Three wires of lengths 3m, 4m and 5m are made up of the same material and have the same area of cross section, which wire has the highest resistance? O a. All three wires have the same resistance O b. 3m long wire Oc. 5m long wire O d. 4m long wire

The resistance between terminals a and b in Figure P18.13 is 75 . If the resistors labeled R have the same value, determine R. Figure P18.13

When the cross-sectional area of a conducting wire is doubled while its length is cut in half, the resistance of the wire will be __________ .   a. three time sits original value.   b. one-third of its original value.   c. the same as before.   d. one-fourth of its original value.   e. four times its original value.

5 - A wire of length L and radius r has a resistance R. What is the resistance of a second wire made from the same material that has a length L/2 and a radius r/2? a) R/2 b) 2R 200206 c) R d) 4R e) R/4 Boş bırak Könceki 5/20 Sonraki>

IN 77. If electric power is transmitted over long distances, the resistance of the wires becomes significant. Why? Which method of transmission would result in less they ofte wires. W F6 84. (a) energy wasted-high current and low voltage or low current and high voltage? Explain your answer. resistane V and b i potentia V is ap 78. The ideal batteries have emfs 12 V and %3D 6.0 V. What are (a) the current current, the dissipation rate in (b) resistor 1 (4.0 2) and (c) resistor 2 (8.0 2), and the energy transfer rate in (d) battery 1 and (e) battery 2? Is energy being supplied or absorbed by (f) battery 1 and (g) battery 2? 79. Consider 85. A series, a applied capacit 4F constar 10.0 2 25.0 V capacit the circuit shown. Find (a) 10.0 2 86. Cc the current the 20.0-2 resistor and (b) potential difference between points a and b. the 20.0 2 75 00'S 80. An automobile battery has an emf of 12.6 V and an internal resistance of 0.0800 2. The headlights together present equivalent resistance 5.00…

If the length of a cylindrical conducting wire doubles and its radius also doubles, then the resistance of the wire __________. a. halves b. decreases by a factor of two c. doubles d. increases by a factor of four e. does not change

A certain wire has resistance R. Another wire of the same material has half the length and half the diameter of the first wire. The resistance of the second wire is: a) R/4 b) R/2 c) 2R d) 4R e) R

A uniform conductor of length Į and cross-sectional area A. When the cross-sectional area decreases, its resistance O a. increases O b. decreases O. remains constant d. may increase or decrease

A certain wire has a resistance R.What is the resistance of a second wire, made of the same material, that is half as long and has half the diameter?

A metal wire of resistance R is cut into two pieces of equal length. The two pieces are connected together side by side.What is the resistance of the two connected wires?A. R/4        B. R/2       C. R         D. 2R         E. 4R