Which of the following statements are true? True False The rms-voltage is propor

Question

Which of the following statements are true?
True False  The rms-voltage is proportional to the maximum AC-voltage.
True False  In a circuit consisting of an AC voltage source and a resistor, the dissipated power is proportional to the resistance.
True False  In a circuit consisting of an AC voltage source and a resistor, the voltage drop across the resistor and the voltage source are in phase.
True False  In a circuit with a capacitor and inductance in series (no resistance), if the capacitor is initially charged, an un-damped harmonic oscillation takes place.

Explanation / Answer

1. Vrms = Vmax / sqrt(2)

so Vrms is directly propotional to Vmax.

True.

2. P(t) = V(t)^2 / R

here V(t) also changes with time.

False.

3. phase angle of circuit is 0.

so everything will be in phase.

True

4. True

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