An insulated wire of diameter 1.0 mm and negligible resistance is wrapped tightly around a cylindrical core of radius 5.0 cm and length 30 cm to build a solenoid
What is the energy stored in this solenoid when a current I = 0.20 A flows through it? (?0 = 4? × 10-7 T ? m/A)
A) 1.2 × 10-4 J
B) 9.6 × 10-4 J
C) 4.8 × 10-4 J
D) 2.4 × 10-4 J
E) 5.9 × 10-5 J
E
You might also like to view...
All of the following have occurred over long periods of time on Earth. Which one is not thought to have played a major role in long-term changes in Earth's climate?
A) changes in the Earth's axis tilt B) changes in the Earth's overall reflectivity C) a gradual rise in the atmospheric content of oxygen D) changes in the atmospheric concentration of greenhouse gases
Which of the following gases, which we might be able to detect in infrared spectra, would be a strong indicator of life on another planet?
A) carbon dioxide B) ozone C) methane D) water vapor E) sulfuric acid
In this figure, 10 calories of heat are added to each of the two samples of the same gas. Why is T1 greater than T2?
a. There are fewer atoms or molecules in the smaller object, so each atom (molecule) must move more vigorously for a given amount of heat (energy) transferred to the material. b. The thermometer is able to absorb heat from the smaller object more rapidly. c. This follows from the ideal gas law.
A hydrogen atom initially in the n = 6 state decays to the n = 2 state. The emitted photon is detected in a photographic plate. What is the wavelength of the detected photon?
The lowest level energy state of hydrogen is -13.6 eV. (h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J, c = 3.00 × 108 m/s) A) 1090 nm B) 93.1 nm C) 410 nm D) 93.8 nm