Description : The magnetic materials follow which law? a) Faraday’s law b) Ampere law c) Lenz law d) Curie Weiss law
Last Answer : d) Curie Weiss law
Description : Which one of the following laws will not contribute to the Maxwell’s equations? a) Gauss law b) Faraday law c) Ampere law d) Curie Weiss law
Description : Curie-Weiss law is used to calculate which one of the following? a) Permittivity b) Permeability c) Electric susceptibility d) Magnetic susceptibility
Last Answer : d) Magnetic susceptibility
Description : Quartz is a __________ material. (A) Diamagnetic (B) Ferromagnetic (C) Ferroelectric (D) Piezoelectric
Last Answer : Option D
Description : The induced emf in a material opposes the flux producing it. This is a) Faraday law b) Ampere law c) Lenz law d) Curie law
Last Answer : c) Lenz law
Description : Piezoelectric effect is analogous to which phenomenon? a) Electrostriction b) Magnetostriction c) Anisotropy d) Magnetization
Last Answer : b) Magnetostriction
Description : The Snell law is applicable for perpendicular polarisation and the Brewster law is applicable for parallel polarisation. State True/False. a) True b) False
Last Answer : a) True
Description : Find the susceptibility when the curie constant is 0.2 and the difference in critical temperature and paramagnetic curie temperature is 0.01. a) 2 b) 20 c) 0.02 d) 200
Last Answer : b) 20
Description : The converse of magnetostriction is called the a) Magnetization b) Magnetic anisotropy c) Villari effect d) Curie effect
Last Answer : c) Villari effect
Description : Ferroelectric materials are characterised by (A) Very high degree of polarisation. (B) A sharp dependence of polarisation on temperature. (C) Non-linear dependence of the charge Q on the applied voltage. (D) All the above.
Last Answer : (D) All the above.
Description : Dielectric materials are (A) Insulating materials. (B) Semiconducting materials. (C) Magnetic materials. (D) Ferroelectric materials.
Last Answer : (A) Insulating materials.
Description : List any two materials for Piezoelectric transducer.
Last Answer : i) Quartz crystal, ii) Barium titanete , iii) Rochelle salt , iv) Lithium Sulphate, v) Potassium Dihydrogen phosphate.
Description : Piezoelectric materials serve as a source of _____ .
Last Answer : Piezoelectric materials serve as a source of ultrasonic waves.
Description : Which of the following crushing laws is most accurately applicable to the fine grinding of materials? (A) Bond's crushing law (B) Kick's law (C) Rittinger's law (D) None of these
Last Answer : (C) Rittinger's law
Description : Nickel is a __________ material. (A) Ferromagnetic (B) Semi-conductor (C) Paramagnetic (D) Ferroelectric
Last Answer : (A) Ferromagnetic
Description : Choose the optical fibre material from the given materials. a) Glass b) Plastic c) Silica d) Quartz
Last Answer : c) Silica
Description : Skin depth phenomenon is found in which materials? a) Insulators b) Dielectrics c) Conductors d) Semiconductors
Last Answer : c) Conductors
Description : A boundary of separation between two magnetic materials is identified by which factor? a) Change in the permeability b) Change in permittivity c) Change in magnetization d) Conduction
Last Answer : a) Change in the permeability
Description : Which of the following materials is ferrimagnetic? a) Fe b) Sn c) Fe 2 O 3 d) FeCl
Last Answer : c) Fe 2 O 3
Description : In ferromagnetic materials the susceptibility is infinity. State True/False a) True b) False
Description : The materials having very small susceptibility at all temperatures are a) Antiferromagnetic b) Diamagnetic c) Ferromagnetic d) Paramagnetic
Last Answer : a) Antiferromagnetic
Description : In which materials the magnetic anisotropy is followed? a) Diamagnetic b) Paramagnetic c) Ferromagnetic d) Ferromagnetic
Last Answer : c) Ferromagnetic
Description : In isotropic materials, which of the following quantities will be independent of the direction? a) Permittivity b) Permeability c) Polarisation d) Polarizability
Last Answer : a) Permittivity
Description : The superconducting materials will be independent of which of the following? a) Magnetic field b) Electric field c) Magnetization d) Temperature
Last Answer : b) Electric field
Description : Under the influence of electric field, the dielectric materials will get charged instantaneously. State True/False. a) True b) False
Description : Ceramic materials possess which of the following properties? a) Brittle and low dielectric constant b) Rigid and low dielectric constant c) Brittle and high dielectric constant d) Rigid and high dielectric constant
Last Answer : c) Brittle and high dielectric constant
Description : The transition temperature at which all the ferromagnetic materials become paramagnetic materials is termed as the 'Curie temperature'. Its value for cobalt is __________ °C. (A) 768 (B) 1127 (C) 1359 (D) 1480
Last Answer : (B) 1127
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
Description : Heating of ferromagnetic materials to a temperature above Curie temperature makes it (A) Insulator for heat & electricity transmission (B) Ferritic (C) Behave like paramagnetic materials (D) Superconductor
Last Answer : Option C
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
Description : What was Erich Weiss better known as?
Last Answer : Harry Houdini
Description : What is the Nationality of surname Weiss?
Last Answer : A German surname meaning 'white' from Middle High German 'Wiz'meaning white/blond. There is also an Old High German word 'wis'meaning wise or clever.
Description : Mallory-Weiss tear?
Last Answer : DefinitionA Mallory-Weiss tear occurs in the mucous membrane of the esophagus, where it connects to the stomach. The tear may bleed.Alternative NamesMucosal lacerations - gastroesophageal junctionCauses ... ) showing a tear with bleedingTreatmentThe tear usually heals in about 10 days without
Description : The Nobel Prize in Physics 2017 win by: (a) Rainer Weiss, Barry C. Barish, Kip S. Throne (b) Jeffrey C. Hall, Michael Rosbash, Michael W. Young (c) Kazuo Ishiguro (d) None of These
Last Answer : (a) Rainer Weiss, Barry C. Barish, Kip S. Throne
Description : What was Erich Weiss better known as
Description : The Snell’s law is given by a) N1 sin θi = N2 sin θt b) N2 sin θi = N1 sin θt c) sin θi = sin θt d) N1 cos θi = N2 cos θt
Last Answer : a) N1 sin θi = N2 sin θt
Description : The Snell’s law can be derived from which type of incidence? a) Incidence angle b) Reflected angle c) Refracted angle d) Oblique incidence
Last Answer : d) Oblique incidence
Description : The propagation of the electromagnetic waves can be illustrated by a) Faraday law b) Ampere law c) Flemming rule d) Coulomb law
Last Answer : c) Flemming rule
Description : The Gauss law for magnetic field is valid in a) Air b) Conductor c) Dielectric d) All cases
Last Answer : d) All cases
Description : The Gauss law employs which theorem for the calculation of charge density? a) Green theorem b) Stokes theorem c) Gauss theorem d) Maxwell equation
Last Answer : c) Gauss theorem
Description : Maxwell second equation is based on which law? a) Ampere law b) Faraday law c) Lenz law d) Coulomb law
Last Answer : a) Ampere law
Description : Find the Maxwell first law value for the electric field intensity is given by A sin wt az a) 0 b) 1 c) -1 d) A
Last Answer : a) 0
Description : The first Maxwell law is based on which law? a) Ampere law b) Faraday law c) Lenz law d) Faraday and Lenz law
Last Answer : b) Faraday law
Description : Ampere law states that, a) Divergence of H is same as the flux b) Curl of D is same as the current c) Divergence of E is zero d) Curl of H is same as the current density
Last Answer : d) Curl of H is same as the current density
Description : The Faraday’s law states about which type of EMF? a) Transformer EMF b) Back EMF c) Generator EMF d) Secondary EMF
Last Answer : a) Transformer EMF
Description : Find the Maxwell law derived from Ampere law. a) Div(I) = H b) Div(H) = J c) Curl(H) = J d) Curl(B) = D
Last Answer : c) Curl(H) = J
Description : Find the Maxwell equation derived from Faraday’s law. a) Div(H) = J b) Div(D) = I c) Curl(E) = -dB/dt d) Curl(B) = -dH/dt
Last Answer : c) Curl(E) = -dB/dt
Description : The Ampere law is based on which theorem? a) Green’s theorem b) Gauss divergence theorem c) Stoke’s theorem d) Maxwell theorem
Last Answer : c) Stoke’s theorem
Description : The point form of Ampere law is given by a) Curl(B) = I b) Curl(D) = J c) Curl(V) = I d) Curl(H) = J
Last Answer : d) Curl(H) = J
Description : According to Faraday’s law, EMF stands for a) Electromagnetic field b) Electromagnetic force c) Electromagnetic friction d) Electromotive force
Last Answer : d) Electromotive force