When a current-carrying wire is bent into a loop, its magnetic field inside the loop
A) weakens.
B) becomes concentrated.
C) cancels.
D) none of the above
Answer: B
You might also like to view...
The diameter of the Sun is determined by measuring its ________ and ________.
A. mass; density B. distance; volume C. volume; density D. distance; angular size
What is the average translational kinetic energy per molecule of an ideal gas at a temperature of ? The Boltzmann constant is 1.38 × 10-23 J/K
A) 1.7 × 10-21 J B) 8.3 × 10-21 J C) 6.2 × 10-21 J D) 2.1 × 10-21 J E) 4.1 × 10-21 J
Almost all elements heavier than hydrogen and helium were made inside stars
Indicate whether the statement is true or false
A spaceship from another galaxy passes over the solar system directly above a radial line from the Sun to the Earth. (We measure that distance to be 1.5 × 1011 m.) On Earth, the spaceship is observed to be traveling at a speed of 0.80c, for which ? = 5/3. As measured on Earth it takes the spaceship 625 seconds to travel from the Sun to Earth. When a scientist in the spaceship measures the Earth-Sun distance and the time it takes her to travel that distance, she finds the results are, respectively
A. 9.0 × 1010 m; 375 s. B. 9.0 × 1010 m; 625 s. C. 1.5 × 1011 m; 625 s. D. 2.5 × 1011 m; 625 s. E. 2.5 × 1011 m; 1042 s.