1 Answer

Answer :

The magnetic materials exhibit the property of magnetisation because of spin of nucleus.

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Last Answer : The ratio of intensity of magnetisation to the magnetisation force is known as susceptibility.

Description : Dipoles in any electric field undergo a) Magnetism b) Electromagnetism c) Magnetisation d) Polarisation

Last Answer : d) Polarisation

Description : The ratio of intensity of magnetisation to the magnetisation force is known as (a) flux density (b) susceptibility (c) relative permeability (d) none of the above

Last Answer : (b) susceptibility

Description : The method of magnetisation is: (1) hammering a magnet (2) heating a magnet (3) passing direct current through it (4) passing alternating current through it

Last Answer :  hammering a magnet

Description : In the process of magnetisation of a bar (1) The entire bulk of the bar gets magnetised (2) Only the surface of the bar gets magnetised (3) Only the ends of the bar get magnetised (4) Only some parts of the outer layers of the bar get magnetised

Last Answer : The entire bulk of the bar gets magnetised

Description : Ceramic materials (A) Are exemplified by clay and mica (B) Are poor electrical conductors due to lack of free electrons (C) Never exhibit polymorphism (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)

Description : The materials which fracture even at small strains are termed as brittle, while those materials which exhibit an appreciable deformation before failure are termed as (A) Rigid (B) Tough (C) Ductile (D) Plastic

Last Answer : Option C

Description : Which one of the following statements is correct? (a) Benign tumours show the property of metastasis. (b) Heroin accelerates body functions. (c) Malignant tumours may exhibit metastasis. (d) Patients who have undergone surgery are given cannabinoids to relieve pain.

Last Answer : (c) Malignant tumours may exhibit metastasis

Description : Many living organisms exhibit the unique property of producing visible light. The compound that is oxidized with subsequent light emission is usually referred to as luciferin. What is the enzyme which catalyzes the reaction known as?

Last Answer : ANSWER: Luciferase

Description : Many living organisms exhibit the unique property of producing visible light. What term is used to describe this phenomena? 

Last Answer : ANSWER: Bioluminescence or photoluminescence

Last Answer : slightly more than unity

Last Answer : Materials subjected to rapid reversal of magnetism should have high permeability and low hysteresis loss.

Last Answer : The materials having low retentivity are suitable for making temporary magnets.

Last Answer : Effect of moisture on the insulating materials is to decrease dielectric constant, decrease dielectric strength, decrease insulation resistance, increase dielectric loss.

Last Answer : Low resistivity materials are used in transformer, motor and generator windings, transmission and distribution lines, house wiring.

Description : Piezoelectric materials serve as a source of _____ .

Last Answer : Piezoelectric materials serve as a source of ultrasonic waves.

Description : High resistivity materials are used in?

Last Answer : High resistivity materials are used in precision instruments, heating elements, motor starters, incandescent lamps.

Description : The critical temperature above which the ferromagnetic materials loose their magnetic property is known as (A) hysterisis. (B) Curie point. (C) transition temperature. (D) standard temperature.

Last Answer : (B) Curie point

Last Answer : The retentivity (a property) of material is useful for the construction of permanent magnets.

Last Answer : Hygroscopicity is the property of absorbing moisture from atmosphere.

Description : The structure sensitive property of a super conductor is

Last Answer : The structure sensitive property of a super conductor is critical current density.

Last Answer : The stray line of magnetic flux is defined as a line of magnetic flux which does not follow the designed path.

Last Answer : It assures a position which follows a line of magnetic flux

Last Answer : The magnetic reluctance of a material decreases with increasing cross-sectional area of the material.

Last Answer : The uniform magnetic field is the field in which all lines of magnetic flux are parallel and equidistant.

Last Answer : Magnetic moment is a vector quantity.

Description : A rectangular magnet of magnetic moment M is cut into two piece of same length, the magnetic moment of each piece will be

Last Answer : A rectangular magnet of magnetic moment M is cut into two piece of same length, the magnetic moment of each piece will be M/2.

Description : If a copper disc is rotated rapidly below a freely suspended magnetic needle, the magnetic needle shall start rotating with a velocity

Last Answer : If a copper disc is rotated rapidly below a freely suspended magnetic needle, the magnetic needle shall start rotating with a velocity less than that of disc and in the same direction.

Last Answer :  When an iron piece is placed in a magnetic field the magnetic lines of force will bend away from their usual paths in order to pass through the piece.

Last Answer : A material which is slightly repelled by a magnetic field is known as diamagnetic material.

Last Answer : The direction of magnetic lines of force is from north pole to south pole.

Last Answer : A magnetic field exists around moving charges.

Description : ______ is most commonly used for making magnetic recording tape.

Last Answer : Ferric oxide is most commonly used for making magnetic recording tape.

Description : Glomerular capillaries exhibit higher pressure than that in other body capillary bed because

Last Answer : Glomerular capillaries exhibit higher pressure than that in other body capillary bed because A. There ... high resistance D. All of the above

Description : Fruit stored in a cold chamber exhibit longer storage life because – a. exposure to sunlight is prevented b. the concentration of carbon dioxide in the environment is increased c. the rate of respiration is decreased d. there is increase in humidity

Last Answer : c. the rate of respiration is decreased

Description : Fruit stored in a cold chamber exhibit longer storage life because – a. exposure to sunlight is prevented b. the concentration of carbon dioxide in the environment is increased c. the rate of respiration is decreased d. there is increase in humidity

Last Answer : c. the rate of respiration is decreased

Description : Self polymerising acrylic resins differ from heat cured resins because they exhibit: A. Higher molecules weight B. Higher content of residual monomers

Last Answer : B. Higher content of residual monomers

Description : In spite of several angiospermic features Gnetum is a gymnosperm because…. a) polyembryony is a common features b) prothallial cell is present in the male gametophyte c) seed is naked d) stem exhibit anomalous secondary growth

Last Answer : c) seed is naked

Description : If you come across to teach a blind student along with the normal students what type of behaviour you are expected to exhibit? Options: A) Take care of him with sympathy B) Don't give any ... to keep your teaching pace according to him without making the other students suffer D) none of the above

Last Answer : C) Arrange the seat in the front row and try to keep your teaching pace according to him without making the other students suffer

Last Answer : Magnetising steel is normals difficult because it has low permeability.

Last Answer : Copper, even though costly, finds use in the windings of electrical machines because copper points offer low contact resistance , copper can be easily soldered and welded, copper windings are less bulky and the machines become compact.

Last Answer : Carbon rods are used in wet and dry cells because carbon rod serves as conductor, carbon can resist the attack of battery acid.

Last Answer : Carbon resistors are used extensively because they are easy to make, compact, inexpensive.

Last Answer : The resistivity of a metal is a function of temperature because the amplitude of vibration of the atoms varies with temperature.

Description : The malleability of a material is the property by virtue of which it can be rolled or hammered into thin sheets. Which of the following materials has the maximum malleability? (A) Lead (B) Copper (C) Aluminium (D) Wrought iron

Last Answer : (A) Lead

Description : Which of the following property is essential for spring materials? (A) Stiffness (B) Ductility (C) Resilience (D) Plasticity

Last Answer : (C) Resilience

Description : The process of Deposition of Soil Materials (removed from the eluvial horizon) in the lower layer (or horizon of gains having the property of stabilizing translocated clay materials) is termed as? [a] Illuviation [b] Eluviation [c] Podsolisation [d] Mineralisation [e] None of the above

Last Answer : [d] Mineralisation

Description : The malleability of a material is the property by virtue of which it can be rolled or hammered into thin sheets. Which of the following materials has the maximum malleability? (A) Lead (B) Copper (C) Aluminium (D) Wrought iron

Last Answer : Option A

Description : Which property is not required for shaft materials? a. High shear and tensile strength b. Good mach inability c. High fatigue strength d. Good cast ability

Last Answer : d. Good cast ability

Description : The property of materials by which they can be drawn into wires is known as: A) malleability B) elasticity C) creep D) ductility

Last Answer : The property of materials by which they can be drawn into wires is known as: ductility