description : Going from Temporary to Permanent in Your Temp Admin Position?
Last Answer : Many businesses looking to hire administrative staff turn to temp admins to fill open positions. This temporary workforce helps to ease the company's administrative burdens while allowing the company to save on ... remember to act professionally, be a part of the team and put your best foot forward.
Description : What is the difference between non-volatile memory and storage is that the memory is__________ and storage is_________.A. temporary, permanentB. permanent, temporaryC. slow, fastD. none of the above?
Last Answer : A
Description : Which of the following terms is the most closely related to main memory? A) Non volatile B) Permanent C) Control unit D) Temporary
Last Answer : Answer : D
Description : Which of the following is not valid statement? A) Hard is referred to mean something temporary B) Hard is used to mean something tangible C) Soft is used to mean something permanent D) Soft is used to mean something tangible
Last Answer : Answer : B
Description : Which of the following terms is the most closely related to main memory? A. Non Volatile B. Permanent C. Temporary D. None of the Above
Last Answer : C. Temporary
Description : _________ is the transfer of computer data from a temporary storage area to the computer’s permanent memory. A. Flash B. Virtual C. Buffer Flush D. None of the Above
Last Answer : C. Buffer Flush
Description : What is the difference between a TEMPORARY tablespace and a PERMANENT tablespace?
Last Answer : A temporary tablespace is used for temporary objects such as sort structures while permanent tablespaces are used to store those objects meant to be used as the true objects of the database.
Description : Which compounds are responsible for permanent and temporary hardness of water?
Last Answer : Ans-Permanent hardness is due to chlorides and sulphates of calcium and magnesium While temporary hardness is due to bicarbonates of calcium and magessium.
Description : What is a project? A. A permanent endeavor that consumes resources, has objectives based on specifications, and consumes resources. (Ans.) B. A temporary endeavor which uses a series of ... , defined start and end dates, have funding limits, consume resources, and create a lasting outcome.
Last Answer : A. A permanent endeavor that consumes resources, has objectives based on specifications, and consumes resources. (Ans.)
Description : Magnetic field can be produced by using A. permanent magnet B. electric current C. temporary magnet D. both A and B
Last Answer : permanent magnet
Description : The basic nature of a project is a/an _____ one. (A) permanent (B) temporary (C) (A) or (B) (D) Both (A) and (B)
Last Answer : (B) temporary
Description : The amount of current assets that varies with seasonal requirements is referred to as working capital. A. permanent B. net C. temporary D. gross
Last Answer : C. temporary