A. orthorhombic

B. hexagonal

D. linear

A. none of the above

B. transfer of electrons between atoms

C. sharing of variable number of electrons by a variable number of atoms

A. Aluminium

C. Steel

D. Silver

A. insulator

B. none of the above

C. intrinsic semiconductor

A. high melting point

B. high resistance to corrosion

D. good thermal conductivity

B. none of the above

C. magnetic field

D. electromagnetic field

A. inject more charge carriers

B. increase the kinetic energy of valence electrons

D. all of the above

A. the heat content of the crystal

B. the temperature of the crystal

A. bad-conductor

B. reverse conductor

C. non-conductor

A. unity conductivity

B. none of the above

D. zero conductivity

B. transistors

C. ferrite cores

D. copper conductors

A. decreases

B. remains constant

D. becomes temperature independent

B. toughness

C. none of the above

D. malleability

A. infinite

B. none of the above

C. greater than that of unbounded electron

E. equal to that of unbounded electron

B. none of the above

C. follows Ohms law at low temperatures only

D. result in non-uniform heating

A. speed

B. wave length

D. intensity

A. the electron density varies with temperature

C. the electron gas density varies with temperature

A. negative ions only

C. none of the above

D. positive and negative ions

E. positive ions only

A. resonant waves

C. musical waves

D. microwaves

B. Eureka

C. Nichrome

D. Manganin

B. 9.22K

C. 1.14K

D. 18.0K

B. ACSR conductors

C. aluminium

D. copper

B. Hard drawn copper

C. Induction hardened copper

D. Copper containing traces of silicon

B. tungsten and silver

C. copper and tungsten

D. silver and tin

A. either A. or (b)

B. none of the above

C. space lattice

A. increases

B. decreases

A. transition temperature

C. none of the above

D. critical magnetic field

A. kanthal

B. copper

C. nichrome

A. Age hardening

B. Alloying

D. Temperature

E. Cold work

A. magnetic field strength

B. temperature

C. either (A) or (B)

A. a wire of platinum

B. a ceramic tube having carbon rod inside it

D. a heavy cross-section of copper or aluminium

A. Both have great tendency for oxidation

B. Both have low melting point

C. Very large length of wires will be required

B. malleable iron

C. cast iron

D. low carbon steel

A. one

B. more than one

C. negative

A. Silicon

B. Organic polymers

A. Size

B. Pressure

D. Temperature

B. Silver nitrate

C. Silicon-iron

D. Small particles of iron

A. transformer, motor and generator windings

B. transmission and distribution lines

C. house wiring

A. none of the above

B. a.c. and high frequency

C. frequencies having no effect

D. infrared frequencies

A. Constantan

B. Molybdenum

C. Kanthal

B. decrease dielectric constant

C. increase dielectric loss

D. decrease insulation resistance

E. decrease dielectric strength

A. any of the above

B. reducing temperatures

D. adding impurities

A. conductors

B. semiconductors

C. insulators

B. Proton

C. Neutron

D. None of the above

A. 4ns

B. 2n3

C. 4n2

A. 0.15 eV

C. 0.25 eV

D. 0.5eV

A. aluminium

C. copper

D. kanthal

A. carbon rod serves as conductor

B. carbon can resist the attack of battery acid

D. either (A) or (B)

A. electric arc furnace

C. dry cells

D. cinema projectors

A. Carbon

C. Tungsten

D. Aluminium