Ohm's Law Lab 4

Question 3 a. Some materials exhibit the property of superconductivity under certain conditions. State what is meant by superconductivity and explain the required conditions for the material to become superconducting. b. The diagram below shows the cross-section of a cable consisting of parallel filaments that can be made superconducting, embedded in a cylinder of copper. copper cylinder filament The cross-sectional area of the copper in the cable is 2.28 x 10-7 m². The resistance of the copper in a 1.0 m length of the cable is 0.075 N. Calculate the resistivity of the copper, stating an appropriate unit. State and explain the what happen to the resistance of the cable when the embedded filaments of wire are made superconductive? i.

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?

Please type out and or diagram Your solution I have bad eyesight and have a hard time reading handwriting

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

What is a voltaic cell? Please explain in detail.

Diagram of the problem, necessary formulas, clearance and numerical solution. A steady current of 0.5 A flows through a wire. How much charge passes through the wire in one minute?

b) Describe the traces you would see on an oscilloscope monitoring voltage changes across a resistance which has: - AC flowing through it - DC flowing through it You should include diagrams to support your descriptions for each trace.

QUESTION 7 Match Collumn A and Collumn B? Properties of Metal v Britleness A. the property of a metal which allows little bending or deformation without shattering Conductivity B. the property of metal to resist deformation and stress without breaking the property of a metal which can be hammered, rolled. or pressed into various shape without C. v Hardness cracking, breaking or leaving some other detrimental effect v Strength D. the property of a metal to resist cutting, penetration and abbrasion v Elasticity E. the weight of a unit volume of a material F. the property of a metal to become liquid by the application of heat v Malleability the property of metal which enables a material to return to its original state when the force G. applied is removed v Fusibility v Density H. the property of a metal to conduct electricity or heat Click Save and Submit to save and submit. Click Save All Answers to save all answers. Beno

3. Fast help needed to answer this Engineeing question. Check image.   Postive feedback for right answer :)

The resistance of wire increases from 40 – ohm at 20 0C to 50 – ohm at 70 0C. Find the temperature coefficient of resistance at 0 0C.

Describe in a creative way the effect of temperature increases on the resistance of a metallic conductor. Also, describe the ability of the material to conduct current in terms of its resistivity and conductivity.Note: You may express your answer through a drawing, just by making a slogan or a poster, It is all up to you as long as you can describe.

45. Equivalent electrical parameter of MMF in electric circuits. a.   Voltage b.   Resistance c.   Current d.   Conductance