A proton is accelerated from rest through a potential difference of 150 V. It then enters a region of uniform magnetic field and moves in a circular path (radius = 12 cm). What is the magnitude of the magnetic field in this region?
a. 18 mT
b. 12 mT
c. 15 mT
d. 22 mT
e. 10 mT
C
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A series LC circuit contains a 100-mH inductor, a 36.0-mF capacitor and a 12-V battery. The period of the electromagnetic oscillations in the circuit is
A. 0.0227 s. B. 0.377 s. C. 2.26 s. D. 105 s. E. 1750 s.
Monochromatic light is incident on a diffraction grating that is 75 mm wide and ruled with 50,000 lines. The second-order maximum is seen at 32.5°. What is the wavelength of the incident light?
A) 202 nm B) 403 nm C) 605 nm D) 806 nm
Object A has a charge q on it, object B has a charge q on it, and object C has a charge 2q on it. These charges are arranged, one each, at the vertices of an equilateral triangle. Which charge has the greatest magnitude electric force on it?
a. A b. C c. B d. All have equal magnitude forces on them.
What is the quantum number n of a particle of mass m confined to a one-dimensional box of length L when its momentum is 4h/L?
a. 1 b. 4 c. 2 d. 8 e. 16