In an experiment a solid ceramic insulator is subjected to a voltage of 30 kV (AC-peak) at 50 Hz. The ammeter connected to the insulator in series shows a current of 17.3 mA (AC-peak). If the dissipation factor of the insulator is 0.0005, find the dielectric loss of this insulator in this test if ionization and polarization losses are fully ignored. Assume that the insulator is modelled as a series combination of a resistance and a capacitor. Citfen birini seçin: a.2.7312 W b.0.3751 W c.1.6330 W d.0.1743 W e.0.2595 W

This is an electrical engineering question. It belongs to microelectronics and material processes.

A-How temperature affects the conductivity of conductive metals and how it affects semiconductors.semiconductors B-What is superconductivity, how does it relate to temperature? Some examples of superconductors.superconductors.

question in photo plz

Silicon is doped with a boron concentration of 4×1018/cm3. Is boron a donor or acceptor impurity? Find the electron and hole concentrations at 300 K. Is this material n-type or p-type? Find the electron and hole mobilities. What is the resistivity of the material?

A. Why does the conductivity of a semiconductor and some insulators change with impurity content? Compare this with the behaviour of metallic conductors. B. Discuss the location of the Fermi levels of intrinsic and extrinsic (n-type and p-type) semiconductors in low temperature and high temperature ranges. C. Discuss why the structure of the p-n junction is so important to modern technologies that impact our daily life.

(b) Measure (using the DVM and oscilloscope) the voltage drop Vc across the capacitor and explain the operation of the circuit.   the voltage drop Vc across the capacitor is 4.61V please explain question b

(c) A 50 Hz sinusoidal AC voltage source of peak value V, = 340 V delivers power to a resistive load of 50 n. (1) Calculate the average power delivered. (i) The AC source is now connected to the load via a full wave diode bridge. The turn-on voltage of the diodes is 0.3 V. Calculate the peak voltage across the load and the average voltage across the load. (ii) Explain how a smoothing capacitor can be used to hold up the voltage across the load. Compare the efficiency of the rectifier with and without the smoothing capacitor. (iv) Define "regulation" as applied to the output voltage of a rectifier and explain why an LR filtered rectifier bridge provides better regulation of the load voltage than an RC filtered rectifier bridge.

For the circuit shown in the Figure, if the diodes are silicon diodes with Vp(on)=0.7 V, and VIN=50 sin wt V, V1 =6 V and V2 = 16 V, then the value of VouTP-p) is: R, D VaN Vout v1事 2章 Oa. 25.4 V Ob. 27.4 V Oc. 29.4 V Od. 23.4 V

Draw band diagrams for below contacts.   b) metal-n-type semiconductor for Φm> Φs