Transformation of non-electrical quantities. Calibration of semiconductor, thermometer and photoelement - Medical Physics - MCQs

If a semiconductor is brought down to temperature of absolute zero (0 Kelvin), it will become:

According to Band Theory of Solids, what can be said about the relationship between band-gap width and the tendency of material to conduct electricity?

According to Band Theory of Solids, what can be said about P- and N- type conductivity with regard to the location of the electron bands?

What are the respective current carriers for N- and P-type conductivity?

Typical semiconductors such as Silicon and Germanium are group IV elements. Choose the correct statement regarding the doping and the type of conductivity (N or P) acquired, after doping:

What is the relationship between N- and P- type charge carriers for intrinsic (undoped) semiconductors?

For semiconducting materials, charge carrier species called holes are best described as:

In doped (extrinsic) semiconductors, the predominant current carriers are called majority charge carriers, and secondary carriers are called minority. Which statement is true for N-and P-type semiconductors:

Transistors are made of N- and P-type semiconductors arranged in a such way that:

The two main functions of the transistor are:

Choose the FALSE statement. Electrical amplifiers are used for:

The magnitude of electrical impedance of biological tissues is the (Pythagorean) sum of:

What type of transducer is the piezoelectric crystal in ultrasonic equipment, when working in receiving mode?

The “band gap” in semiconductor theory is defined as:

When temperature increases, the band gap in a semiconductor:

When semiconductor is doped with element of lower valence (P-type doping) it becomes a donor (gives off electrons) and there is a shift in the energy band gap. The new electron levels are:

When temperature increases, the conductivity of semiconductors:

When semiconductor is doped with element of higher valence (N-type doping) it becomes an acceptor (takes electrons) and there is a shift in the energy band gap. The new electron levels are:

When Silicon (Si) is doped with one of the following elements, it acquires P-type conductivity (holes are the majority carriers). Choose the one:

Electric circuit components composed of single p-n junction are called:

What is the mathematical relation between the electrical resistance (R) in a semiconductor and the temperature (T)?

What is the mathematical relationship between the generated voltage in a photodiode and the distance from the light source?

Which of the following statements is true about the element Germanium?

The most common material in modern integrated circuits is: