n type semiconductors - Materials and Components

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

n type semiconductors

are negatively charged

are produced phosphorus as impurity is added to silicon

are produced when indium as impurity is added to germanium

None of the above

Correct Answer : Option (B) : are produced phosphorus as impurity is added to silicon

Explanation : n type semiconductors are produced by adding pentavalent material like phosphorus to silicon.

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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