A fuse in an electric circuit is a wire that is designed to melt, and thereby open the circuit, if the current exceeds a predetermined value. Suppose that the material to be used in a fuse melts when the current density rises to 440 A/cm2. What diameter of cylindrical wire should be used to make a fuse that will limit the current to 0.50 A?

Q: For safety reasons, electrical codes have been established that limit the amount of current a wire…

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Q: A beam of protons is moving toward a target in a particle accelerator. This beam constitutes a…

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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 wire is 1.1 m long and 1.2 mm2 in cross-sectional area. It carries a current of 4.8 A when a 2.4 V…

A: The length of the wire L = 1.1 m  The cross-sectional area of the wire = 1.2 mm2 The carries a…

Q: A rectangular block of copper has sides of length 13 cm, 27 cm, and 46 cm. If the block is connected…

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Q: A wire is 100.0 m long and 0.800 mm in diameter. The first x meters of the wire is made of copper…

A: Given: The length of the wire is 100 m. The diameter of the wire is 0.800 mm. The potential…

Q: A spool of copper wire 290 m long and with a diameter of 0.360 mm is at 20.0°C. For copper, the…

A: The wire's resistivity is, ρ=1.7×10-8 Ω The wire's length is, L=290 m The radius of wire is, r=0.360…

Q: A rectangular block of copper has sides of length 14 cm, 26 cm, and 41 cm. If the block is connected…

A: The actual current, if the 8 volt source is a theoretical perfect source, can be done by calculating…

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Q: A copper wire has a cross-sectional area of 3.31× 10-6m². It carries a constant current of 10.0 A.…

A: Given value--- Area = 3.31 × 10-6 m2 . Current = 10 Amp. density of copper = 8.92 g/cm3 . molar…

Q: A fuse in an electric circuit is a wire that is designed to melt, and thereby open the circuit, if…

A: A fuse in an electrical circuit is a wire that is designed to melt if the current density rises 520…

Q: At 20°C, a 7.5 m long copper wire has a cross-sectional diameter of 1 mm. If 15 A of current flow…

A: temperature, T=20 o C length of copper wire, l=7.5 m cross-sectional area, A=1 mm= 1x (10-3 m)2 = 1…

Q: When a current flows in an aluminum wire of diameter 2.83 mm, the drift speed of the conduction…

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Q: When a current flows in an aluminum wire of diameter 4.67 mm,4.67 mm, the drift speed of the…

A: Radius of the aluminium wire(r)=Diameter of the wire2=4.67×10-32=2.335×10-3mArea of the…

Q: A copper wire and an iron wire of equal length L and diameter d are joined and a potential…

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Q: An aluminum wire of a certain length is connected to a precise power source of 10.00 V, then a…

A: Potential difference = 10 V  Current at 20° C = 0.4212 A  Current at unknown temperature T = 0.3818…

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Q: The copper windings of a motor have a resistance of 46 Ω at 20oC when the motor is idle. After the…

A: Initial resistance of copper windings (r) = 46 ohm initial temperature of the copper windings (t) =…

Q: Current and Resistance Problem 18:   Consider two wires made of different materials. Wire A has a…

A: Please see the attached image for the solution.If there are queries or if the image is not loading,…

Q: A 7-Ampere current runs through a 12-gauge copper wire (diameter = 2.05 mm) and through a light…

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Q: A 24 m length sample of an unknown metal wire is connected to a known ?= 0.56 Ω resistor and a ?= 24…

A: The current through the known resistance and wire is same since they are series. the current through…

Q: A 54.0-g sample of a conducting material is all that is available. The resistivity of the material…

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Microscopic view of current

In physics, the term current is expressed as the rate of flow of electric charges across the area per unit time (I=q/t). It propagates along in the direction of the motion of positive charges. When the current is caused by the motion of electrons, the direction of the current is opposite to the flow.