Question: In order to for a material to be good conductor, what must be the value of its thermal conductivity?
Q: An electric immersion heater has a power rating of 1800 W. If the heater is placed in a 1.3 kg of…
A: Given data: Mass (m) = 1.3 kg Initial temperature (Ti) = 30°C Final temperature (Tf) = 100°C…
Q: 2) a) A 40-m length of copper wire at 20 deg c has a diameter of 0.3 mm. If a potential difference…
A: length of wire l =40 m diameter of wire d =0.3 mm = 0.3 x 10-3 m radius of wire r = d/2 = 0.15 x…
Q: At what temperature will silver have a resistivity that is two times the resistivity of iron at room…
A: The resistivity of silver is calculated as, Rt = R0[1+α(T-T0)] Here, Rt is the resistivity…
Q: a) A hot water heater in a residential home runs for an average of 3 hours per day with a heat…
A: This question is based on electrical energy consumed in a domestic connection. The SI unit of energy…
Q: What is the conductance of a 1.0 mm diameter, 10 cm-long blood vessel filled with blood? Express…
A: To calculate the conductance of a blood vessel, we need to know its dimensions and the electrical…
Q: a) If the electron concentration increase along the x-axis of a conductor as shown in equation…
A: Diffusion current is the current caused by the diffusion of current carriers, that is, holes and…
Q: A 12.5m long wire (radius=1.2mm), operating through a constant potential difference of 12volts, is…
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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: Describe a platinum resistance thermometer. How would you calibrate and use it for measuring…
A: Resistance thermometers or Resistance Temperature Detector (RTD). It uses resistive elements to…
Q: a current 2A flows in a copper wire over a length of 3 km and 1,1 mm.known copper conductivity is…
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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…
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Q: 2. a) The resistivity of copper is 1.7241 x 10-8 (-m) at 20°C. What is the conductivity of copper at…
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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: A uniform cross-section of silver has a resistivity of 1.54 x 10-8 2 m at room temperature. For an…
A: Given data: Resistivity of silver (ρ) = 1.54 × 10-8 Ω.m Electric field (E) = 1 Volt/cm Density of…
Q: Copper wire has a resistivity ρ = 1.7 × 10-8 Ω⋅m when at 20°C and it has a temperature coefficient α…
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Q: Choose the correct alternative:(a) Alloys of metals usually have (greater/less) resistivity than…
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Q: Find an expression for the temperature T2, at which the resistance of a particular wire will be…
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Q: 1. What is the conductance of device consisting of two concentric metal shells, the inner one having…
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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: 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…
Q: A uniform cross-séction of šilver hås à resistivity of 1.54 × 10-8 2 m at room temperature. For an…
A: Resistivity ρ= 1.54×10-8 Ωm n=5.8*1028 E=1 v/m σ=1ρ=11.54×10-8 Ωm=6.49×107 Ω-1m-1 b. mobility,…
Q: A copper wire is 10 cm long and has a cross-sectional area of 0.4 mm^2 and the resistance of the…
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Q: If we have a material with the same electrical properties in all directions, we define its…
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Q: discuss how current flows in n type and p type semi-conductors
A: In n type material many conduction band electrons are present. The electrons will move towards the…
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: How many seconds will it take for 9.5 x 10¹² electrons (1.6 x 10^-19 C), take to pass through a…
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Q: In the circuit shown, R,=R,=R, and ɛ2 =. The rate of heat dissipated by the whole circuit is 110…
A: From the given circuit diagram, when the batteries are ideal,
Q: A close analogy exists between the flow of energy by heat because of a temperature difference (see…
A: The Ohm’s law is given by:
Q: A block in the shape of a rectangular solid has a cross-sectional area of 4.00 cm^2 across its…
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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…
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Q: An immersion heater utilizing 120 V is used to raise the temperature of a 100 g aluminum cup…
A: Total energy supplied by heater is as follows: Et=E1+E2+E3+E4…
Q: In the illustration below, suppose a moving rod is 0.14 m long, the velocity v is 255 cm/s, the…
A: Given, Length of the rod, l = 0.14 m the velocity of the rod, v = 255 cms = 2.55 ms resistance of…
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