Strictly speaking, it is correct to say that
A) charge flows through a circuit.
B) voltage flows through a circuit.
C) resistance is established across a circuit.
D) current causes voltage.
E) all of these
Answer: A
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Which of the following isotopes is radioactive?
A) Carbon-12 B) Carbon-14 C) both of these D) neither of these
A parallel-plate capacitor has dimensions 4.3 cm × 4.6 cm. The plates are separated by a 1.0-mm thickness of paper (dielectric constant ? = 3.7). What is the charge that can be stored on this capacitor, when connected to a 1.2-V battery? (?0 = 8.85 × 10^?12 C2/N?m2)
a. 2.0 × 10^?12 C b. 3.9 × 10^?12 C c. 3.9 × 10^?11 C d. 7.8 × 10^?11 C e. 6.8 × 10^?11 C
The Roche limit is the:
A) distance from the Sun within which a planet cannot retain or create an atmosphere. B) minimum distance between a planet and a satellite that can hold itself together by its own gravity. C) minimum mass required by an object in the Solar System to be classified as a planet instead of a star. D) distance from Earth at which radio communication with a satellite is lost.
Relativity dealing with gravitation is known as:
a. gravitational relativity. c. general relativity. b. Galilean relativity. d. inertial relativity.