A light bulb designed for use with AC would still work if hooked up to DC of the proper voltage
Indicate whether the statement is true or false
T
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Torque: A flat circular loop of wire is in a uniform magnetic field of 0.30 T. The diameter of the loop is 1.0 m, and a 2.0-A current flows in it. What is the magnitude of the magnetic torque on the loop when the plane of the loop is parallel to the magnetic field?
A. 0.00 N ? m B. 0.41 N ? m C. 0.47 N ? m D. 0.52 N ? m
Total Internal Reflection: During the investigation of a new type of optical fiber having an index of refraction n = 1.21, a laser beam is aimed at the flat end of a straight fiber, as shown in the figure. What is the maximum angle of incidence ?1 if the beam is not to escape from the sides of the fiber if it is surrounded by air?
A. 42.9° B. 39.8° C. 36.7° D. 33.6° E. 30.5°
A pendulum bob of mass m is set into motion in a circular path in a horizontal plane as shown in the figure. The square of the angular momentum of the bob about the vertical axis through the point P is
A. m2gl3 sin4?/cos ? B. m2gl3 sin3?/cos ? C. m2gl3 sin2?/cos ? D. m2gl3 sin ?/cos ? E. m2gl3 sin2?
The law of conservation of angular momentum states that the angular momentum of an object remains constant if there are no external ______________ torques acting
Fill in the blank(s) with correct word