A graphite lead (diameter of 0.5mm, length of 5cm) reaches a temperature of 3077K when a voltage difference of 30.7 V is applied across its ends. Find the current (in A) through the lead.

Q: Let's say you have a 20 cm long silicon wire, with a diameter of 4 cm. What current flows through…

A: Write the given values with suitable variables. L=20 cm=0.2 mr=4 cm2=0.02 mV=1000 Vρ=2300 Ω.m Here,…

Q: Copper wire gas resistivity density=1.7x10^-8 omega•m what at 20 degrees X and it has a temps tire…

A: The resistivity of the copper is given as, ρ=1.7×10-8 Ω, At 20oC, the temperature coefficient is…

Q: A Cu wire of diameter of 2 mm and length of 1 m initially at room temperature of 300 K is applied a…

A: “Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: A common flash focus is rated at 310 mA and 2.90 V, the respective current and voltage values under…

A: Current is Voltage is Resistance of filament at temperature  is The coefficient of expansion for…

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Q: A brine sample recovered from depth of 8400 ft has a measured resistivity of 0.28 ohm-m at…

A: given   A brine sample recovered from depth of 8400 ft has a measured resistivity of 0.28 ohm-m at…

Q: Question 5 .... A current of 3.70 A is carried by a 250 m long copper wire of radius 1.25 mm. Assume…

A: current (i) = 3.70 A Length (L) = 250 m radius (r) = 1.25 mm electronic density (n) = 8.47×1028 m-3ρ…

Q: Determine the current per unit area through a 5.02 V silicon junction with a length of 1.64 mm.…

A: Data:* Resistivity of silicon, ρ = 640Ω m* Voltage , V = 5.02 V* Length , l = 1.64 mm…

Q: The current I is measured through a sample of an ohmic material as a voltage V is applied. (a) What…

A: Given data: The original voltage is: V The new voltage is: V’ The original current is: I The new…

Q: 7. 6. 650 J of energy are converted into heat in 2 minutes. What power is dissipated? Find the power…

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Q: Two cities separated by 10,000 ft is connected by telephone wires whose thermal coefficient of…

A: distance between two cities (d) = 10000 ft thermal coefficient of resistance (α) = 0.0003 per degree…

Q: Speed of conduction of Aluminum?

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Q: What is the conductance of a 1.0-mm-diameter, 10-cm-long blood vessel filled with blood? Express…

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Q: A typical flash bulb is rated at 310 mA and 2.90 V, the respective values of current and voltage…

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Q: Aluminum has 62% of copper conductivity but is just 30% the weight of copper. Show that this means…

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Q: Copper wire has a resistivity p= 1.7 x 10-8 2-m when at 20°C and it has a temperature coefficient a…

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Q: The current density in a wire diameter 1-02 mm is 1.75x 105 Alm2. the number of free electrons per…

A: Given data: Diameter of the wire, d =1.02mm Current density, J =1.75×105 A/m2 Number of free…

Q: The resistance of a cleaved single crystal of NaCl is measured as 100 ohms. The dimensions of the…

A: Given that the resistance of a cleaved single crystal of NaCl is measured as 100 Ω. Dimensions of…

Q: Problem 5: A nichrome rod of length LN 58 cm is connected in series (end to end) to a carbon rod of…

A: Resistanace of a material is given as,R= Resistance of the materialL= length of the materialA= Cross…

Q: ha, Ta Trasho ーLA Composite wall with contact resistance A plane composite wall (as shown in figure)…

A: Solution: B2. Each layer of composite wall offers thermal resistance. This composite wall is exposed…

Q: The electrical resistance in ohms of a certain thermometer varies with temperature according to the…

A: R = R0  [1 + α (T – T0 )] . . . . . . . . . . . (1)Here, R0 and T0 are the initial resistance and…

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Q: a current of 1.50 A at a voltage difference of 5.00 V is passed through the cell for 101 minutes,…

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Q: Consider the following table showing temperature as a function of resistance: R(ohm) Temp (°C)…

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Q: A constant diffusion current of electrons is established through a silicon semiconductor material.…

A: Given:- Jn = -0.8 A/cm2 = -8000 A/m2 n = 1.5 x 1015 /cm3 = 1.5 x 1021 /m3 De = 35 cm2/s = 35 x 10-4…

Q: A 20-V storage battery delivers current at the rate of 53 A. In a 28-min period, the heat lost from…

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Q: Which of the following represents the characteristic curve of a copper wire?

A: Current is defined as a charge flowing through a circuit per unit of time.

Q: A tooster has a heating element of Nichrome. It is connected to a source of 240 V at Temperature 20…

A: Given Data : Voltage, V=240 V Initial current, Ii=2 A Final current, If =1.5 A Initial temperature,…

Ohm's law

Ohm’s law is a prominent concept in physics and electronics. It gives the relation between the current and the voltage. It is used to analyze and construct electrical circuits. Ohm's law states that the voltage across a conductor is directly proportional to the current flowing through it.

Path of Least Resistance

In a series of alternate pathways, the direction of least resistance is the actual or metaphorical route that offers the least resistance to forwarding motion by a given individual or body.