Suppose that an object is moving with constant nonzero acceleration. Which of the following is an accurate statement concerning its motion?
A) In equal times its speed changes by equal amounts.
B) In equal times its velocity changes by equal amounts.
C) In equal times it moves equal distances.
D) A graph of its position as a function of time has a constant slope.
E) A graph of its velocity as a function of time is a horizontal line.
Answer: B
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The circuit below contains three resistors, A, B, and C, which all have equal resistances. The emf ? = 110V. Which resistor generates the most thermal energy after the switch is closed?
A. A B. B C. C D. A and B E. All three generate equal amounts of thermal energy.
A 4.0-cm-tall object is placed 50.0 cm from a diverging lens having a focal length of magnitude 25.0 cm. What is the nature and location of the image?
A) a real image, 4.0 cm tall, 20 cm other side of the object B) a virtual image, 4.0 cm tall, 20 cm other side of the object C) a virtual image, 2.0 cm tall, 10 cm other side of the object D) a virtual image, 1.3 cm tall, 16.7 cm same side as the object E) a real image, 1.3 cm tall, 16.7 cm same side as the object
A hollow cylindrical (inner radius = 2.0 mm, outer radius = 4.0 mm) conductor carries a current of 24 A parallel to its axis. This current is uniformly distributed over a cross section of the conductor. Determine the magnitude of the magnetic field at a point that is 5.0 mm from the axis of the conductor
a. 0.96 mT b. 1.7 mT c. 0.55 mT d. 1.2 mT e. 0.40 mT
A charge -q is far away from a charge -Q which is fixed in place. As -q moves closer to -Q, the work done by the electric field is
A. positive. B. negative. C. zero.