Two pieces of wire arc soldered together and connected to a battery as shown. Each piece...
The picture shows a battery connected to two wires in parallel. Both wires are made of the same material and are of the same length, but the diameter of wire A is twice the diameter of wire B. True or False for the following: 1) The resistance of wire B is four times as large as the resistance of wire A. 2) The power dissipated in wire A is 16 times the power dissipated in wire B. 3) The voltage...
Two pieces of 14-gauge wire (diameter=0.163cm) each are 50m in length. One wire is made of aluminum, the other of tungsten; both are maintained at a temperature of 20°C. The wires are joined together at one end to form a sign wire of 100m length. A potential difference of 12V is applied across the length of this compound wire. (a) What is the resistance of each 50m segment? (b) What is the current in each? (c) What is the potential...
A 2.0m length of metal wire is connected to a 1.5 V battery, and a current of 5.0mA flows through it. What is the diameter of the wire? (The resistivity of metal is 2.24
A piece of wire has a resistance R. It is cut into two pieces of equal length, and the pieces are twisted together parallel to each other. Part A What is the ratio of the resistance of the resulting wire to R?
Consider two pieces of copper wire that are the same length but A1 = 3A2. The same potential difference is maintained across each wire, V1 = V2. The resistivity of the wires is: a. the same and the current, 11 > 12. b. different and the current, l1 > 12. C. the same and the current, l1 < 12. d. different and the current, l1 < 12.
A wire of length 10 m is connected to a battery. If the diameter of the wire is 0.4 mm and the current flows is 5.0 A, what is the voltage across the battery?
7) A 4.0 m length of gold wire is connected to a 1.5 V battery, and a current of 4.0 mA flows through it. What is the diameter of the wire? (The resistivity of gold is 2.44 × 10-8 Ω·m.) A) 17 µm B) 8.5 µm C) 48 µm D) 9.0 µm
A nine-volt battery is connected to a thin wire (r=.0005 m, length = 1.50 m) of unknown metal. A current meter indicates that the current flowing is 3.14 A. a. What is the resistivity of the wire? b. How thick would the wire have to be (radius) in order for the same amount of current to flow (3.14 A) if the wire were 6.00 m long?
What voltage will produce 0.35 A of current through a 4800-Ω resistor? A 9.0-V battery is connected to a bulb whose resistance is 2.2 Ω How many electrons leave the battery per minute? What is the resistance of a 7.4-m length of copper wire 1.4 mm in diameter? The resistivity of copper is 1.68×10−8Ω⋅m A 12-V battery causes a current of 0.72 A through a resistor. What is its resistance? How many joules of energy does the battery lose in...
Two resistors are connected in series with a battery whose EMF is 35 V as shown in the figure below. The resistances of resistor 1 is R1=37 and of resistor 2 is R2 = 57 2. What is the value of the current flowing through the circuit? R1 E R2 In the figure below bulb B is brighter than bulb C which is brighter than bulb A. Rank the magnitudes of the potential differences (voltages) across the bulbs, largest first...