Why capacitor voltage does not change instantaneously?

If the voltage changes instantly from one value to another (i.e. discontinuously), the derivative is not finite. This implies that an infinite current would be required to instantly change the voltage. Since an infinite current is not physically realizable, that means that the voltage cannot change instantaneously.

Can capacitor voltage 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 current Cannot change instantaneously in an inductor?

The current in an inductor cannot change instantaneously because it implies an infinite voltage will exist, which isn’t going to happen. This reluctance to change is because of the energy stored in the inductor’s magnetic field. The current in an inductor does not (will not) change instantaneously.

Can the energy stored in a capacitor change instantaneously Why or why not?

When a voltage source (v) is connected the a capacitor, the amount of charge stored (q) is directly proportional to the applied voltage: Cv q = , where C, the constant, is the capacitance of the capacitor. (c) However, the current through a capacitor can change instantaneously.

Does capacitor allow sudden change in current?

Capacitor does not allow sudden change of voltage and it stores energy in the form of the electric field. (Capacitor allows sudden change of current).

Which does not allow sudden change in current?

The inductor does not allow sudden changes in current because if current changes in the inductor occur in zero time, the voltage becomes zero which is not possible.

What is the voltage across the inductor at t 0?

As soon as the switch is closed at t=0+, the inductor acts as an open circuit, hence the current in the circuit is zero. Since the current in the circuit is zero, there is no voltage drop across the resistor and hence voltage across the inductor is equal to the supply voltage, i.e. 60V.

Can the current through a capacitor change abruptly?

Current through a capacitor cannot change abruptly.

Is voltage constant across a capacitor?

When you first apply a voltage across a capacitor, assuming the capacitor is discharged, it acts as a short, and thus will show 0 volts across it. However, depending on the value of R and C, the capacitor will eventually charge, and when it is “full” it will not allow any current to pass.

Is it possible to change the energy of a capacitor instantaneously?

It is physically impossible to instantaneously change the energy associated with these components. When we close the switch at time = 0, the voltage on the initially uncharged capacitor increases. With an ideal capacitor, the final voltage is equal to the battery voltage.

Can the voltage across a capacitor be infinite?

If capacitance is non-zero, then current must be infinity. Since there is no perfect voltage source, or no resistor or wire with perfect zero ohms, then it is impossible to have an infinite current, so it is impossible for the voltage across a capacitor to change instantaneously. Home Science Math and Arithmetic

How do you increase the voltage across a capacitor?

The voltage across a capacitor is proportional to the charge on the capacitor plates. Hence to change the voltage you need to add or remove charge. To change the charge instananeosly you will need infinite current.

Is it possible to change voltage instantly?

This implies that an infinite current would be required to instantly change the voltage. Since an infinite current is not physically realizable, that means that the voltage cannot change instantaneously. Share Cite Improve this answer