Calculate the diameter of a 0.04-cm length of tungsten filament in a small lightbulb if its resistance is 22 2. If 70mA current flows through the filament, find the potential difference across the source. (a) the diameter of the wire (in m) = (b) Potential difference across the source in V =

Calculate the diameter of a 0.04-cm length of tungsten filament in a small lightbulb if its resistance is 22 2. If 70mA current flows through the filament, find the potential difference across the source. (a) the diameter of the wire (in m) = (b) Potential difference across the source in V =

Inquiry into Physics

8th Edition

ISBN:9781337515863

Author:Ostdiek

Publisher:Ostdiek

Chapter7: Electricity

Section: Chapter Questions

Problem 15Q: (Indicates a review question, which means it requires only a basic understanding of the material to...

See similar textbooks

Similar questions

(Indicates a review question, which means it requires only a basic understanding of the material to answer. Questions without this designation typically require integrating or extending the concepts presented thus far.) . A solid metal cylinder has a certain resistance. It is then heated and carefully stretched to form a longer, thinner cylinder. After it cools, will its resistance be the same as, greater than, or less than what it was before? Explain our choice.
By measuring the currents and times and then draw the current vs time graph using the measurementat the lab for ε =8 V, R=1M Ω and C=60μF. What is the current at t=50 s? values obtained after the experiment:I0=8μAApproximate time until current becomes zero= 180 s
What is the steady-state current I, in units of Ampere, (steady-state current= current when you wait very very long time ) through 8V battery if you replace R1 resistor by 7 Ohm, R2 resistor by 19 Ohm, ε emf by 10 V. Your result must contain two decimal places. Maximum of 4% of error is accepted in your answer.
1. What current does a stereo receiver draw if used for 2 minutes and goes through 10 coulombs of charge? 2. How long can a flashlight run for if it draws 0.11 amps and its battery contains 10 coulombs of charge?
2. Suppose your phone's battery has a capacity of 2900 mAh and a potential difference of 3.8 V. What is the amount of charge, in C (coulombs), that is stored in your smartphone battery when it's fully charged?Charge = _____ C 3. Smartphone chargers are usually labeled with their current output in A (amps). Suppose your charger delivers a current of 1.1 A. If your phone's battery is completely drained, how long will it take to fully charge the battery using your charger?Charging time = _____ hours 4. Smartphones are advertised with a certain amount of "talk time", i.e., how long the phone's battery will last if you are making a call. If your phone is advertised with 24 hours of talk time, what is the average current coming from your phone's battery while making the call?Average current = _____ A 5. What is the average power output of your phone's battery while you're making a call?Average power = _____ W
27.64. Please help with the following problem. I attached a screeshot of it as well. An aluminum wire consists of the three segments shown in the following figure. The current in the top segment is 13A Part A For each of these three segments, find the current 'I'. (It should be equal to just one current, i.e. find Itop, Imid, Ibottom = ? ) Part B For each of these three segments, find the current density J. Jtop,Jmid,Jbot Part C For each of these three segments, find the electric field E. Etop,Emid,Ebot Part D For each of these three segments, find the drift velocity vd. (vd)top,(vd)mid,(vd)bot Part E For each of these three segments, find the electron current i. itop,imid,ibot
A beam of protons is moving toward a target in a particle accelerator. Thisbeam is a current whose value is 0.50 µA. How many protons strike thetarget in 15 s?
A capacitor with square plates, each with an area of 34.0 cm2 and plate separation d = 2.64 mm, is being charged by a 215-mA current. (a) What is the change in the electric flux between the plates as a function of time? (Use the following as necessary: t. Do not use other variables, substitute numeric values. Assume that dΦE/dt is in V · m/s and t is in seconds. Do not include units in your answer. Enter the magnitude.) dΦE dt = (b) What is the magnitude of the displacement current between the capacitor's plates?
A bird lands on a bare copper wire carrying a current of 32 A. The wire is 6 gauge, which means that itscross-sectional area is 0.13 cm2. (a) Find the difference in potentialbetween the bird’s feet, assuming they are separated by a distanceof 6.0 cm. (b) Will your answer to part (a) increase or decrease ifthe separation between the bird’s feet increases? Explain.
1.) The radius of 22-gauge Nichrome wire is 0.32 mm. (a) Calculate the resistance per unit length of this wire. (b) If a potential difference of 10 V is maintained across a 1.0-m length of the Nichrome wire, what is the current in the wire? 2.) An electric heater is constructed by applying a potential difference of 120 V across a Nichrome wire that has a total resistance of 8.00 V. Find the current carried by the wire and the power rating of the heater.
In the figure below a bar of length L, width w, and thickness d is positioned a distance h underneatha long straight wire that carries a large but unknown steady current Iwire (w is small compared to h,and h is small compared to the length of the long straight wire). The material that the bar is madeof is known to have n positive mobile charge carriers (“holes”) per cubic meter, each of charge e, andthese are the only mobile charge carriers in the bar. An ammeter measures the small current I passingthrough the bar. (a) Draw connecting wires from the voltmeter to the bar, showing clearly how the ends of the con-necting wires must be positioned on the bar in order to permit determining the amount of current in the long straight wire Iwire. If the voltmeter reading ∆V is positive, does the current in thelong straight wire run to the left or to the right? Explain briefly. [2](b) If the voltmeter reading is ∆V , what is the current in the long straight wire, Iwire? Express your 4 answer for…
A fisherman has netted a torpedo ray. As he picks it up, this electric fish creates a short-duration 50 V potential difference between his hands. His hands are wet with salt water, and so his skin resistance is a very low 100 Ω. What current passes through his body? Will he feel this DC pulse?