Carbon resistors are used extensively because they are____________?

Related Mcqs:

1. Carbon electrodes are not used in_______________?

   A. GLS lamps B. electric arc furnace C. dry cells D. cinema projectors...

2. A carbon resistor contains_____________?

   A. carbon crystals B. solid carbon granules C. pulverized coal D. finely divided carbon black...

3. Carbon rods are used in wet and dry cells because_____________?

   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)...

4. 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...

5. The carbon percentage is least in__________________?

   A. low carbon steel B. wrought iron C. cast iron D. malleable iron...

6. Commonly used conducting materials are_____________?

   A. copper B. aluminium C. both (A) and (B) D. copper and silver E. platinum and gold...

7. An H.R.C. fuse is_______________?

   A. a ceramic body having metal and caps B. a wire of platinum C. a heavy cross-section of copper or aluminium D. a ceramic tube having carbon rod inside it...

8. In thermocouples which of the following pairs is commonly used ?

   A. Copper-constantan B. Aluminium-tin C. Silver-German silver D. Iron-steel...

9. The conductivity of a metal is determined by____________?

   A. the electronic concentration and the mobility of the free electrons B. the number of valence electrons per atom C. either (A) or (B) D. none of the above...

10. The photo-electric effect occurs only when the incident light has more than a certain critical____________?

    A. intensity B. speed C. frequency D. wave length...