Related Questions

The property of a material which enables it to retain the deformation permanently, is called
A Brittleness
B Ductility
C Malleability
D Plasticity
A material is able to retain the deformation permanently by virtue of its
A Elasticity
B Plasticity
C Ductility
D Malleability
The commonly used material for shielding or screening magnetism is
A copper
B aluminium
C soft iron
D brass
The material which can be deformed permanently by heat and pressure is called a
A thermoplastic
B thermoset
C chemical compound
D polymer
Which one of the following phrases best describes residual magnetism?
A Magnetism that remains in the core of an electromagnet after the current through the coil is turned off
B The force of attraction between the poles of a permanent and temporary magnetic field
C The amount of magnetic flux that is not confined to the core material of an electromagnet
D The circular magnetic field that surrounds a conductor carrying a current
E None of the above
Which of the following D.C. generators will be in a position to build up without any residual magnetism in the poles ?
A Series generator
B Shunt generator
C Compound generator
D None of the above
Which of the following layers of the Earth is believed to account for the Earth's magnetism?
A Crust
B Mantle
C Core
D Lithosphere
Following D.C. generator will be in a position to build up without any residual magnetism in the poles
A Series generator
B Shunt generator
C Compound generator
D Self-excited generator
Who among the following is credited to work for the unification of electricity, magnetism and optics field of Physics?
A James Clerk Maxwell
B Michael Faraday
C Haris Christian Oersted
D Isaac Newton
The alloying element which increases residual magnetism and coercive magnetic force in steel for magnets is
A Chromium
B Nickel
C Vanadium
D Cobalt

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