Related Questions

To produce an old photograph, a photographer charges x dollars to make a negative, 3x/5 dollars for each of the first 10 prints, and x/5 dollars for each print in excess of 10 prints. If 45 dollars is the total charge to make a negative and 20 prints from an old photograph, how many dollars the photographer charges to make a negative?
A 3
B 3.5
C 4
D 4.5
To produce an old photograph, a photographer charges x dollars to make a negative 3x/5 dollars for each of the first 10 prints, and x/5 dollars for each print in excess of 10 prints. If 45 dollars is the total charge to make a negative and 20 prints from an old photograph, how many dollars the photographer charges to make a negative?
A 3
B 3.5
C 4
D 4.5
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
Which of the following can have negative temperature coefficient?
A Compounds of silver
B Liquid metals
C Metallic alloys
D Electrolytes
Which one of the following does not have negative temperature coefficient?
A Aluminium
B Paper
C Rubber
D Mica
Which of the following material has nearly zero temperature coefficient of resistance?
A Manganin
B Porcelain
C Carbon
D Copper
Which of the following resistive materials has the lowest temperature co-efficient of resistance ?
A Nichrome
B Constantan
C Kanthal
D Molybdenum
Which of the following high resistance materials has the highest operating temperature ?
A Kanthal
B Manganin
C Nichrome
D Eureka

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