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ESE EC : Material Science Champion Quiz 1
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Question 1
Consider the given statement
Statement I: A superconductor is a perfect diamagnetic material.
Statement II: A superconductor is a perfect conductor.
Statement I: A superconductor is a perfect diamagnetic material.
Statement II: A superconductor is a perfect conductor.
Question 2
Manganin, an alloy of copper and manganese, is used in
Question 3
A thin resistive film having length (l), width (w) and thickness (t) is used as a resistor (R1) for conducting current in the direction of l. If the film is connected to serve as a resistor (R2) for conducting current in the direction of w, then what is the value of R1/R2?
Question 4
The transition temperature of super-conducting material is changed by which of the following?
Question 5
Metal film resistors are made by depositing a very thin layer of metal on a
Question 6
Which one of the following correctly represents the variation of critical magnetic field (HC) with temperature for a superconductor?
Question 7
Match List-I (Material/Characteristics) with List-II (Superconductor kind) and select the correct answer using the codes given below the lists:
List-I
A. Incomplete Meissner’s effect, high critical field and transition temperature. Absence of Silsbee’s rule
B. Meissner’s effect and Silsbee’s rule
C. Amorphous thin films of Bi and Fe
List-II
1) Hard superconductor
2) Soft superconductor
3) Superconductor
List-I
A. Incomplete Meissner’s effect, high critical field and transition temperature. Absence of Silsbee’s rule
B. Meissner’s effect and Silsbee’s rule
C. Amorphous thin films of Bi and Fe
List-II
1) Hard superconductor
2) Soft superconductor
3) Superconductor
Question 8
Which one of the following correctly depicts the V-I characteristics of a typical thermistor?
Question 9
Which of the following statements is/are true for a good conductor of electricity?
1) Its conductivity decreases with increasing temperature.
2) Number of free electrons is around 1028 m-3
3) Its conductivity decreases with addition of impuritities.
4) It is a good conductor of heat also.
Select the correct answer using the codes given below:
1) Its conductivity decreases with increasing temperature.
2) Number of free electrons is around 1028 m-3
3) Its conductivity decreases with addition of impuritities.
4) It is a good conductor of heat also.
Select the correct answer using the codes given below:
Question 10
Consider the following statements:
The conductivity of a metal has negative temperature coefficient since:
1) The electron concentration increases with temperature.
2) The electron mobility decreases with temperature.
3) The electron-lattice scattering rate increases with temperature.
Which of the above statements is/are correct?
The conductivity of a metal has negative temperature coefficient since:
1) The electron concentration increases with temperature.
2) The electron mobility decreases with temperature.
3) The electron-lattice scattering rate increases with temperature.
Which of the above statements is/are correct?
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Sep 15ESE & GATE EC
