A light bulb is rated at \(100~\text W\) for a \(220~\text V\) AC supply. The peak voltage of the source is:

A light bulb is rated at \(100~\text{W}\) for a \(220~\text{V}\) AC supply. The RMS current through the bulb is:
1. \(0.243\) A
2. \(0.454\) A
3. \(0.222\) A
4. \(0.312\) A

A pure inductor of \(25.0~\text{mH}\) is connected to an AC source of \(220~\text{V}\). The RMS current in the circuit is:
(The frequency of the source is \(50~\text{Hz}\))
1. \(20~\text{A}\)
2. \(25~\text{A}\)
3. \(28~\text{A}\)
4. \(32~\text{A}\)

A lamp is connected in series with a capacitor. Predict your observations for dc and ac connections:

A \(15.0~\mathrm{\mu F}\) capacitor is connected to a \(220~\mathrm{V}\), \(50~\mathrm{Hz}\) source. If the frequency is doubled, what happens to the capacitive reactance and the current?

A light bulb and an open coil inductor are connected to an ac source through a key as shown in the figure.

The switch is closed and after some time, an iron rod is inserted into the interior of the inductor. The glow of the light bulb:

1. increases

2. decreases

3. is unchanged, as the iron rod is inserted 

4. first increases and then decreases

A resistor of \(200~\mathrm{\Omega}\) and a capacitor of \(15.0~\mu\text{F}\) are connected in series to a \(220~\text{V}\), \(50\) Hz AC source. The voltage (RMS) across the resistor and the capacitor are respectively:
1. \( 160.3 ~\text{V}, 160.3 ~\text{V} \)
2. \( 151 ~\text{V}, 151 ~\text{V} \)
3. \( 160.3 ~\text{V}, 151 ~\text{V} \)
4. \( 151 ~\text{V}, 160.3 ~\text{V}\)

Which one of the following is incorrect?

A sinusoidal voltage of peak value \(283 ~\text V\) and a frequency \(50~\text{Hz}\) is applied to a series LCR circuit in which \(R = 3~\Omega,\) \(L = 25.48 ~\text{mH},\) and \(C = 796~\mu\text F.\) The impedance of the circuit is:

1. \(5 ~\Omega\)$$
2. \(8 ~\Omega\)$$
3. \(4 ~\Omega\)$$
4. \(2~\Omega\)$$