1. Generators that were used in the past to supply electricity in automobiles ha
ID: 1267429 • Letter: 1
Question
1. Generators that were used in the past to supply electricity in automobiles have been replaced by
A) armatures. B) dynamos. C) batteries. D) alternators. E) commutators.
2. In a series LRC circuit, Kirchhoff's loop rule
A) would be obeyed but the currents are not in phase.
B) would be obeyed but the currents and voltages are not in phase.
C) is not obeyed.
D) would be obeyed but the voltages are not in phase.
E) is obeyed.
3. A resistor and an inductor are connected in series to a battery. The time constant for the
circuit represents the time required for the current to reach
A) 37% of the maximum current.
B) 75% of the maximum current.
C) 63% of the maximum current.
D) 50% of the original value.
E) 25% of the maximum current.
4. An electromagnetic wave with components Ey = Eo sin(kx - ?t) and Bz = Bo sin(kx - ?t) is a
wave with a frequency of
A) 3?/2?. B) ?. C) k. D) ?/?. E) k/?.
5. The average magnetic energy density of an electromagnetic wave is 8.95
Explanation / Answer
1. Generators that were used in the past to supply electricity in automobiles have been replaced by
A) armatures. B) dynamos. C) batteries. D) alternators. E) commutators.
2. In a series LRC circuit, Kirchhoff's loop rule
A) would be obeyed but the currents are not in phase.
B) would be obeyed but the currents and voltages are not in phase.
C) is not obeyed.
D) would be obeyed but the voltages are not in phase.
E) is obeyed.
3. A resistor and an inductor are connected in series to a battery. The time constant for the
circuit represents the time required for the current to reach
A) 37% of the maximum current.
B) 75% of the maximum current.
C) 63% of the maximum current.
D) 50% of the original value.
E) 25% of the maximum current.
4. An electromagnetic wave with components Ey = Eo sin(kx - ?t) and Bz = Bo sin(kx - ?t) is a
wave with a frequency of
A) 3?/2?. B) ?. C) k. D) ?/?. E) k/?.
5. The average magnetic energy density of an electromagnetic wave is 8.95
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.