Electric charge will flow in an electric circuit when
A) electric resistance is low.
B) a potential difference exists.
C) the circuit is grounded.
D) electric devices in the circuit are not defective.
Answer: B
You might also like to view...
Why is the core hot?
A. from both the decay of radioactive atoms and the leftover heat B. from heat left over from the planet's birth C. The high pressure in the core drives the temperature higher. D. from the steady decay of radioactive atoms in the rock E. None of these choices are correct.
Planetary rings are
A) composed of a large number of individual particles that orbit their planet in accord with Kepler's third law. B) orbiting in the equatorial plane of their planet. C) known to exist for all of the jovian planets. D) all of the above
A circular coil lies flat on a horizontal surface. A bar magnet is held fixed above the center of the coil with its north pole pointing downward. What is the direction of the induced current in the coil, as viewed from above?
A) clockwise B) counterclockwise C) There is no current in the coil.
Doubling the distance between sound source and a listener will change the intensity, as detected by the listener, by what factor?
a. 4 c. 1/2 b. 2 d. 1/4