LAB REPORT 3-phy2049L

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investigates and explains in detail the concept of induced current and induced voltage

Considering that the power loss of a resistor is  and the information in the manual’s background section, derive an expression for the energy lost through Joule heating in a resistor when a capacitor completely discharges

lell L1 R Ro 2. In this figure, assume arbitrary numbers for R1, R2, L1, and L2 including some number for the battery E. Find the rate of current in which inductor one (L1) is changing just after the switch is closed. Next, find the current in L1 after some time after the switch has been closed. lell

Cyclic Voltammetry and Charge-discharge The given figure is the Galvanostatic Charge-discharge curves of a supercapacitor made with MnO2 coated on a CNT electrode.  Potential is measured with respect to time by applying different current densities. Based on the plot, answer the following questions   4. Is it possible to estimate maximum power of the device with this charge-discharge curve? If possible, explain how you would do it. (calculation is not necessary)

Discussions:Voltage Distribution and String Efficiency of a Model Suspension Insulator       1- Comment on the results obtained.2- Give reasons for unequal potential distribution over the string.3- What is the effect of this un equality on the insulators?4- Can value of the string efficiency being equal to 100%. Explain your answer.5- Outline methods used to equalize the potential across the units.6- Why an insulator is represented as a capacitor C? What are the assumptionmodes?

Mid-term exam Principles of Electricity (cont'd) 11. According to Ohm's Law, electron flow is proportional to electrical pressure. a. Inversely b. Indirectly c. Directly d. Not 12. What equation represents the characteristics of electron flow in a parallel circuit? a. E=IxR b. ET=E1=E2=E3... c. IT=l1+l2+l3... d. ET=E1+E2+E3... 13. What equation represents the characteristics of electrical pressure in a parallel circuit? a. E=IxR b. ET=E1=E2=E3... c. IT=l1+l2+l3... d. ET=E1+E2+E3.. 14. How much electrical pressure would be required to produce 25A current in a circuit with 19.20 total resistance? a. 480A b. 480V C. 1.3V d. 0.768V 15. As resistors are removed from a series circuit, what will happen to the current? a. The current will increase b. The current will decrease c. The current will stay the same d. There is not enough information given

Shown below is a DC circuit that contains a number of switches. Each switch is resistanceless when closed. All of the connecting wires may be considered to have zero resistance. All of the resistors shown are identical. The circuit contains an ideal voltmeter. The diagram shows all of the switches open. Beside the diagram are eight different switch configurations for the circuit. Rank these configurations in terms of the voltmeter reading. That is, put first the configuration for which the voltmeter gives the largest reading, and put last the configuration for which the yoltmeter gives the smallest reading. If two or more configurations produce the same voltmeter reading, give these configurations equal ranking. S2 S3 Configuration Wr A Орen Open Орел B Орen Ореn Closed W- Орen Closed Орen r42 Closed Орen Closed S2 Closed Open Орen F Closed Орen Clošed S3 G Closed Closed Open 1.64 Closed Closed Closed 3. 5. 6 7_ 8_ Smallest Lárgest 1 2 Or, all configurations produce the same voltméter…

A PMMC type meter has a full scale deflection of 10 mA. The resistance of the coil is 30 ohm. Then (1) shunt value for an Ameter of 50 A range and (2) Find the value of series resistance required for the range up to 500 V.