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For a semiconductor to be called as p-type semiconductor, which one of the following element impurities are added to a pure semiconductor ?
Which of the following components is used to create an N-type semiconductor? a. Trivalent impurity b. Pentavalent impurity c. Intrinsic semiconductor d. Extrinsic semiconductor
A water tank has two types of inlet pipe viz. Type A and type B. 5 inlet pipes of type A and 25 pipe of type B are opened, the tank is filled in 30 minutes. Whereas it takes 1 hour if 3 pipes of type A and 12 pipes of type B are opened. In how many minutes does empty tank is filled by 8 pipes of type A and 12 pipes of type B.
Consider the following statements regarding an N-P-N Bipolar Junction Transistor: 1. Emitter diode is forward biased and the collector diode is reverse biased 2. Emitter has many free electrons 3. Free electrons are injected into the base and pass through the collector 4. Depletion layers around junction J1 and J2 of BJT are widened. Which of the above statements are correct?
Consider the following statements in connection with deflection-type and null-type instruments: 1. Null-type instruments are more accurate than the deflection-type ones. 2. Null-type of instrument can be highly sensitive compared to a deflection-type instrument. 3. Under dynamic conditions, null-type instruments are less preferred to deflection-type instruments. 4. Response is faster in null-type instruments as compared to deflection-type instruments. Which of the above statements are correct?
Choose the correct statements regarding dielectric. (i) Dielectrics have free electrons (ii) Dielectric does not have free electrons (iii) Dielectrics are conductor
If the number of electrons (majority carrier) in a semiconductor is 5 X 1020 m-3 and μe is 0.135 mho, find the resistivity of the semiconductor.
নিম্নের কোনটি p-টাইপ অর্ধপরিবাহীতে n-টাইপ অর্ধপরিবাহীর তুলনায় বেশি আছে? (Which of the following does a p-type semiconductor have more compared to an n-type semiconductor-)  
Which of the following statements is/are correct? 1) Conductor contains a large number of electrons in the conduction band at room temperature. No energy gaps exist and the valence and conduction bands overlap. 2) A semiconductor is a material in which the energy gap is so large that practically no electron can be given enough energy to jump this gap. 3) An insulator is a solid with an energy gap small enough for electrons to cross rather easily from the valence band to conduction band.
In a semiconductor it is observed that three-quarters of the current is carried by electrons and one quarters by holes. If the drift speed is three times that of the holes, what is the ratio of electrons to holes?