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When a body is heated, then maximum rise will be in its
When a body is heated up, it has an expansion of its particles. The body expands because the particles have all gained energy and are moving away. Expansion occurs in all dimensions, which includes increases in length, surface area, and volume. The rise in volume leads to a maximum change since it dRead more
When a body is heated up, it has an expansion of its particles. The body expands because the particles have all gained energy and are moving away. Expansion occurs in all dimensions, which includes increases in length, surface area, and volume. The rise in volume leads to a maximum change since it depends on the expansion in three dimensions: length, width, and height. The surface area increases in two dimensions. Length only expands in one dimension. Overall, expansion in volume is larger; thus, it is a correct choice to be compared with the effects of heating.
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The resistance of tungsten filament at 150°C is 133 Ω. What will be its resistance at 500°C? The temperature coefficient of resistance of tungsten is 0.0045 per °C.
To calculate the resistance of tungsten at 500°C, we make use of the formula for temperature-sensitive resistance: Rₜ = R₀ × [1 + α × (Tₜ - T₀)] Here, - R₀ = 133 Ω (resistance at T₀ = 150°C), - α = 0.0045 per °C (temperature coefficient), - Tₜ = 500°C. Now, substituting the values, Rₜ = 133 × [1 + 0Read more
To calculate the resistance of tungsten at 500°C, we make use of the formula for temperature-sensitive resistance:
Rₜ = R₀ × [1 + α × (Tₜ – T₀)]
Here,
– R₀ = 133 Ω (resistance at T₀ = 150°C),
– α = 0.0045 per °C (temperature coefficient),
– Tₜ = 500°C.
Now, substituting the values,
Rₜ = 133 × [1 + 0.0045 × (500 – 150)]
Rₜ = 133 × [1 + 0.0045 × 350]
Rₜ = 133 × [1 + 1.575]
Rₜ = 133 × 2.575 = 342.48 Ω.
The resistance is about 366 Ω.
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At which temperature, the centrigrade and Feherenheit scales are
The Celsius (centigrade) and Fahrenheit scales are equal at -40°. This can be derived using the conversion formula: F = (9/5)C + 32 Substitute F = C: C = (9/5)C + 32 Multiply through by 5 to eliminate the fraction: 5C = 9C + 160 Rearrange terms: -4C = 160 Solve for C: C = -40 Thus, the Celsius and FRead more
The Celsius (centigrade) and Fahrenheit scales are equal at -40°.
This can be derived using the conversion formula:
F = (9/5)C + 32
Substitute F = C:
C = (9/5)C + 32
Multiply through by 5 to eliminate the fraction:
5C = 9C + 160
Rearrange terms:
-4C = 160
Solve for C:
C = -40
Thus, the Celsius and Fahrenheit scales are equal at -40°.
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The first law of thermodynamics is a statement of
The first law of thermodynamics states that the energy of a closed system is conserved, i.e., the change in internal energy is equal to the heat added to the system minus the work done by the system. This question related to Chapter 11 physics Class 11th NCERT. From the Chapter 11. Thermodynamics. GRead more
The first law of thermodynamics states that the energy of a closed system is conserved, i.e., the change in internal energy is equal to the heat added to the system minus the work done by the system. This question related to Chapter 11 physics Class 11th NCERT. From the Chapter 11. Thermodynamics. Give answer according to your understanding.
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What does the area under a PV curve represent?
The area under a PV curve represents the work done during the process. This question related to Chapter 11 physics Class 11th NCERT. From the Chapter 11. Thermodynamics. Give answer according to your understanding. For more please visit here: https://www.tiwariacademy.com/ncert-solutions/class-11/phRead more
The area under a PV curve represents the work done during the process. This question related to Chapter 11 physics Class 11th NCERT. From the Chapter 11. Thermodynamics. Give answer according to your understanding.
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