Why does voltage increase across a capacitor?

A capacitor has an even electric field between the plates of strength E (units: force per coulomb). So the voltage is going to be E×distance between the plates. Therefore increasing the distance increases the voltage.

Can the voltage drop across the inductor or capacitor be more than the applied voltage of source?

Yes, the voltages dros the inductor or the capacitor in a series circuit can be greater than the applied voltage are not in phase and they cannot be added like ordinary numbers.

Does voltage change across a capacitor?

A capacitor opposes changes in voltage. If you increase the voltage across a capacitor, it responds by drawing current as it charges. In doing so, it will tend to drag down the supply voltage, back towards what it was previously. That’s assuming that your voltage source has a non-zero internal resistance.

Can voltage across a capacitor change instantaneously?

Capacitors and inductors store electrical energy—capacitors in an electric field, inductors in a magnetic field. This isn’t physically possible, so a capacitor’s voltage can’t change instantaneously.

Why does a capacitor charge up when a switch is closed?

This charges up the capacitor. The voltage on the cap rises as the first quadrant of a sine with the original voltage added. Eventually the backwards voltage across the inductor causes the inductor current to go to zero. At that point, all the energy originally in the inductor when the switch closed has been transferred to the capacitor.

What happens when a capacitor is connected in series with resistor?

I am confused by this question. If we connect a resistor in series to capacitor then the voltage will drop across the resistor and now voltage across the capacitor is less than the source, then why would capacitor charge till it has volts equal to the source?

What happens if there is no voltage across the resistor?

If there’s no voltage across the resistor, then all the voltage must be across the capacitor. So the battery and capacitor voltages must be the same. When you add the second resistor, there’s always a current flowing through R1 and then through R2, even when the capacitor is charged.

How does an inductor increase the voltage of a capacitor?

In fact, this is the basis of a circuit known as a boost converter, whose job is to make a higher voltage from a lower one. Consider all currents zero at start, with the capacitor voltage V1. When the switch closes, a constant voltage is applied to the inductor, so current increases linearly thru the inductor.