Q4. A science project exhibit, a capacitor isconnected in series with a bulb connected to an ac
source. If its voltage amplitude is held constant, choose thecorrect option for the light bulb to
glow the brightest at (a) high frequencies (b) low frequencies (c)The brightness will be same at
all frequencies. At what frequency the light bulb will glow thedimmest, if capacitor is replaced by
inductor? When an AC source is replaced by DC source find outwhether the bulb will glow or
not in both cases? Justify your answer scientifically. In the abovecircuit 4.4 μF capacitor in series
with light bulb of resistance 1.5 kΩ connected to 240 V, 50 Hz? Howcan you evaluate the r.m.s
value of current through the entire circuit? Can you find theaverage power developed across
the entire circuit? When the capacitor is replaced by the inductorof 450 mH, how can you predict
the r.m.s current and average power in that circuit? In an LCRseries circuit, when capacitive
reactance and inductive reactance are equal then what would be ther.m.s current flowing in the
circuit? Prove this r.m.s current higher than r.m.s current in LRand CR circuits calculated in
above cases? Justify your answer.
