1. Which statement is FALSE? A) When applying Ohm’s law to AC RLC circuits the i
ID: 1455109 • Letter: 1
Question
1. Which statement is FALSE?
A) When applying Ohm’s law to AC RLC circuits the impedance takes the place of current.
B) The rms current Irms in an AC circuit is related to the maximum value of current Imax by Irms= Imax / sqroot. 2
C) Ampere’s law relates moving charges to magnetic fields.
D) The kWh is a unit of energy.
2. Consider an oscillating LC circuit. The energy in the capacitor is stored in the _____________. The energy in the inductor is stored in the ______________.
A) battery, battery
B) electric field, magnetic field
C) electric field, electric field
D) magnetic field, electric field
3. Why does a transformer require alternating current?
A) Direct current would be too strong for the transformer.
B) The current must reach resonance in order for the transformer to work.
C) Direct currents are only used to transmit electric power over long distance.
D) A changing current produces a changing magnetic field which can produce a current.
E) None of the above
Explanation / Answer
1.(A)False
(B)True
(C)True
(D)True
2.
Consider an oscillating LC circuit. The energy in the capacitor is stored in the electric field. The energy in the inductor is stored in the magnetic field
3. Why does a transformer require alternating current?
D) A changing current produces a changing magnetic field which can produce a current
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