Physics
General
Easy
Question
If a copper wire is stretched to make it n=0.1% longer, then what is the percentage change in its resistance?
- 0.2%
- 0.3%
- 0.4%
- 0.1%
The correct answer is: 0.2%
Related Questions to study
chemistry-
The standard molar heat of formation of ethane, CO2,andwater(
) are respectively–21.1,–94.1and –68.3Kcal.Thestandardmolarheatofcombustion of ethane will be-
The standard molar heat of formation of ethane, CO2,andwater() are respectively–21.1,–94.1and –68.3Kcal.Thestandardmolarheatofcombustion of ethane will be-
chemistry-General
chemistry-
Given that standard heat enthalph of CH4,C2H4 andC3H8are–17.9,12.5,–24.8Kcal/mol. The ΔH for CH4+C2H4→C3H8 is-
Given that standard heat enthalph of CH4,C2H4 andC3H8are–17.9,12.5,–24.8Kcal/mol. The ΔH for CH4+C2H4→C3H8 is-
chemistry-General
chemistry-
The enthalpy of formation of ammonia is–46.0KJ mol–1.The enthalpy change for the reaction 2NH3(g)→N2(g)+3H2(g) is-
The enthalpy of formation of ammonia is–46.0KJ mol–1.The enthalpy change for the reaction 2NH3(g)→N2(g)+3H2(g) is-
chemistry-General
chemistry-
Since the enthalpy of the elements in their standard states is taken to be zero. The heat of formation (ΔHf) of compounds–
Since the enthalpy of the elements in their standard states is taken to be zero. The heat of formation (ΔHf) of compounds–
chemistry-General
chemistry-
Theenthalpyofareactionat273Kis–3.57KJ. whatwillbetheenthalpyofreactionat373Kif ΔCp=zero-
Theenthalpyofareactionat273Kis–3.57KJ. whatwillbetheenthalpyofreactionat373Kif ΔCp=zero-
chemistry-General
chemistry-
For the reaction; H(g)+½O (g)=H O(), ΔC =7.63cal/deg;Δ=68.3Kcal, what will be the value (in Kcal) of ΔH at 100°C-
For the reaction; H(g)+½O (g)=H O(), ΔC =7.63cal/deg;Δ=68.3Kcal, what will be the value (in Kcal) of ΔH at 100°C-
chemistry-General
chemistry-
From the reaction P(White) →P(Red); ΔH=–18.4KJ,iffollowsthat-
From the reaction P(White) →P(Red); ΔH=–18.4KJ,iffollowsthat-
chemistry-General
physics
The current taken from the 30V supply and the current through the 6Ω resistor are respectively.
The current taken from the 30V supply and the current through the 6Ω resistor are respectively.
physicsGeneral
physics
temperature coefficient of resistance of wire is 1.25
At 300 k , its resistance is What is the temperature at which its resistance becomes 2Ω ?
temperature coefficient of resistance of wire is 1.25 At 300 k , its resistance is What is the temperature at which its resistance becomes 2Ω ?
physicsGeneral
physics
A wire has resistance 
, What will its resistance if it is stretched to double, What is its length ?
A wire has resistance , What will its resistance if it is stretched to double, What is its length ?
physicsGeneral
physics
What is its resistance across AB?
What is its resistance across AB?
physicsGeneral
chemistry-
Considerthereaction3O2 →2O3;ΔH=+Ve, from the reaction, we can say that -
Considerthereaction3O2 →2O3;ΔH=+Ve, from the reaction, we can say that -
chemistry-General
chemistry-
Theheatchangeduringthereaction24gCand128gSfollowingthechangeC+S2→CS2;ΔH=22Kcal
Theheatchangeduringthereaction24gCand128gSfollowingthechangeC+S2→CS2;ΔH=22Kcal
chemistry-General
chemistry-
According to the following reaction C(S)+1/2O2(g)→CO(g),ΔH=–26.4Kcal
According to the following reaction C(S)+1/2O2(g)→CO(g),ΔH=–26.4Kcal
chemistry-General
chemistry-
S(rhombic)+O2(g)→SO2(g);ΔH=–297.5KJ S(monoclinic)+O2(g)→SO2;ΔH=–300KJ The data can predict that -
S(rhombic)+O2(g)→SO2(g);ΔH=–297.5KJ S(monoclinic)+O2(g)→SO2;ΔH=–300KJ The data can predict that -
chemistry-General
