Question 15 Copper is a good electrical conductor, when copper is alloyed with nickel, it becomes an insulator the electrical resistivity decreases the electrical conductivity decreases the electrical conductivity increases
Question 15 Copper is a good electrical conductor, when copper is alloyed with nickel, it becomes an insulator the electrical resistivity decreases the electrical conductivity decreases the electrical conductivity increases
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Transcribed Image Text:Question 15
Copper is a good electrical conductor, when copper is alloyed with nickel,
it becomes an insulator
the electrical resistivity decreases
the electrical conductivity decreases
the electrical conductivity increases
Transcribed Image Text:Question 14
Which of the following is not the characteristics of diamagnetic materials?
In the presence of an external magnetic field, the atomic dipoles are induced and aligned in the opposite direction to that of the applied field.
Diamagnetism is a very weak form of magnetism that is non-permanent and persists only while an external field is being applied.
In the presence of an external magnetic field, the atomic dipoles align preferentially, by rotation, in the direction of the applied field.
In the absence of an external magnetic field, no atomic dipoles exists.
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