A current-carrying loop of wire experiences no tendency to rotate in a magnetic field when
A) field lines pass directly through the loop.
B) no field lines pass through the loop.
C) none of these
Answer: B
You might also like to view...
Snell's Law: A thin laser beam traveling in air strikes the surface of a glass plate at 41.2° with the normal. In the plate, this beam makes an angle of 22.4° with the normal. What is the speed of light in this glass? (c = 3.0 × 108 m/s)
Fill in the blank(s) with the appropriate word(s).
Sound: A plucked guitar string produces a sound wave of frequency 0.44 kHz on a day when the speed of sound is 340 m/s.(a) What is the wavelength of the sound wave?(b) How much time elapses between the impacts of two adjacent compressions of the sound wave on your eardrum?
What will be an ideal response?
A planet whose distance from the Sun is 3 AU would have an orbital period of how many Earth-years?
A) 3 B) C) D) 9 E) 81
A 30-?F capacitor is charged to 40 V and then connected across an initially uncharged 20-?F capacitor. What is the final potential difference across the 30-?F capacitor?
a. 15 V b. 24 V c. 18 V d. 21 V e. 40 V