PHY 112 Lab 3

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.

Please show the exact way to make it in this simplest forms

Electrical Engineering I'm reading about the electronics in touch screen. It says when i touch the panel it distorts the electrostatic field and thus will have a change in capacitance. This is how it detects My question is the electrostatic field same as electric field? Please explain in details How did the capacitance change when i just touch the panel

How temperature effect conductivity? Explain with the help of following equation. m e'n7'

this is the ability of a material to conduct electricity  a. impedane  b. conductance c. reactance  d. capacitance

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

A fuse wire of circular cross-section has a radius of 0.8 mm. The wire blows off at a current of 8A. Calculate the radius of the wire that will blow off at a current of 1 A. Also calculate the Value of blow off current when radius is 0.5 mm

Enumerate 10 important Electrical Materials and briefly describe each.

A rubber rod is rubbed with fur, so that the fur becomes positive. The rod is then used to charge an electroscope. The charge on the electroscope will be:positive if charged by contact. neutral. positive if charged by induction.negative if charged by induction.

Fundamentals of Electric Circuits

QUESTION 3 E-05, PC-05. While testing of capacitor with the Multimeter it will show value of? will indicate charge voltage. some resistane. Cwill indicate amount of current it has. QUESTION 4 E-05, PC-02. What are the factors affecting the capacitance of capacitor. Area of plates only. O Area of plates and Dielectric media. O Area of plate, dielectric and distance between plates.

3. A particle with a charge of 8nC is 4m away from a charge of 10C. What is the electric potential energy?

b. A piece of pencil lead is connected in series with an ammeter and a power supply. The power supply is turned on. After a few minutes, although the potential difference across the pencil lead does not change, the current in the circuit increases significantly. Explain why the current increases. c. Electric fields are caused by both point charges and by parallel plates with a potential difference across them. Describe the difference between the electric field caused by a point charge and the electric field between parallel plates. Your answer should include a diagram of each type of field and reference to electric field strength. Question 2

Four point charges are placed at corners of a square . At the top left is a charge of - 1 C, at the top right is a charge of - 2 C, at the bottom right is a charge of -3 Cand at the bottom left is a charge of - 4 C. What is the direction of the net electric force due to the four point charges on a positive charge Q located at the center of square ? O due North O due South O Sw O SE

Consider the circuit below. Point b is grounded(potential=0). Determine the potential at a. Two resistors of cylindrical shape, A & B, made from the same material. The length of resistor A is twice that of resistor B. The diameter of B is half that of A. Determine the ratio of Resistance of A/Resistance of B.

Give one example of where Lattice Vibrations occur in Superconductivity.

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

What is Resistance and inductance.

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.

Identify the statement from the following when the inductance can have high value. a. All the given options O b. If the number of turns of the wire is more O c. If the length of the wire is longer O d. If the cross-sectional area is less

2. Determine the time required for 4 x 1016 electrons to passthrough the imaginary surface of the figure if the current is 5mA.

mp?attempt=2176198&cmid%3D1088508page%3D6 Question 7 Not yet anwend Marked out of 10.00 Hlag question The line shown in the figure has a linear charge distribution of 101 nC/em. If R=8 cm, find the Electric Potential at the point indicated by the dot. Scan clearly your detailed answers and upload it in question 8. R. 2R V=224016.68 V V=134410.01 V V=448033.36 V V=672050.04 v

Examine the circuit given below. What is this circuit used for? Write. Exit Simply draw the image taken from the oscilloscope. Calculate separately the times when the led stays on and off. (Note: The charge time of the capacitor C1 can be calculated with 0.693(R1+R2)C1 and the discharge time with 0.692R2C1)

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

1. Write the answer for the following questions. A. Define Electric field strength. B. What are the factors affecting the capacitance of a parallel plate capacitor? C. State the coulombs Law with its equation.

Partial discharge is an electrical discharge or spark that bridge a small portion of the insulation between two conducting electrode. Distinguish internal and surface discharge with the help of diagrams.