Rank the magnitudes of the following magnetic fields from largest to smallest, noting any cases of equality
(a) the field 2 cm away from a long, straight wire carrying a current of 3 A
(b) the field at the center of a flat, compact, circular coil, 2 cm in radius, with 10 turns, carrying a current of 0.3 A
(c) the field at the center of a solenoid 2 cm in radius and 200 cm long, with 1 000 turns, carrying a current of 0.3 A
(d) the field at the center of a long, straight, metal bar, 2 cm in radius, carrying a current of 300 A
(e) a field of 1 mT
1.a > e > b > d > c
2.e > d > b > c > a
3.e > c > b > a > d
4.e > c > b > a > d
5.b > c > d > a > e
4
You might also like to view...
Which technique is best for measuring the distances of nearby galaxies?
What will be an ideal response?
Suppose you are looking at the sky at about midnight on the December solstice. Based on the given right ascensions and declinations, which of the following stars will be nearest to your meridian? Assume you live at a latitude where all the stars on this list rise above your horizon each day. (Hint: Recall that the Sun's celestial coordinates on the December solstice are RA = 18h, dec = -23-1/2°.)
A) Spica: RA = 13hr 25m, dec = -11°09' B) Deneb: RA = 20hr 41m, dec = +45°16' C) Sirius: RA = 6hr 45m, dec = -16°42' D) Alpha Centauri: RA = 14hr 40m, dec = -60°50' E) Vega: RA = 18hr 37m, dec = +38°47'
The first confirmed detections of extrasolar planets occurred in
A) the 1990s. B) the mid-17th century. C) the 1920s. D) 2009.
A 40.0 cm long organ pipe is filled with air and is open at both ends. The velocity of sound in air at 0
is 331 m/s. If the temperature of the air decreases by 10
then what is the frequency of the fundamental mode?
A. 394 Hz B. 406 Hz C. 462 Hz D. 506 Hz E. 544 Hz