# What is the formula for instantaneous power?

## What is the formula for instantaneous power?

P = V x I

For a DC circuit, the instantaneous power equation is quite simple and it’s represented by the following equation: P = V x I.

**What is the formula for power dissipation?**

If a current I flows through through a given element in your circuit, losing voltage V in the process, then the power dissipated by that circuit element is the product of that current and voltage: P = I × V.

**How do you calculate voltage dissipation?**

Divide the voltage by the total resistance to get the total current in a series circuit. In a series circuit, the same current flows through each resistor. Multiply the square of the current with the individual resistances to get the power dissipated by each resistor.

### What is instantaneous power in AC circuit?

The instantaneous power is the power at a given instant. The average power is the power averaged over a cycle or number of cycles. The average ac current delivered to a circuit is zero. Despite this, power is dissipated in the circuit.

**How do you find instantaneous power in an AC circuit?**

Instantaneous Power As in DC circuits, the instantaneous electric power in an AC circuit is given by P=VI where V and I are the instantaneous voltage and current. the power becomes: Averaging this power over a complete cycle gives the average power.

**What is instantaneous voltage and current?**

An instantaneous value of voltage or current is the induced voltage or current flowing at any instant during a cycle. The sine wave represents a series of these values.

#### What is power dissipation in a circuit?

Any resistor in a circuit that has a voltage drop across it dissipates electrical power. This electrical power is converted into heat energy hence all resistors have a power rating. This is the maximum power that can be dissipated from the resistor without it burning out.

**Is voltage drop same as power dissipation?**

There is a voltage drop across the load. So we can calculate the power dissipated by the load by using the formula P=(Voltage drop)*(current). Let us increase the resistance of the load by keeping other circuit elements fixed. Then there is a larger voltage drop across the load and smaller current in the circuit.

**What is instantaneous current and voltage?**

The instantaneous value of an alternating voltage or current is the value of voltage and current at a particular instance of time.

## At what value of V is the instantaneous power a maximum?

When the power is instantaneously at its maximum value, the voltage and the current have instantaneous values of V m / 2 and I m / 2 . Maximum instantaneous power = V M √ 2 × I M √ 2 = V M I M √ 2 Average value of power = 2 π × V M I M 2 .

**What is instantaneous power factor?**

Instantaneous Power, p=v×i. Since, the values of instantaneous voltage and instantaneous current changes from instant to instant, thus the instantaneous power changes with time. The instantaneous power (p) is measured in watts. The instantaneous power may be positive or negative.

**What is instantaneous voltage?**

Instantaneous Voltage. The EMF induced in the coil at any instant of time depends upon the rate or speed at which the coil cuts the lines of magnetic flux between the poles and this is dependant upon the angle of rotation, Theta ( θ ) of the generating device.

### What is meant by instantaneous voltage?

An instantaneous value of voltage or current is the induced voltage or current flowing at any instant during a cycle.