Consider two (1 and 2) tungsten wires both of which have constant circular cross sectional areas...
Two copper wires have the same length but different cross sectional areas. The cross-sectional area of wire 1 is A, and that of wire 2 is 2A. How are the resistances of the two wires related? Choose the correct answer from the following choices. Wire 1 has four times the resistance of Wire 2 Wire 1 has half the resistance of Wire 2 The are the same. Wire 1 has twice the resistance of Wire 2
Six copper wires have the lengths and cross-sectional areas listed below. The resistance R of each segment can be calculated using, R = pL/ A Where p is the resistivity, L is the length of the wire, and A is the wire's cross-sectional area. Rank the resistances of the wires from lowest to highest.
Four copper wires of equal lengths are connected in series. Their cross sectional areas are 1.00cm², 2.00cm², 3.00cm² and 5.00cm². If the voltage of 120V is applied to the arrangement, what is the voltage across the 2.00cm² wire? NB: length of wires could be anything but the length is the same
23. Two wires A and B with circular cross sections are made of the same metal and have equal lengths, but the resistance of wire A is three times greater than that of wire B. What is the ratio of the cross- sectional area of A to that of B? a. 3 b. 13 c. 1 d. 1/13 e. 1/3 24. A potential difference of 1.0 V is maintained across a 10.0-V resistor for a period of 20 s. What...
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...
[VI] The figure shows three wires, made of the same material, with their cross-sectional areas and lengths. The resistance of each wire is as labeled in the figure. Which of the following statements is correct? L 1.5L L/2 AR A/2 R A/2 O Ri=R2 = R3 OR] >R2>R3 OR1 = R2>R3 OR2>R1 = R3
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 square wires are composed differently, see the figure of their cross-sections. Wire 1 is a square wire of material A but with a circular center of material C. The diameter of the circular inside is equal to the length of side of the square. The second square wire has the same cross-sectional area as the first but is entirely comprised of material A. Both wires are the same length and setup to have the same temperature difference maintained between...
A copper wire of cross-sectional area of 8.2x10^-7 m^2 has a resistance of 1.11 Ω. a). How long is the wire? b). If a potential of 12.0 V is applied across the ends of the wire, what current will flow through the wire? c). How much electrical power is supplied to the spool? d). How many electrons (N) pass through this wire in 1.00 minutes?
6. a) Two different wires (materials 1 & 2) have lengths 1 and 2 and associated diameters di and If the resistance R of the wires is to be the same show the relationship between their diameters is given by dz =d, P2h VPL b) Using the above result, determine the diameter of a nichrome wire (p=96 x 10 - Qm) of length 4 mifit is to have the same resistance has a copper wire (p=1.72 x 10- m) whose...