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The superconducting materials will be independent of which of the following?
b) Electric field Explanation: Superconducting materials depends only on the applied magnetic field, resultant magnetization at the temperature considered. It is independent of the applied electric field and the corresponding polarization.
b) Electric field
Explanation: Superconducting materials depends only on the applied magnetic field, resultant magnetization at the temperature considered. It is independent of the applied electric field and the corresponding polarization.
See lessThe magnetic susceptibility in a superconductor will be
b) Negative Explanation: Due to perfect diamagnetism in a superconductor, its magnetic susceptibility will be negative. This phenomenon is called Meissner effect.
b) Negative
Explanation: Due to perfect diamagnetism in a superconductor, its magnetic
See lesssusceptibility will be negative. This phenomenon is called Meissner effect.
The magnetic field which destroys the superconductivity is called
d) Critical field Explanation: Critical field is that strong magnetic field which can destroy the superconductivity of a material. The temperature at which this occurs is called transition temperature.
d) Critical field
Explanation: Critical field is that strong magnetic field which can destroy the
See lesssuperconductivity of a material. The temperature at which this occurs is called transition temperature.
For a dielectric which of the following properties hold good?
b) They are superconductors at low temperatures Explanation: Superconductors are characterised by diamagnetism behaviour and zero resistivity, which true for a dielectric. They occur only at low temperature. Thus a dielectric can become a superconductor at low temperatures with very high dielectricRead more
b) They are superconductors at low temperatures
Explanation: Superconductors are characterised by diamagnetism behaviour and zero
See lessresistivity, which true for a dielectric. They occur only at low temperature. Thus a
dielectric can become a superconductor at low temperatures with very high dielectric
breakdown voltage.
A dielectric can be made a conductor by
b) Heating Explanation: On increasing the temperature, the free electrons in an insulator can be promoted from valence to conduction band. Gradually, it can act as a conductor through heating process. This condition is called dielectric breakdown, wherein the insulator loses its dielectric propertyRead more
b) Heating
Explanation: On increasing the temperature, the free electrons in an insulator can be promoted from valence to conduction band. Gradually, it can act as a conductor through heating process. This condition is called dielectric breakdown, wherein the insulator loses its dielectric property and starts to conduct.
See lessIdentify a good dielectric.
b) Ceramics Explanation: Iron and magnesium are metals. Hence they need not be considered. Both ceramics and plastic are insulators. But dielectric constant is more for ceramics always. Hence ceramics is the best dielectric.
b) Ceramics
Explanation: Iron and magnesium are metals. Hence they need not be considered. Both ceramics and plastic are insulators. But dielectric constant is more for ceramics always. Hence ceramics is the best dielectric.
See lessA dielectric is always an insulator. But an insulator is not necessarily a dielectric. State True/False.
a) True Explanation: For a material to be dielectric, its permittivity should be very high. This isseen in insulators. For a material to be insulator, the condition is to have large band gap energy. However, this is not necessary for a dielectric.
a) True
Explanation: For a material to be dielectric, its permittivity should be very high. This isseen in insulators. For a material to be insulator, the condition is to have large band gap energy. However, this is not necessary for a dielectric.
See lessA set of rods where numbers were carved and used for multiplication and division aids is known as
B. Napier’s Bones
B. Napier’s Bones
See lessThe least significant bit of the binary number, which is equivalent to any odd decimal number, is:
1
1
See lessWhich of the following is a programming language?
Pascal
Pascal
See less