The source of electrons in a simple electric circuit is
A) the voltage source.
B) energy stored in the voltage source.
C) energy released by the voltage source.
D) the electrical circuit itself.
E) none of the above
Answer: D
You might also like to view...
Conservation of Momentum: Two friends are standing on opposite ends of a canoe that is initially at rest with respect to a frictionless lake. The person in the front throws a very massive ball toward the back, and the person in the back catches it. After the ball is caught, the canoe is
A. moving backward. B. stationary. C. moving forward.
If every star had an Earth-like planet in an Earth-like orbit, how many could be detected by a transit?
A) 1 in 2 B) 1 in 20 C) 1 in 200 D) 1 in 2,000 E) 1 in 20,000
Which of the following is considered by biologists to be a likely place where life might have first arisen on Earth?
A) on land surfaces that got moderately heavy rainfall B) in hot water near undersea volcanoes C) deep in Earth's core D) on meteorites that landed on Earth
An alpha particle is moving at a speed of 5 × 105 m/s in a direction perpendicular to a uniform magnetic field of strength 4 × 10-2 T
The charge on an alpha particle is 3.2 × 10-19 C and its mass is 6.6 × 10-27 kg. (a) As the alpha particle moves, its velocity is directed (b) The magnitude of the force on the alpha particle is