A. Copper-constantan
B. Aluminium-tin
C. Silver-German silver
D. Iron-steel
Related Mcqs:
- Thermocouples are mainly used for the measurement of_____________?
A. temperature
B. resistance
C. eddy currents
D. coupling co-efficient - Commonly used conducting materials are_____________?
A. copper
B. aluminium
C. both (A) and (B)
D. copper and silver
E. platinum and gold - ___________ is most commonly used for making magnetic recording tape?
A. Silver nitrate
B. Ferric oxide
C. Small particles of iron
D. Silicon-iron - Which of the following is the poorest conductor of electricity ?
A. Carbon
B. Steel
C. Silver
D. Aluminium - Which of the following materials does not have covalent bonds ?
A. Organic polymers
B. Silicon
C. Metals - Which of the following are non-conductors of electricity?
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 - Carbon bearings are used under which of the following conditions ?
A. Where lubrication is difficult or im-possible
B. Where corrosive chemical action exists
C. Where high temperature exists
D. All of the above - Which of the following materials is the best conductor of electricity ?
A. Tungsten
B. Aluminium
C. Copper
D. Carbon - Spark plug makes use of which of the following materials for insulation ?
A. Porcelain
B. Slate
C. Asbestos
D. Glass - For a hole which of the following statements is incorrect ?
A. Holes can exist in certain semiconductors only
B. Holes can exist in any material including conductors
C. Holes may constitute an electric current
D. Holes can be considered as a net positive charge
