A 14.0-V battery is connected in series with a switch, 5.0-? resistor and coil. What energy is stored in the coil when the current is 2.8 A? The time constant is 4.8 × 10^?4 s
a. 9.4E–3 J
b. 1.9E–2 J
c. 6.7E–3 J
d. 3.8E–3 J
e. 1.2E–3 J
a
You might also like to view...
Star clusters are important to our study of the lives of high-mass versus low-mass stars because
a. stars in each cluster all formed at about the same time all with the same mass. b. the Sun was once a member of a globular cluster. c. stars in each cluster all formed at about the same time but with differing masses. d. stars in each cluster all formed at different times with differing masses. e. All of the other choices are correct.
In the figure, a very small toy race car of mass m is released from rest on the loop-the-loop track. If it is released at a height 2R above the floor, how high is it above the floor when it leaves the track, neglecting friction?
A) 1.67 R B) 2.00 R C) 1.50 R D) 1.33 R E) 1.25 R
Which of the following statements about ozone (in Earth's stratosphere) is not true?
A) The presence of ozone was crucial to the origin of life. B) If the ozone layer is depleted, we can expect the rate of mutations in land-based life-forms to increase significantly. C) Ozone absorbs ultraviolet light from the Sun. D) The ozone hole occurring each spring over Antarctica appears to be caused by human-made CFCs.
If air resistance can be ignored, which of the following graphs will be a straight line for a falling object?
A. Distance travelled versus velocity B. Velocity versus time C. Velocity versus distance travelled D. Distance travelled versus time E. Time versus distance travelled