On which of the following effects of electric current a fuse operates ?

Related Mcqs:

1. H.R.C. fuse, as compared to a rewirable fuse, has_________________?

   A. no ageing effect B. high speed of operation C. high rupturing capacity D. all of the above...

2. By which of the following methods major portion of the heat generated in a H.R.C. fuse is dissipated ?

   A. Radiation B. Convection C. Conduction D. All of the above...

3. The main function of a fuse is to_____________?

   A. protect the line B. open the circuit C. protect the appliance D. prevent excessive currents E. none of the above...

4. A fuse is never inserted in____________?

   A. neutral wire B. negative of D.C. circuit C. positive of D.C. circuit D. phase dine...

5. The fuse wire, in D.C. circuits, is inserted in____________?

   A. negative circuit only B. positive circuit only C. both (A) and (B) D. either (A) or (B)...

6. A fuse is connected_______________?

   A. in series with circuit B. in parallel with circuit C. either in series or in parallel with circuit D. none of the above...

7. The material used for fuse must have_____________?

   A. low melting point and high specific resistance B. low melting point and -low specific resistance C. high melting point and low specific resistance D. low melting point and any specific resistance...

8. The fuse rating is expressed in terms of_____________?

   A. current B. voltage C. VAR D. kVA...

9. A fuse in a motor circuit provides protection against__________?

   A. overload B. short-circuit and overload C. open circuit, short-circuit and overload D. none of the above...

10. The fuse blows off by___________?

    A. burning B. arcing C. melting D. none of the above...