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Electrical Engineering Objective Questions { Material And Components }

50. When the heating coil in 1000 watt heater is reduced to half its length, the power consumed will be
A. 1000 watts
B. 500 watts
C. 2000 watts
D. 4000 watts

51. The main advantage of iron-nickel battery over lead-acid battery is that
A. iron nickel battery has higher cell voltage
B. it needs less maintenance
C. it is much cheaper
D. it has higher efficiency

52.  A high Q coil has
A. large bandwidth
B. high losses
C. low losses
D. flat response

53. Most versatile compound semiconductor is
A. Gallium antomonide
B. Indium phosphide
C. Lead sulfide
D. Gallium arsenide

54. An ideal conducting material has
A. zero conductivity
B. small conductivity
C. large conductivity
D. infinite conductivity

55.  Superconductors are
A. monovalent metals
B. ferromagnetic and antiferromagnetic metals
C. ferrimagnetic metals
D. amorphour thin films of Be, Bi and Fi.

56. Soft superconductor follow
A. Silsbee's rule alone
B. Meissner effect alone
C. both (a) and (b) above
D. none of the above

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