Kirchhoff's Rules: In the circuit shown in the figure, R1 = 60 ?, R2 = 120 ?, R3 = 180 ?, V1 = 3.0 V, V2 = 6.0 V, and the batteries are both ideal. What is the current through R1?
A. 0.050 A
B. 0.030 A
C. 0.00 A
D. 2.68 A
Answer: A
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Lenz's Law: The wire in the figure carries a current I that is decreasing with time at a constant rate. The wire and the three loops are all in the same plane. What is true about the currents induced in each of the three loops shown?
A. No current is induced in any loop. B. The currents are counterclockwise in all three loops. C. The currents are clockwise in all three loops. D. Loop A has clockwise current, loop B has no induced current, and loop C has counterclockwise current. E. Loop A has counterclockwise current, loop B has no induced current, and loop C has clockwise current.
The position of an object is given by x = at3 – bt2 + ct, where a = 4.1 m/s3, b = 2.2 m/s2, c = 1.7 m/s, and x and t are in SI units. What is the instantaneous acceleration of the object when t = 0.7 s?
A) -13 m/s2 B) 2.9 m/s2 C) 4.6 m/s2 D) 13 m/s2
What is meant by thermal resistance at a surface?
What will be an ideal response?
The ____ is 18 years and 11 days long
a. sidereal period b. synodic period c. eclipse season d. Saros cycle e. eclipse year