At what temperature is the Fahrenheit scale reading equal to twice that of the Celsius scale?

A. 460°C
B. 280°C
C. 360°C
D. 160°C

Related Mcqs:

The formula of inter-conversion of centigrade and Fahrenheit scale is___________?
A. c-32/9
B. f -32/9 =c/5
C. f-32/9=c/9
D. none

Submitted by: Mahrukh
The size of one degree of Celsius is equal to_________________?
A. One degree of Fahrenheit scale
B. 1.8 degrees of Fahrenheit scale
C. 3.2 degrees of Fahrenheit scale
D. 2.12 degrees of Fahrenheit scale
The Fahrenheit and centigrade scales agree to________________?
A. 40
B. 15.5
C. 542
D. 273
An alternating current is represented by the equation I = I∫sinπt which of the following equation represents an alternating current of frequency and amplitude twice that of the above current ?
A. I = 2I∫Sin(πt/2)
B. I = 2I∫Sin(2πt)
C. I = 2ISinπt
D. I = I∫sin(2πt)
In a photoelectric effect monochromatic light is incident on a metal surface. If the incident light of twice the intensity but of same wavelength the kinetic energy of the emitted electron_______________?
A. Becomes double
B. Remains same
C. Becomes half
D. First increases then decrease because of the curvilinear graph
If the momentum of an object is increased twice, then what will be the kinetic energy?
A. Twice
B. Thrice
C. Four times
D. Sixteen times

Submitted by: Imran Ali Mirbahar
The resultant of two forces of equal magnitudes is also equal to the magnitude of the forces. The angle between the two forces is________________?
A. 30°
B. 60°
C. 90°
D. 120°
A sensitive galvanometer gives full-scale deflection with 100 mV. If the resistance of the galvanometer is 50? the maximum current that can flow through safely is__________________?
A. 2.0 mA
B. 20 mA
C. 200 mA
D. 0.2 mA
A moving coil galvanometer of resistance 100? gives half scale deflection for a current of 20mA. What will be the potential difference across it ?
A. 4 volt
B. 5 volt
C. 2 volt
D. 0.4 volt
Mohus scale is used for to measure ____________?
A. Hardness
B. Humidity
C. Pressure
D. Temperature

Submitted by: Munir Ahmed

4 Comments

Saeed Ullah Jan on 01/05/2019 11:02 PM

Dear Team,

Kindly check the above question there is no option chosen but also the options are not satisfactory because during solution this Ans. is not coming from the given statement.
It will be the same as when 2F = C, and there may be two answers, one containing both positive values, and another containing both negative values. (C=F at -40)
C = 5/9 x (F-32)
Kindly Check and Rectify ASAP.

Thanks and Best Regards,

- admin on 02/05/2019 12:39 AM
  
  we have updated the question title. it was little confusing before. hope it will be clear now.
  
Saeed Ullah Jan on 02/05/2019 12:30 AM

Dear Team,

Now it is solved the ans is 160 Degree Celsius Correct option is D. Before i use wrong formula.
9x-10x=-160 whcih gives us 160 Ans.

- admin on 02/05/2019 12:38 AM
  
  At what temperature is the Fahrenheit scale reading equal to twice that of the Celsius?
  
  C = 5/9(F-32) or (F-32)/1.8
  
  We want C = 2F or F = C/2
  
  So C = (C/2 – 32)/1.8
  
  1.8 C = C/2 – 32
  
  1.3 C = -32
  
  C = -24.6, F = -12.3
  
  -24.6 degrees C = -12.3 degrees F. That’s rounded to the nearest tenth of a degree.
  
  At what temperature the Fahrenheit scale reading equal to half of Celsius scale:
  
  Basic conversion formula: F = 9/5C + 32
  Our problem: 2C = F
  
  Substitute F in the first formula with 2C from the second, which gives you:
  2C = 9/5C + 32
  
  Subtract 9/5C from both sides, which gives:
  2C – 9/5C = 32
  
  Simplify the left side (2C = 10/5C): 10/5C – 9/5C = 32, which equals 1/5C = 32
  
  Multiply 5 to each side, which leaves C = 160