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
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When hot liquid is poured into a thick glass tumbler, it cracks because glass – (1) is a bad conductor of heat so only inner surface expands (2) has high temperature coefficient of expansion (3) has a very low specific heat (4) has low temperature coefficient of expansion
Last Answer : (1) is a bad conductor of heat so only inner surface expands Explanation: When hot liquid is poured into a thick glass tumbler, it cracks because glass is a bad conductor of heat so only inner surface expands.
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When hot liquid is poured into a thick glass tumbler, it cracks because glass : (1) is a bad conductor of heat so only inner surface expands (2) has high temperature coefficient of expansion (3) has a very low specific heat (4) has low temperature coefficient of expansion
Last Answer : is a bad conductor of heat so only inner surface expands
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Jan 21, 2021
by
anonymous
Problem on temperature coefficient of resistance 3
Last Answer : Problem on temperature coefficient of resistance 3
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84 views
1 answer
asked
May 20, 2019
by
anonymous
Problem on temperature coefficient of resistance 2
Last Answer : Problem on temperature coefficient of resistance 2
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80 views
1 answer
asked
May 20, 2019
by
anonymous
Problem on temperature coefficient of resistance 1
Last Answer : Problem on temperature coefficient of resistance 1
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83 views
1 answer
asked
May 19, 2019
by
anonymous
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
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161 views
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asked
Apr 23, 2018
by
anonymous
Last Answer : The resistance temperature coefficient is defined as the ratio of increase in resistance per degree centigrade to the resistance at 0oC.
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106 views
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Mar 31, 2018
by
anonymous
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.
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207 views
1 answer
asked
Mar 31, 2018
by
anonymous
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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.
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144 views
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asked
Aug 14, 2017
by
anonymous
Last Answer : Whenever a wave is incident on a perfect conductor then the reflection coefficient is 0.
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234 views
1 answer
asked
Mar 29, 2018
by
anonymous
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.
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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` ?
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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
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1 answer
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
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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`
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When temperature rises, resistance of negative temperature coefficient thermistor A. increases B. decreases C. zero D. infinity
Last Answer : decreases
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Which temperature coefficient indicates a material whose resistance increases as temperature increases?
Last Answer : Positive.
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asked
Aug 19, 2021
by
anonymous
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
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asked
Aug 18, 2021
by
anonymous
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
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136 views
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asked
Aug 4, 2021
by
anonymous
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
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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
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141 views
1 answer
asked
Apr 10, 2018
by
anonymous
Last Answer : A semiconductor has Negative temperature coefficient of resistance.
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340 views
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asked
Mar 29, 2018
by
anonymous
The metal having the lowest temperature coefficient of resistance is
Last Answer : The metal having the lowest temperature coefficient of resistance is gold.
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407 views
1 answer
asked
Mar 28, 2018
by
anonymous
How does the resistance of a conductor compare to that of an insulator?
Last Answer : The resistance of a conductor can be significantly lower than the resistance of an insulator, depending on each material's atomic properties.
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2.7k views
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asked
Jun 29, 2019
by
anonymous
Write the four factors affecting the resistance of a conductor.
Last Answer : Factors affecting the resistance of a conductor: - 1.Physical state of a conductor 2.Length of a conductor 3.Area of cross section of a conductor 4.Resistivity of a conductor
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537 views
1 answer
asked
Sep 4, 2018
by
anonymous
The effective resistance of a conductor will be the same as ohmic resistance when : - a) current is in true sine wave form b) voltage is low c) power factor is unity d) current is uniformly distributed in the conductor cross-section
Last Answer : The effective resistance of a conductor will be the same as ohmic resistance when : - current is uniformly distributed in the conductor cross-section
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514 views
1 answer
asked
Apr 11, 2018
by
anonymous
With the increase in the cross sectional area of the conductor, the value of resistance: (1) Increase (2) Remain same (3) Decrease (4) None of these
Last Answer : With the increase in the cross sectional area of the conductor, the value of resistance: Decrease.
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79 views
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asked
Apr 9, 2018
by
anonymous
resistance of conductor depends on?
Last Answer : Use of material Temperature of surrounding Length of conductor Area of cross section of conductor
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94 views
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asked
Aug 14, 2017
by
anonymous
What will happen to the resistance if the electric conductor temperature and cross section remain unchanged ?
Last Answer : If the conductive temperature and the cross section remain unchanged, increasing the length will increase the resistance.
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asked
Jan 28
by
anonymous
Why does the resistance of the conductor increase when the temperature increases ?
Last Answer : Because the vibrations of the atoms inside the conductor increase.
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Jan 27
by
anonymous
A platinum resistance thermometer makes use of the variation of a conductor with temperature. If the resistance of this thermometer is `5 Omega " at "
Last Answer : A platinum resistance thermometer makes use of the variation of a conductor with temperature. If the resistance ... for the platinum `=0.0036^(@)C`.
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The resistance of a conductor is inversely proportional to its - (1) temperature (2) resistivity (3) area of cross section (4) length
Last Answer : (3) area of cross section Explanation: The resistance of a current carrying conductor is inversely proportional to the area of cross section of the conductor. This is because the resistance occurs due to the collision of electrons/charged particles.
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Indicate the three types oftransmissionline energylosses. a. I2R, R , and temperature b. Radiation, I2R, and dielectric heating c. Dielectric separation, insulation breakdown, and radiation d. Conductor heating, dielectric heating, and radiation resistance.
Last Answer : b. Radiation, I2R, and dielectric heating
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asked
Aug 15, 2021
by
anonymous
Compare RTD and thermistor on the basis of temperature coefficient , linearity, temperature range and cost.
Last Answer : Parameters RTD Thermistors Temperature coefficient It has positive temperature Coefficient (PTC) of Resistance. It has both positive and negative temperature Coefficient (PTC and NTC) of Resistance. ... -270oC to 2800oC -150oC to 300oC Cost High cost Low cost
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110 views
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asked
Sep 9, 2018
by
anonymous
Which of the following has nearly zero temperature coefficient? A) Constantan B) Manganin C) Both A and B D) None of these
Last Answer : Which of the following has nearly zero temperature coefficient? A) Constantan B) Manganin C) Both A and B D) None of these
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asked
Apr 29, 2018
by
anonymous
Which of the following has negative temperature coefficient? A. Brass B. Mercury C. Electrolytes D. Silver.
Last Answer : Electrolytes has negative temperature coefficient.
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250 views
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asked
Apr 12, 2018
by
anonymous
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.
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asked
Jan 28
by
anonymous
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.
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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
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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
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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
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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
Last Answer : Answer: Option C
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Manganese steels (A) Are non-magnetic (B) Possess high electrical resistance (C) Possess low coefficient of expansion (D) All the above
Last Answer : Answer: Option D
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1 answer
What are the advantages of high resistance of conductor ?
Last Answer : : The resistance and melting point of nichrome is much higher than that of copper. Due to the high resistance, a lot of heat is generated when electricity flows through the nichrome wire. ... high resistance and melting point of tungsten, it can easily convert electrical energy into light energy.
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1 answer
asked
Jan 28
by
anonymous
How does the resistance of the conductor depend on the length and cross section of the conductor ?
Last Answer : Conductor resistance is proportional to the length of the conductor and disproportionate to the cross section .
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1 answer
asked
Jan 28
by
anonymous
What is the unit of resistance of electric conductor ?
Last Answer : The unit ohm of resistance of an electric conductor.
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1 answer
asked
Jan 27
by
anonymous
What is the resistance of the conductor ?
Last Answer : : Conduction resistance depends on the area and length of the cross section of the conductive material.
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asked
Jan 27
by
anonymous
What is the unit of electrical resistance of a conductor?
Last Answer : Answer: Ohm
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1 answer
asked
Jan 20
by
anonymous
A potential difference of 10 V is applied across a conductor of resistance `1 k Omega`. Find the number of electrons flowing through the conductor in
Last Answer : A potential difference of 10 V is applied across a conductor of resistance `1 k Omega`. ... of electrons flowing through the conductor in 5 minutes.
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