61. A material is said to have become superconductor when
62. How much (approximate) is the frequency independent power factor of a plastic dielectric capacitor?
63. Which of the following materials is not an insulator?
64. It is possible to destroy the superconductivity of a material by applying
65. Which of the following are the properties of ferromagnetic domains?
1. Permanent magnetization
2. Atomic moments in individual domains are all aligned neither parallel to nor perpendicular to one another below Curie point temperature
3. Each domain is magnetically saturated
4. Above Curie temperature, domains disrupt
Select the correct answer using the options given below:
1. Permanent magnetization
2. Atomic moments in individual domains are all aligned neither parallel to nor perpendicular to one another below Curie point temperature
3. Each domain is magnetically saturated
4. Above Curie temperature, domains disrupt
Select the correct answer using the options given below:
66. Metal film resistors are made by depositing a very thin layer of metal on a
67. Intrinsic semiconductor are those which
68. A perfect conductor has
69. Which of the following point are important on the viscosity scale in the fabrication and processing of glasses?
1. Softening point
2. Working point
3. Melting point
1. Softening point
2. Working point
3. Melting point
70. Which of these ceramic materials have relative permittivity εr between 3 to 6 and loss angle tan δ between 50 × 10-4 to 100 × 10-4?
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