Related Questions

The metal having the lowest temperature coefficient of resistance is
A Gold
B Copper
C Aluminium
D Kanthal
Which of the following materials has a negative temperature coefficient of resistance?
A Copper
B Aluminum
C Carbon
D Brass
The hot resistance of the bulb's filament is higher than its cold resistance because the temperature coefficient of the filament is
A Zero
B Negative
C Positive
D About 2 ohms per degree
The transition temperature at which all the ferromagnetic materials become paramagnetic materials is termed as the 'Curie temperature'. Its value for cobalt is __________ °C.
A 768
B 1127
C 1359
D 1480
The scales form in heat exchanges after a period of operation and provide additional resistance to heat transfer with some heat transfer coefficient . The reciprocal of this scale heat transfer coefficient is called .
A scaling factor
B forming factor
C resisting factor
D fouling factor
The average marks of a student in 10 parers are 80. If the highest and the lowest scores are not considered, the average is 81 . If his highest score is 92. find the lowest.
A 55
B 60
C 62
D None of these
Which of the following material has nearly zero temperature coefficient of resistance?
A Manganin
B Porcelain
C Carbon
D Copper
Which of the following high resistance materials has the highest operating temperature ?
A Kanthal
B Manganin
C Nichrome
D Eureka
A semiconductor has ___________ temperature coefficient of resistance.
A Positive
B Zero
C Negative
D None of the above
At __________ frequencies the parallel R-L circuit behaves as purely resistive.
A Low
B Very low
C High
D Very high

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