A. easy solderable and drawable quality

C. highest conductivity

D. good corrosion resistance

E. good mechanical strength

F. lowest temperature co-efficient

A. Less liability to break

B. Less liability to kink

D. Greater flexibility

A. manufacture of bubble memories

B. generating regions free from magnetic field

C. generating electrostatic field

A. electrical contacts

C. thermocouple

D. grids of special purpose vacuum tubes

E. heating element in high temperature furnace

B. Contact pressure

C. Excessive sparking

D. Speed of the machine

E. Surface conditions of brush and commutator

A. Viscosity

C. Porosity

D. Solubility

A. either (A) or (B)

C. none of the above

D. the number of valence electrons per atom

A. Silver-German silver

B. Iron-steel

D. Aluminium-tin

A. Holes can be considered as a net positive charge

B. Holes may constitute an electric current

C. Holes can exist in certain semiconductors only

A. negative real value

C. positive real value

D. complex value

A. Germanium

B. A donor

C. Silicon

A. small

C. any of the above

D. nil

B. Aluminium is a noble metal

C. No reaction with oxygen occurs ft Any of the above

A. Platinum

B. Copper

C. Nichrome

A. Fe203

C. AI2O3

D. B2O3

B. the electrons jump into nucleus at 0K

C. none of the above

D. all electrons interact in the super-conducting state

A. 2

B. 12

C. 4

B. does not change

C. decreases

A. Vander Waals

B. metallic

D. covalent

A. Aluminium

C. Copper

D. Steel reinforced copper

B. heating elements

C. incandescent lamps

D. precision instruments

E. motor starters

A. copper

B. aluminium

D. copper and silver

E. platinum and gold

A. Glass

B. Asbestos

D. Slate

A. 2

C. 4

D. 8

A. a liquid

B. a metal

D. a gas

A. nickel, copper and zinc

B. silver, copper and lead

C. copper and aluminium

B. easy solderable and drawable quality

C. lowest temperature co-efficient

D. good corrosion resistance

E. good mechanical strength

A. negative ions only

B. positive and negative ions

D. positive ions only

A. P-type

B. N-type

C. extrnisic

A. Length of the conductor

B. Resistance of the conductor

D. Area of the conductor section

A. Gallium-arsenide

B. Selenium

C. Germanium

A. smoky and dirty atmosphere

B. humidity in the atmosphere

D. neither (A) nor (b)

A. Diamond

B. High speed steel

C. Mild steel

A. eddy currents

B. resistance

C. coupling co-efficient

A. core wire of ACSR

B. earth wire

C. overhead telephone wire

B. reverse biasing voltage

C. the amount of doping

D. forward biasing voltage

A. compact

B. inexpensive

D. easy to make

A. Glass

C. Neoprene

D. Corrundum

A. Where corrosive chemical action exists

C. Where high temperature exists

D. Where lubrication is difficult or im-possible

B. Tin-lead

C. None of the above

D. Tin-silver-lead

A. Aluminium has lower resistivity than that of copper

C. Aluminium has less temperature co-efficient than copper

D. Aluminium is more ductile and malleable than copper

A. Phosphorous

B. Rubber

C. Aluminium

A. Non-metal solids except carbon

B. Air and most other gases

C. Pure water and liquids in general except mercury

A. increasing its temperature

C. increasing its vibration

D. decreasing its vibration

A. carbon crystals

B. pulverized coal

C. solid carbon granules

A. copper windings are less bulky and the machines become compact

B. copper points offer low contact resistance

D. copper can be easily soldered and welded

A. Cast-iron

B. Glass

C. Graphite

A. less than

B. any of the above

D. equal to

A. any of the above

C. remain unchanged

D. decrease

A. 8

C. 1

D. 4