Two wires, each having a weight per unit length of 1.0 × 10^?4 N/m, are strung parallel, one 0.10 m above the other. If the wires carry the same current, though in opposite directions, how great must the current in each wire be for the magnetic field of the lower conductor to balance the weight of the upper conductor?
7.1 A
Physics & Space Science
You might also like to view...
Which is an asterism of Pegasus?
a. Great Square b. Orion c. Andromeda d. Scorpio e. Cassiopeia
Physics & Space Science
Electric potential and electric potential energy are
A) one and the same in most cases B) Two terms for the same concept C) Both A & B D) None of these
Physics & Space Science
Of the following gases, which is the most important contributor to the Earth's greenhouse effect?
a. water vapor b. ozone c. CFCs d. methane
Physics & Space Science
An 100-g piece of copper, initially at 295°C, is dropped into 250 g of water contained in a 300-g aluminum calorimeter; the water and calorimeter are initially at 10.0°C. What is the final temperature of the system? (Specific heats of copper and aluminum are 0.0920 and 0.215 cal/g•°C, respectively. cw = 1.00 cal/g•°C)
a. 12.8°C c. 18.1°C b. 16.5°C d. 32.1°C
Physics & Space Science