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,…

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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…

Q: 12.12. The time before failure of each a platinum resistance thermometer used in a particular…

A: Mean =∑xNN=10

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Q: 13-V storage battery delivers current at the rate of 59 A. In a 25 min period, the heat lost from…

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Q: A spool of copper wire 290 m long and with a diameter of 0.480 mm is at 20.0°C. For copper, the…

A: Given value--- length = 290 m. diameter = 0.48 mm. initial temperature = 20 degree C.  resistivity…

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: Aluminum, copper, gold, and nichrome wires of equal lengths of 1.0  10-1 meter and equal…

A: Given  Length (L)= 1.0 × 10-1 m  Area of cross section (A) = 2.5  10-6 m2  Temperature (T) = 20 ° C…

Q: A copper wire 85 m long must experience a voltage drop of less than 1.2 V when a current of 1.7 A…

A:

Q: The resistivity of a metal increases slightly with increased temperature. This can be expressed as…

A:

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: 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: An electric heating device consumes a current of 1.98 A when connected to the 220 V mains supply. If…

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Q: Copper wire has a resistivity ρ = 1.7 × 10-8 Ω⋅m when at 20°C and it has a temperature coefficient α…

A:

Q: The resistivity of a metal increases slightly with increased temperature. This can be expressed as p…

A: Given data, Final resistance R=0.25 Ω Initial resistance R0=0.25 Ω Constant α=3.9×10-3 °C-1…

Q: A coil of copper wire has resistance of 90 ohms at 20 degree celsuis and is connected to a 230 V…

A: Given Resistance (Ro)          = 90 ohms Temperature T1   = 20° Temperature T2   = 60° Voltage (V)…

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A:

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: Calculate the specific conductivity of the conductor in Mega(Ωm)-1 since the current passing through…

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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…

A: Page 1

Q: A silver wire is 6.9 m long and 0.79 mm in diameter. What is itsresistance?

A: Given: The length of the wire is L=6.9 m. The diameter of the wire is d=0.79 mm.   The…

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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…

A:

Q: Q1: A conductive wire has a resistivity of (0.649×10-8(Q.m)') at room temperature are (5.8x10» )…

A: Given- Conductivity σ=0.649×10-8(Ω.m)-1So,Resistivity ρ=1σ=10.649×10-8=1.54×108Ω.m Conduction…

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: A copper wire 100m long with cross-sectional area of 2x10 -4 cm 2 is heated from room temperature of…

A: Given: Length of wire L = 100 m. Cross sectional area of copper wire (A) = 2×10-4 cm2 Initial…

Q: copper wire has a resistance of 15.0  at a temperature of 14 o C. After a current passes through…

A: The relation of temperature dependence of the resistance is given…

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.