What are the factors that affect the value of electrical resistance?
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- What will happen to the value of the impedance if the resistance will be increased or decreased? Explain...You want to demonstrate charging the electroscope by the induction process. However, it does not have a conductive wire to make "a ground connection". How can you demo without the cable? Explain.Express your idea of free currents and bound currents.Are they linked? (Book:grifith electrodynamics)
- 1. Passive voltage response to injected current step is not instantaneous, why not? Key words: time constant, resistance/capacitance propertiesWhen subjected to pressure, certain materials create a relatively small voltage. Materials that behave in this manner are called piezoelectrics. Investigate the applications in which piezoelectrics are used. Write a brief report discussing your findings.Problem A potentiometer is an instrument for measuring an unknown voltage in comparison to a standard voltage. In the potentiometer shown in Figure 1.0 a 16.0-m stretch of wire AB is connected to a 9.00-V battery. The resistance per unit length of the wire is 16.0 0/mm. The movable contact P is at point B. An ammeter (circle with A inside) is connected to point A. 16.0 m A B www Figure: 1.0 A V = 9.00 V
- What is Resistance and inductance.Explain the hysteresis that can be found in materials due to force, magnetic and electrical subjection (give an example on two different materials) high carbon stainless steel.An inductance of 2 henries and a resistance of20 ohms are connected in series with an emfof E volts. If the current is zero at time, t = 0,find the current at the end of 0.01 sec if E =100sin150t volts.
- A moving coil voltmeter with a resistance of 200 gives a full scale deflection of 120 degree, when a potential difference of 100mV is applied across it. The moving coil has dimension of 30mm*25mm and is wounded with 100 turns. The control spring constant is 0.375 *10-6N- m/ degree. Find the flux density, in the air gap. The specific resistance for copper=1.7* 10-80m . 0.13 0.22 0.15 0.12 0.2 wb/m2 wb/m2 wb/m2 wb/m2 wb/r flux densityPlease determine equivalent resistance and currentsQuestion A suspension type insulator has three units with self-capacitance C and ground capacitance 0.1C. What will be the string efficiency?