A light bulb is rated at \(100\) W for a \(220\) V AC supply. The peak voltage of the source is:
1. | \(220\) V | 2. | \(110\) V |
3. | \(311\) V | 4. | \(100\) V |
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. \(32~\text{A}\)
Which one of the following is incorrect?
1. | For circuits used for transporting electric power, a low power factor implies large power loss in transmission. |
2. | Power factor can often be improved by the use of a capacitor of appropriate capacitance in the circuit. |
3. | For circuits used for transporting electric power, a low power factor implies low power loss in transmission. |
4. | Both (1) and (2) |