The metal having the lowest temperature coefficient of resistance is
The metal having the lowest temperature coefficient of resistance is gold.
Last Answer : A metal resistor has resistance of 10 ohm at 0°C and 11 ohms at 160°C, the temperature coefficient is 0.000625 /°C.
Last Answer : For a particular material, the Hall coefficient was found to be zero. The material is metal.
Description : Concrete contains (i)Siliceous aggregates, having higher coefficient of expansion (ii)Igneous aggregates, having intermediate coefficient of expansion (iii)Lime stones, having lowest coefficient of expansion [ A ] i and iii [ B ] ii and iii [ C ] i and ii [ D ] i, ii and iii
Last Answer : [ D ] i, ii and iii
Description : A semiconductor device made out of a material having very high temperature coefficient of resistance is
Last Answer : A semiconductor device made out of a material having very high temperature coefficient of resistance is Thermistor
Last Answer : The resistivity of a metal is a function of temperature because the amplitude of vibration of the atoms varies with temperature.
Last Answer : Substances whose specific resistance abruptly decreases at very low temperature are called superconductors.
Description : ______ has zero temperature co-efficient of resistance.
Last Answer : Manganin has zero temperature co-efficient of resistance.
Last Answer : Superconducting metal in superconducting state has a relative permeability of zero.
Last Answer : The conductivity of a metal is determined by the electronic concentration and the mobility of the free electrons.
Description : By increasing impurity content in the metal alloy the residual resistivity always
Last Answer : By increasing impurity content in the metal alloy the residual resistivity always increases.
Description : Concrete containing (A) Siliceous aggregates, has higher co-efficient of expansion (B) Igneous aggregates, has intermediate coefficient of expansion (C) Lime stones, has lowest co-efficient of expansion (D) All the above
Last Answer : Answer: Option D
Description : The metal having lowest melting point?
Last Answer : Mercury
Last Answer : Surface resistance of an insulating material is reduced due to the smoky and dirty atmosphere, humidity in the atmosphere.
Last Answer : If the resistance of a conductor does not vary in accordance with Ohm's law it is known as non-linear conductor
Description : The temperature coefficient of copper is `0.004^(@)C^(-1)`. Find the resistance of a 5 m long copper wire of diameter 0.2 mm at `100^(@)C`, if the res
Last Answer : The temperature coefficient of copper is `0.004^(@)C^(-1)`. Find the resistance of a 5 m long copper wire of ... `0^(@)C` is `1.7xx10^(-8) Omega` m.
Description : The temperature coefficient of a resistance wire is `0.00 12.5^(@)C^(-1)`. At 300 K, its resistance is `1 Omega`. At what temperature the resistance o
Last Answer : The temperature coefficient of a resistance wire is `0.00 12.5^(@)C^(-1)`. At 300 K, its ... the resistance of the wire will be `2 Omega` ?
Description : The temperature coefficient of resistance of the material of a wire is `0.00125^(@)C^(-1)`. Its resistance at `27^(@)C` is `1 Omega`. At what temperat
Last Answer : The temperature coefficient of resistance of the material of a wire is `0.00125^(@)C^(-1)`. Its resistance at ... K B. 1100 K C. 1400 K D. 1127 K
Description : The temperature coefficient of resistance of an alloy used for making resistor is
Last Answer : The temperature coefficient of resistance of an alloy used for making resistor is A. small and ... C. large and positive D. large and negative
Description : The resistance of a bulb filmanet is `100Omega` at a temperature of `100^@C`. If its temperature coefficient of resistance be 0.005 per `.^@C`, its re
Last Answer : The resistance of a bulb filmanet is `100Omega` at a temperature of `100^@C`. If its temperature coefficient of ... . `200^(@)C` D. `400^(@)C`
Description : The existing resistance of a conductor is dependent upon its length, cross-sectional area, _____________. A. temperature and insulation B. material and insulation C. resistive coefficient and material D. material and temperature
Last Answer : Answer: D
Description : When temperature rises, resistance of negative temperature coefficient thermistor A. increases B. decreases C. zero D. infinity
Last Answer : decreases
Description : Which temperature coefficient indicates a material whose resistance increases as temperature increases?
Last Answer : Positive.
Description : Define the temperature coefficient of resistance.
Last Answer : The amount of increase in the resistance of a 1-ohm sample of the conductor per degree of temperature rise above 0º C
Description : The fractional change in resistance per kelvin is known as, a. temperature coefficient of resistance b. coefficient of Voltage of charge c. thermal expansion d. all of above
Last Answer : a. temperature coefficient of resistance
Description : Semi-conductors have ________ temperature coefficient of resistance. (A) Negative (B) Positive (C) Both positive and negative (D) None of the above
Last Answer : (A) Negative
Description : Problem on temperature coefficient of resistance 3
Last Answer : Problem on temperature coefficient of resistance 3
Description : Problem on temperature coefficient of resistance 2
Last Answer : Problem on temperature coefficient of resistance 2
Description : Problem on temperature coefficient of resistance 1
Last Answer : Problem on temperature coefficient of resistance 1
Description : Which amongst the following has a negative coefficient of temperature for resistance? a) Copper b) Lead c) Carbon d) Aluminium
Last Answer : Which amongst the following has a negative coefficient of temperature for resistance? Carbon
Last Answer : The resistance temperature coefficient is defined as the ratio of increase in resistance per degree centigrade to the resistance at 0oC.
Last Answer : A semiconductor has Negative temperature coefficient of resistance.
Description : what is the temperature coefficient of Resistance of conductor ?
Last Answer : conductors have positive coefficient. means as the temperature increases resistance also increases.
Description : what is the temperature coefficient of Resistance of semiconductor ?
Last Answer : semiconductors have negative temperature coefficient of resistance. means as the temperature increases resistance decreases.
Last Answer : The materials having low retentivity are suitable for making temporary magnets.
Last Answer : The conductivity of an extrinsic semiconductor with temperature remains constant.
Description : At transition temperature the value of the critical field is?
Last Answer : At transition temperature the value of critical field is zero.
Description : The transition temperature of mercury is?
Last Answer : The transition temperature of mercury is 4.12°K .
Description : The value of critical field below the transition temperature will?
Last Answer : The value of critical field below the transition temperature will increase.
Description : When a ring of metal is heated what happens to its hole? (1) expands (2) contracts (3) it expands or contracts according to its diameter (4) it expands or contracts according to its coefficient of expansion
Last Answer : (1) expands Explanation: The hole size will increase because in expansion the size between two molecules, do not increase so when the molecules on the outer edge move outward. Due to expansion, the ... expansion is the tendency of matter to change in volume in response to a change in temperature.
Description : A metal wire of 0.01 m dia and thermal conductivity 200 W/m.K is exposed to a fluid stream with a convective heat transfer coefficient of 100 W/m2 .K. The Biot number is (A) 5.6 (B) 0.025 (C) 3.5 (D) 0.0035
Last Answer : (B) 0.025
Description : When a ring of metal is heated what happens to its hole ? (1) expands (2) contracts (3) it expands or contracts according to its diameter (4) it expands or contracts according to its coefficient of expansion
Last Answer : expands
Description : What is the heat coefficient of resistance ?
Last Answer : Answer : The coefficient of heat is the amount of radh that increases with the increase in temperature per ohm of radh.
Description : A plantinum wire has resistance of `10 Omega` at `0^(@)C` and `20 Omega` at `273^(@)C`. Find the value of coefficient of resistance.
Last Answer : A plantinum wire has resistance of `10 Omega` at `0^(@)C` and `20 Omega` at `273^(@)C`. Find the value of coefficient of resistance.
Description : Determine the viscous damping coefficient if damper offers resistance 0.05N at constant velocity 0.04m/sec A 0.8N-sec/m B 1.5N-sec/m C 2.5N-sec/m D 1.25N-sec/m
Last Answer : D 1.25N-sec/m
Description : Coefficient of resistance is the ratio of (A) Actual velocity of jet at vena-contracta to the theoretical velocity (B) Area of jet at vena-contracta to the area of orifice (C) Loss ... available at the exit of the orifice (D) Actual discharge through an orifice to the theoretical discharge
Last Answer : Answer: Option C
Description : Coefficient of discharge Cd is equal to (where Cc = Coefficient of contraction, Cv = Coefficient of velocity, and Cr = Coefficient of resistance) (A) Cc × Cv (B) Cc × Cr (C) Cv × Cr (D) Cc /Cr
Last Answer : Answer: Option A
Description : In a braking test, a vehicle travelling at 36 km ph was stopped at a braking distance of 8.0 m. The average value of the vehicle's skid resistance (friction coefficient) is (A) 0.64 (B) 6.25 (C) 0.16 (D) None of these
Description : Manganese steels (A) Are non-magnetic (B) Possess high electrical resistance (C) Possess low coefficient of expansion (D) All the above
Description : Which of the following alkali metal ions has the lowest ionic mobility in aqueous solutions?
Last Answer : Which of the following alkali metal ions has the lowest ionic mobility in aqueous solutions? A. `Li^(+)` B. `Na^(+)` C. `Rb^(+)` D. `Cs^(+)`
Description : In which of the following complexes the metal ion has the lowest ionic radius ?
Last Answer : In which of the following complexes the metal ion has the lowest ionic radius ? A. `[Ti(H_(2)O)_(6)]^(2+)` B. `[V ... (2+)` D. `[Mn(H_(2)O)_(6)]^(2+)`