A block of carbon is 3.0cmlong and has a square cross- section whose sides are 0.50cmlong. A potential difference of 8.4Vis maintained across its length.(a) What is the resistance(R) of the block?(b) What is the current(I) in this resistor?

A block of carbon is 3.0cmlong and has a square cross- section whose sides are 0.50cmlong. A potential difference of 8.4Vis maintained across its length.(a) What is the resistance(R) of the block?(b) What is the current(I) in this resistor?

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter9: Current And Resistance

Section: Chapter Questions

Problem 42P: What current flows through a 2.54-cm-diameter rod of Pure silicon that is 20.0 cm long, when 1.00103...

See similar textbooks

Related questions

Q: In the figure R - 140 0, R2 = 53 0, and the ideal batteries have emfs e - 8.0 V, 82 = 5.0 V, and Eg…

Q: A defibrillation unit used to electrically stimulate the heart muscles following a heart attack…

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: (a) A potential difference of 12 V is applied to a 250@Ω resistor. How much current flowsthrough the…

A: Solution:- a) As per ohm's law, V = IR, I = V/R and R = V/I. Where I is amperes. So you have the…

Q: (!) THE FOLLOWING QUESTIONS ARE BASED ON THE INFORMATION GIVEN HERE. A rod of semiconducting…

Q: A wire with a resistance of 4.7 Ω is drawn out through a die so that its new length is 3 times its…

A: Given value--- A wire with a resistance of 4.7 Ω is drawn out through a die so that its new length…

Q: The next five questions use this description. Dry air is a pretty decent insulator; it has a very…

A: We have to first calculate cross sectional area of the plates of the capacitor. from given…

Q: In the figure R = 4.17 Q, R2 = 12.5 Q, and the ideal battery has emf ɛ = 12.3 V. (a) What is the…

A: R1 = 4.17 ohm R2 = 12.5 ohm E = 12.3 volts time = 2.23 min = 133.8 sec

Q: Suppose you wish to fabricate a uniform wire out of 1.25 g of copper. If the wire is to have a…

A: Given: M=1.25 Density(D)=8940 Kg/m3 Resistivityρ=0.0171 Ωm To find: (a)Length of the uniform copper…

Q: Suppose you wish to fabricate a uniform wire from 1.60 g of copper. The wire is to have a resistance…

A: (a) Let V be defined as the volume, and m be defined as the mass of copper. The density (d) of the…

Q: If the resistor is made of carbon, what will its resistance be when its temperature is increased by…

Q: A wooden skewer and a piece of wire have the same dimensions: a length of 0.20 m and a…

Q: (b) A voltage of 3 V is applied across the ends of a copper alloy conductor which has a resistance…

Q: The wires of our appliances are insulated with a material mixed with rubber, which has a very high…

A: The resistance of the given rubber is R=ρlA=ρlπro2-πri2=ρlπro2-ri2

Q: A block of carbon is 3.6 cm long and has a square cross-sectional area with sides of 6.2 cm. A…

Q: A wire with a resistance of 6.0 is drawn out through a die so that its new length is three times its…

Q: The capacity of a storage battery, such as those used in automobile electrical systems, is rated in…

A: When a potential difference is present across a conductor, and a current passes through it, the…

Q: There is a potential difference of 0.90 V between the ends of a 20 cm long graphite rod that has a…

Q: The resistance R of a copper wire at temperature T = 25 °C is R = 112. Estimate the resistance at T…

A: The resistance R of a copper wire with a temperature T in C is R(T).Then, given that R(25)=11 and…

Q: An ideal voltmeter V is connectedto a 2.0 Ω resistor and a battery withemf 5.0 V and internal…

A: Given: An ideal voltmeter V is connected to a 2.0 Ω resistor and a battery with emf 5.0 V and…

Q: (3). A thin wire of length L, and cross sectional area 4 oriented in the x- direction is made of…

A: Given the resistivity of wire varies as, ρ=ρ∘e-xL Here, L is the length of the wire. According to…

Q: For some an application, it is important that the value of a resistance not change with temperature.…

A: Given: Total resistance of carbon & nichrome wire-wound resistor, Rt=4.7 kΩ Standard data:…

Q: A wire with a resistance of 7.6 S is drawn out through a die so that its new length is 3 times its…

Q: When applying Kirchhoff's voltage law, if you measure the voltage across a battery from the negative…

A: Kirchhoff's Voltage Law states that the total voltage around any closed loop in a circuit is equal…

Q: (a) What will happen to the material’s resistivity if the resistance is increased? (b) What will…

A: Concept Resistivity is dependent only on the composition of the material and the temperature.

Q: By ignoring the internal resistance of the battery. Determine the unknown curreny( I), Resistance…

A: For the given circuit diagram,

Q: The wires of our appliances are insulated with a material mixed with rubber, which has a very high…

A: Here the inner surface diameter is 0.5 mm and the outer surface diameter is 5 mm. Again the length…

Q: A rod of semiconducting material of length L = 10 m and cross-sectional area A = 4.5 mm² lies along…

A: Write a given values of this question. L=10mA=4.5mm2=4.5×10-6m2ρ∘=5×10-4Ω.mV∘=30V

Q: A wire with a resistance of 8.6 Ω is drawn out through a die so that its new length is 3 times its…

A: Relation between resistance and resistivity is,

Q: Ex. 83 : The e.m.f. of a cell is balanced by fall of potential wire. If a resistance of 8N is…

Q: The average bulk resistivity of the human body (apartfrom surface resistance of the skin) is about…

A: Part (a) Given: The resistivity of human body is ρ=5 Ω·m. The length of cylinder is L=1.6 m. The…

Q: 4 (a) What is the equivalent resistance between points A and B? (b) A 276 V emf is connected to the…

Q: The emf of a battery is E = 12 V . When the battery delivers a current of 1 A to a load, the…

A: Given: The emf of the battery is 12 V. The terminal voltage is 10 V. The current in the circuit is 1…

Q: (b) Calculate the current in each resistor if a potential difference of 72.0 V is applied between…

Q: For some an application, it is important that the value of a resistance nof change with temperature.…

A: The resistivity of carbon resistor, : 3~60*10^-5The resistivity of Nichrome resistor, :…

Q: (1) Current density describes how charges flow through an extended object such as a wire. (II)…

A: Current density is the amount of charge flowing per unit time through unit cross sectional area of…

Q: (c) Find the resistance per unit length of a gold wire with radius of 0.025 m. Given the…

Concept explainers

Resistivity

Resistivity is a characteristic property of the conductor’s material that measures the extent to which the material opposes the flow of current. It is denoted by the Greek letter “rho”. Electrical resistivity, also known as specific resistance, depends on the nature of the material of the conductor and is unaffected by its dimensions.

Question

100%

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step 3

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 3 steps with 3 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.

Similar questions

Help!!!
) An electron beam consist of 1016 electrons passing through a given cross section n one minute. (a) Determine the current in amperes. (b) If the potential difference between the tip of the electron gun and the screen is 5000 V, determine the resistance of the path taken by the electron beam.
please solve asap and in detail
= 3. A regular tetrahedron is a pyramid with a triangular base. Six R 10.0 resistors are placed along its six edges, with junctions at its four vertices, as shown in Fig. 3. A 12.0-V battery is connected to any two of the vertices. Find (i) the equivalent resistance of the tetrahedron be- tween these vertices and (ii) the current in the battery. R m Ꭱ R
In the figure, the batteries have electromotiveforces E1 = 10 V, E2 = 5 V, and the resistances are each 5 Ω.(a) Find the current in all resistors.(b) What is the potential difference between point A and B?
The wires of our appliances are insulated with a material mixed with rubber, which has a very high resistivity. If a certain wire has a length of 2.5m, the outer diameters is 5mm and its inner diameter is 0.5mm, what is its resistance? Note that the inner diameter is present to leave a hollow place where the conducting wire (usually copper) is present.
A 60 W lightbulb typically has a current of 0.50 A flowing through it. Calculate (a) the number of electrons passing a cross section of the bulb’s filament each second and (b) the number that pass the section in 1 h.
(a) Copper Copper Nichrome In the circuit shown in the diagram, two thick wires connect a 1.6 volt battery to a Nichrome (NiCr) wire. Each thick connecting wire is 14 cm long, and has a radius of 9 mm. The thick wires are made of copper, which has 8.44 -1028 mobile electrons per cubic meter, and an electron mobility of 0.00424 (m/s)/(V/m). The Nichrome wire is 5 cm long, and has a radius of 4 mm. Nichrome has 9.1 -1028 mobile electrons per cubic meter, and an electron mobility of 7.1E-5 (m/s)/(V/m). What is the magnitude of the electric field in the thick copper wire? 13.571 (b) What is the magnitude of the electric field in the thin Nichrome wire? V/m V/m
1 A 24 V potential difference is supplied across a 15 N resistor. (a) Calculate the current flowing through the resistor. (b) If the circuit runs for 3 hours, calculate the total number of charged particles that have passed through the resistor over that period. [Ans: 1.6 A, 1.08 x 10²3 e - ]
O) A wooden skewer and a piece of wire have the same dimensions: a length of 0.20 m and a cross-sectional area of 3x106 m². The resistivity of the wood is 3×10'0 S2m and the resistivity of the metal is 1.5x10-8 Qm, (a) What is the resistance of each object to the flow of electric current? (b) If a potential difference of 12 V exists between the ends of each object, find the current flowing through each. (c) The two objects are connected in parallel between a 12 V supply and ground. Find the resistance of the combination. (d) If you were forced to touch one of these objects in this circuit, which would you choose? Why?
An aluminum rod with a square cross section is 2.3 m long and 6.5 mm on edge. (a) What is the resistance between its ends? (b) What must be the diameter of a cylindrical copper rod of length 2.3 m if its resistance is to be the same as that of the aluminum rod? The resistivity of aluminum is 2.75 x 10-8 Q-m and the resistivity of copper is 1.69 x 10-8 Q-m. (a) Number i Units (b) Number Units
Two identical incandescent light bulbs, cach with R = 22, are connected to a V with E = SV and negligible internal R. Find the I through each bulb, the V across each bulb, and to the entire network if the bulbs are connected (a) in series and (b) in parallel. (c) Suppose one of the bulbs burns out; that is, its filament breaks and current can no longer flow through it. What happens to the other bulb in the series case? In the parallel case? I↓ (a) Light bulbs in series 8 = 8V₁ r=0 a Illustration. R=282 b R=202 wwww. C I total = 21 (b) Light bulbs in parallel 8=8V, r=0 R=20 www Lyotal