In a pure sample of silicon - Materials and Components

Electronics and Communication Engineering (ECE) : Materials and Components - Quiz(MCQ)

In a pure sample of silicon

the number of free electrons is less than number of holes

the number of free electrons is more than the number of holes

the number of holes and free electrons is always equal

the number of free electrons and holes is equal at low temperature

Correct Answer : Option (C) : the number of holes and free electrons is always equal

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Magnetic hysteresis phenomenon is explained by

domain rotation

motion of domain walls

motion of domain walls and domain rotation

None of the above

Correct Answer : motion of domain walls and domain rotation

A circular sphere mile is the area of cross-section of a wire

having a radius equal to 1 miles

having a circumference equal to 1 miles

having a circumference equal to 0 miles

having a diameter equal to 1 miles

Correct Answer : having a diameter equal to 1 miles

For small size high frequency coils, the most common core material is

steel

ferrite

air

powdered iron

Correct Answer : air