A positive ion has more
A) electrons than neutrons.
B) electrons than protons.
C) protons than electrons.
D) protons than neutrons.
E) neutrons than protons.
Answer: C
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Series/Parallel Circuits: If V = 40 V and the battery is ideal, what is the potential difference across R1 in the figure?
A. 6.7 V B. 8.0 V C. 10 V D. 20 V
Alternating current and voltage (AC), rather than direct current and voltage (DC), are used for domestic electrical power. The reason for this is based on one of the following physical principles. Which one?
A) When a current flows through a resistance, heat is generated. B) When a current flows through a wire, a magnetic field is created. C) When the number of magnetic field lines passing through a circuit changes, a voltage is generated in the circuit. D) When a current-carrying wire is placed in a magnetic field, it may experience a force if properly oriented. E) Opposite electric charges attract each other, and like charges repel each other.
When a nucleus in an excited state decays to the ground state, the particle emitted is
a. an alpha particle. b. a beta particle. c. a gamma ray. d. an x-ray. e. none of the above.
Convert 14°F to K
A) 263 K B) 287 K C) 163 K D) -10 K E) 474 K