A wire is drawn through a die, stretching it to three times its original length. By what factor does its resistance increase?

Q: When resistors 1 and 2 are connected in series, the equivalent resistance is 19.9 Q. When they are…

A:

Q: what diameter must be chosen for the new wire?

A: Given: Initial length of wire is Li=4.635 m Initial diameter of wire is di=6.53 mm Length of new…

Q: What is the equivalent resistance between points a and b? What voltage would a power source need to…

A: Equivalent resistance in series R = R1 + R2  Equivalent resistance in parallel 1/R = 1/R1 + 1/R2

Q: A cube of a material of side 1 cm has a resistance of 0.001 Ω between its opposite faces. If the…

A: GivenSide of cube, l1=1 cmResistance, R1=0.001 ohmSame volume of material hasLength of side, l2=8 cm

Q: The current in the figure below is 0.57 A. (Let the internal resistance of battery 1 be r1 = 1.5 Ω…

A:

Q: A 200 μF defibrillator capacitor is charged to 1200 V. When fired through a pa- tient's chest, it…

A: Let initial charge = QAfter , the final charge Q(t) = 0.05 Q (Since, 95 % lose)Voltage Capacitor…

Q: You have four homogeneous wires made of the same material. Each wire has a diameter of 3 mm and a…

A:

Q: An auto mechanic needs to determine the emf and internal resistance of an old battery. He performs…

A: An old battery measurement by the voltmeter is 11.7VThe ammeter reading is 17.1A

Q: When resistors 1 and 2 are connected in series, the equivalent resistance is 16.1 Q. When they are…

A: given,resistors are in series, so R=R1+R2and for parallel connection,1R=1R1+1R2

Q: If the resistivity of a particular wire is 75.56x10-8 Ω⋅m, the wire is 48.16mm in length, and the…

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Q: Suppose you wish to fabricate a uniform wire from 2.40 g of copper. The wire is to have a resistance…

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Q: An auto mechanic needs to determine the emf and the internal resistance of an old battery. He…

A: emf= 11.9 V Internal resistance = 0.7484 ohm.Explanation:Step 1:Step 2:

Q: When a 1.50V battery is shorted by a copper wire whose resistance can be ignored, the current…

A: battery voltage V =1.50 voltCurrent i = 1.53A

Q: An auto mechanic needs to determine the emf and internal resistance of an old battery. He performs…

A: Emf=11.8v Current=17.7A

Q: A metal wire of resistance 16 Ω and length L is cut into two pieces of equal length. The two pieces…

A: Given: The resistance of the metal wire is 16 Ω. Introduction: Resistance is a measure of the…

Q: A metal wire of resistance R is cut into eight equal pieces that are then placed together side by…

A: The initial resistance of the wire is given as R. Now there can be two ways to solve this question.…

Q: Resistance

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Temperature Variance of Resistance

Electrical resistance or simply resistance is the property of a material that opposes the free flow of electrons through it. The total amount of resistance to the flow of charges (or current) is affected by many factors like the length of the conducting material, its cross-sectional area, resistivity, and temperature.