In general, an insulator will have a low resistance to current flow
a. True
b. False
Indicate whether the statement is true or false
False
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The Northern Hemisphere is warmer in its summer months because ________.
A. Earth is closer to the Sun during this time and the Sun is in the sky for a longer period of time B. Earth is closer to the Sun during this time C. the Sun is in the sky for a longer period of time and the Sun is more directly overhead during this time D. the Sun is more directly overhead during this time E. the Sun is in the sky for a longer period of time
Significant Figures: What is 0.2052/3, to the correct number of significant figures?
A. 0.348 B. 0.35 C. 0.3 D. 0.3477
A sewing machine needle moves up and down in simple harmonic motion with an amplitude of 1.27 cm and a frequency of 2.55 Hz. What is the maximum speed of the needle?
A) 3.18 cm/s B) 4.51 cm/s C) 20.3 cm/s D) 10.1 cm/s E) 6.36 cm/s
Lenz's Law: A circular coil of copper wire is lying flat on a horizontal table. A bar magnet is held above the center of the coil with its south pole downward. The magnet is released from rest and falls toward the coil. As viewed from above, what is the direction of the current induced in the coil as the magnet approaches the coil?
A. counterclockwise B. clockwise C. No current is induced in the coil. D. An emf but no current is induced in the coil.