Lab2E-fieldandPotential

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

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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.

Please give proper justification for the answer in text.

For the current shown in the figure below, find the charge waveform and then find the value of charge at t=2 sec and t=10 sec (A) Timemee)

4- If electrons in an electron beam have a kinetic energy of K, and the magnitude of the electric field that stops them is E, what is the distance they take before they stop? O A RieE O y KIE KleE D) E) KeE

Question 5 a) i. 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. The current /in a length of aluminum of cross-sectional area A is given by the formula I= nevA ii. e is the charge on an electron. Show that the units on the left-hand side of the equation are consistent with those on the right-hand side.

By doing the " Coloumbs Law Lab " how do you calculate the electric force on suspended balloon and the charge on each balloon? Can you give an sample calculation

Breakdown strength of the gases experiment the current will be increased by a. Cathode produced electrons b. Anode attraction c. Free electrons d. Additional electrons

I Need help.

You are given two metal samples. The first one is pure and the other one is unrefined. Will there be a difference in their electrical conductivity? If so, how is this possible?

What is the purpose of waiting 1 s after a voltage pulse before measuring current in sampled current voltammetry?

true or false. pls no need explanation

Two point charges (C₁ and C₂) are fixed as shown in the setup below. Now consider a third test charge with charge -q that you can place anywhere you want in regions A, B, C, or D. In which region could you place the test charge so that the net force on the test charge is zero? A. Region A B. Region B C. Region C A-2q B C D D. Region D C13 C₂

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

1.   Explain the term “ mobility of charge carriers”.

1. The electric potential at a distance of 0.92m from a point charge is V. What is the quantity of the point charge?

2.Electric current is not produced by solar cell when a. When holes move to the p side b. When both holes and electrons move c. When electrons move to the n side d. When both holes and electrons do not move

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.

3. The length of a Germanium material is 10 cm and its area is 5 cm2. Check in slide 30 the resistivity. The current passing through this material is 5 microamperes at 27 °C. Determine the current density and voltage across the length of the material.

How about solving this using KCL equations? Thank you

The potential at a point due to a charge of 100 micro coulomb at a distance of 9m will be?

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)

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

How much work is required to move a charge of 0.0μC from a point r = 50 cm to a point r = 10 cm?

A photo voltaic cell is a device that produces electricity from the a. absorption of photons O b. sharing of electrons O c. splitting of nucleus O d. combining of protons

1-1)The length of Copper wire is 10m and its cross-sectional area is 0.5mm2 has a Calculate: resistance 0.34SN. a) The conductivity of Copper wire. b) the mobility of electrons in the copper wire.