A. transformer, motor and generator windings
B. transmission and distribution lines
C. house wiring
D. all above applications
A. Kanthal
B. Manganin
C. Nichrome
D. Eureka
A. electrical contacts
B. thermocouple
C. heating element in high temperature furnace
D. grids of special purpose vacuum tubes
E. all of the above
A. overhead telephone wire
B. earth wire
C. core wire of ACSR
D. all of the above
A. Where lubrication is difficult or im-possible
B. Where corrosive chemical action exists
C. Where high temperature exists
D. All of the above
A. Speed of the machine
B. Contact pressure
C. Surface conditions of brush and commutator
D. Excessive sparking
E. All of the above
A. inject more charge carriers
B. reduce the energy gap
C. increase the kinetic energy of valence electrons
D. all of the above
A. easy to make
B. compact
C. inexpensive
D. all of the above reasons
A. Non-metal solids except carbon
B. Air and most other gases
C. Pure water and liquids in general except mercury
D. All of the above
A. carbon rod serves as conductor
B. carbon can resist the attack of battery acid
C. both (A) and (B)
D. either (A) or (B)