Physics 2 Lab 2 Mapping Electrostatic Potential

The 'skin effecť is a phenomenon experienced when current flows through a metal. Which two of the following statements are correct? 15 Select one or more: O a. A smaller 'skin depth' implies a higher resistance O b. Direct current can cause the skin effect O c. The skin depth is smaller in highly conductive metals O d. The skin depth is larger in metals with high magnetic permeability

Describe and briefly explain the functions of the following Electrical Components.  Insulator Conductor Raceway DC Circuit AC Circuit

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?

One of the methods of charging materials wherein the transfer of charges is due to the contact between two materials and depends also on the nature of the materials.     Select one: a. charging by conduction b. charging by friction c. charging by induction d. charging by grounding

Figure Q1(a) shows a piece of ferromagnetic core with magnetic flux (B) with circular current (I) around the core. Figure Q1(b) show laminated ferromagnetic core with the same magnetic flux (B) and circular currents. With the aid of diagrams, explain how the current as highlighted in red (I) is developed in the ferromagnetic core in Figure Q1(a). B (a) (b) Figure 1(a) A ferromagnetic core and (b) laminated ferromagnetic core

Electrical circuits questions

Identify the main parts of Electrical Conductivity Apparatus and their functions

1- A). Which of the following could be used as a discharge device in an inductive AC circuit? a) resistor b) diode c) metal oxide varistor d) "a" and "c", not "b" B. What is the purpose of a discharge device used in conjunction with opening a highly inductive circuit? a) to minimize the possibility of damage to the circuits insulation as a result of a high induced voltage b) to minimize the possibility of endangering the life of the person opening the controlling switch c) to allow the magnetic field to gradually collapse, thus limiting the value of the self-induced ernf d) all of the above C. The high voltage induced by an inductor when its circuit is opened could be used constructively for a) an automotive ignition system b) an electric fence c) both "a" and "b" d) neither "a" nor "b"

6. You take a copper wire as shown in the figure, where the cross-section area A doubles between parts 1 and 2 of same length, and apply a potential difference across it so that a current flows from part 1 to 2. What happens in part 2 of the wire, as compared to part 1?" r A) The electron current increases B) The electron density increases C) The resistance increases D) The electric field or drift speed decrease E) The electric field and drift speed decrease E

. What is the purpose of a discharge device used in conjunction with opening a highly inductive circuit?a) to minimize the possibility of damage to the circuits insulation as a result of a high induced voltage b) to minimize the possibility of endangering the life of the person opening the controlling switch c) to allow the magnetic field to gradually collapse, thus limiting the value of the self-induced ernf d) all of the above

Q3) The self capacitance of each unit in a string of four suspension insulators is C. The shunting capacitance of the connecting metal work of each insulator to earth is 0-2 C. Calculate (i) the voltage across each insulator and (ii) string efficiency.

one turn of a copper bar is produced by cutting copper washer along a radius and spreading the ends. The washer is cut from soft drawn copper having a resistivity at 20 degrees celsiu of 1.732 micro ohm-cm. The washer is 0.125 inch thich and has inside diameter and outside dianmeter of 1 inch and 9 inches respectively. Calculate the exact resistance between the two end of the turn. Assume the contact along the ends of the turn to be perfect over the entire crown section.

Q3: Two circuits are arrange as shown in figure (1), (a and b) each one of them has two identical conductors , the vertical distance between each conductor in the same circuit is 1 m, the distance horizontlly between circuits is 30 cm, take 1 cm as diamter for each conductors. Derermine the inductance per km of the double circuit ? a a' b' FIGURE (1)

Fundamentals of Electric Circuit

how does the electrostatic discharge occur in the following situation? explain with suitable mathematical substantiation  a. Insulator surface are rubbing together. b.Insulator surface are pulling apart.

Alternating current is __________. Select one: A. AN ALTERNATING FLOW OF ELECTRONS B. ELECTRONS REVERSING THEIR FLOW AT REGULAR INTERVALS C. THE MOST COMMONLY USED CURRENT D. ALL OF THE ABOVE

Questions: 1. Are the experimental and theoretical values of voltages and currents match? Indicate the percentage of differences. 2. Give possible reasons for any discrepancies

Fundamentals of Electric Circuits

Question A suspension type insulator has three units with self-capacitance C and ground capacitance 0.1C. What will be the string efficiency?

A wire of 68 in length and 7 mm2 has a resistance of 0.98 ohms. A 136-m length of wire of the same material has a resistance of 4 at the same temperature. Find the radius of this wire. The final unit must be in millimeter, mm.   Round your answer to 2 decimal places.

Can you explain in detail? Thank you HIGH VOLTAGE Define Pschen’s theory related to breakdown of gaseous insulating material.

Notes on the verification of ohm's law by voltage method?

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

Write a short report about the following electrostatic application: * Laser Printers

An iron core 0.4 m long and 5 cm2is wound with 300 turns. When a current of 0.5A flows in the coil, how much is the inductance of the coil. Assume the core has a permeability of 2500.

Give five factors that affect electrical conductivity and why.

11. There is 900 mA of current through a wire with 40 turns. What is the reluctance of the circuit if the flux is 400Wb? 14,400 At/Wb B 1,440 At/Wb Ⓒ9,000 At/Wb O90,000 At/Wb Answer: Option O Explanation: No answer description is available. Let's discuss.