An AC voltage source of variable angular frequency `(omega)` and fixed amplitude `V_(0)` is connected in series with a capacitance C and an electric bulb of resistance R (inductance zero). When `(omega)` is increased

Options

A. The bulb glows dimmer
B. The bulb glows brighter
C. Total impendance of the circuits is unchanged
D. Total impendance of the circuit increases

Answer

2

Explanation

In `R -C` circuit, the impedance is
`Z = sqrt(R^(2) + (1)/(omega^(2) + C^(2)))`,
As `omega` increases, `Z` decreases.
Since, Power `alpha (1)/("impedance")`, therefore the bulb glows brighter.