Question

Q4. A science project exhibit, a capacitor is connected in series with a bulb connected to an ac source. If its voltage amplitude is held constant, choose the correct 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 the dimmest, if capacitor is replaced by inductor? When an AC source is replaced by DC source find out whether the bulb will glow or not in both cases? Justify your answer scientifically. In the above circuit 4.4 μF capacitor in series with light bulb of resistance 1.5 kΩ connected to 240 V, 50 Hz? How can you evaluate the r.m.s value of current through the entire circuit? Can you find the average power developed across the entire circuit? When the capacitor is replaced by the inductor of 450 mH, how can you predict the r.m.s current and average power in that circuit? In an LCR series circuit, when capacitive reactance and inductive reactance are equal then what would be the r.m.s current flowing in the circuit? Prove this r.m.s current higher than r.m.s current in LR and CR circuits calculated in above cases? Justify your answer..

Answer 1