What is the relationship between the impedance in an AC circuit and resistance in a DC circuit?

Impedance- The main difference between Resistance and Impedance is their behavior to AC and DC currents. While resistance controls the flow of AC and DC current, Impedance just determines the alternative current flow. It means that impedance is only used in AC systems and does not have any use in DC diagrams.

Why does AC voltage applied across a load resistance produce alternating current in the circuit?

When a constant voltage source or battery is applied across a resistor current is developed in resister. This current has a unique direction and flows from the negative terminal of a battery to positive terminal. The magnitude of the current remains constant as well.

What is the difference between DC resistance and AC impedance?

It is important to understand that reactance is the resistance offered to the AC current by inductors and capacitors only while impedance is the sum of the resistance and reactance….

Difference Between Resistance and Impedance
It is used in DC circuits	It is used in AC circuits

Why does AC current not see the same level of resistance as DC?

For a given conductor AC resistance is more than its DC resistance. This is because an alternating current flowing through a conductor does not distribute uniformly but tends to concentrate near the surface of the conductor.

How does impedance affect current?

Impedance reduces to resistance in circuits carrying steady direct current. The magnitude of the impedance Z of a circuit is equal to the maximum value of the potential difference, or voltage, V (volts) across the circuit, divided by the maximum value of the current I (amperes) through the circuit, or simply Z = V/I.

Why can’t the DC ammeter measure and alternating current?

A direct current is a constant current which has zero frequency. So, AC ammeter is used to measure the alternating current. DC ammeters can measure constant current i.e. direct current. Hence, alternating current cannot be measured by DC ammeter because the average value of current for the complete cycle is zero.

What is the main difference between resistance and impedance?

The main difference between Resistance and Impedance is that resistance opposes the flow of DC & AC current whereas Impedance only opposes the flow of AC current. Impedance is having meaning only in AC circuit.

What is the difference between impedance and resistance?

Resistance is a concept used for DC (direct currents) whereas impedance is the AC (alternating current) equivalent. Resistance is due to electrons in a conductor colliding with the ionic lattice of the conductor meaning that electrical energy is converted into heat.

Is AC resistance higher than DC resistance?

The AC resistance (called as impedance) is equal to vector some of the DC resistance and the reactance. Hence it is always greater than the DC resistance.

How many times DC resistance is less than AC resistance?

It is a general practice to take Ac resistance as 1.5 times DC resistance. for DC current : current distributes in a uniform way through the conductor cross section area.

What is difference between resistance and impedance?

What is the difference between resistance and impedance in AC circuits?

In other words, in an AC circuit electrical resistance is called “Impedance”. In both cases this voltage-current ( V-I ) relationship is always linear in a pure resistance. So when using resistors in AC circuits the term Impedance, symbol Z is the generally used to mean its resistance.

Should you take AC resistance or DC resistance when solving electrical circuits?

When solving electric circuits for finding resistance and you are not sure which one should you take into account whether AC or DC resistances, then, if the current passed is AC, then take AC resistance else if the current passed is DC, take DC resistance. Related Post: Why Do Electronic Circuits Use DC Current instead of AC?

What is the relationship between voltage and current in an AC circuit?

This shows that a pure resistance within an AC circuit produces a relationship between its voltage and current phasors in exactly the same way as it would relate the same resistors voltage and current relationship within a DC circuit.

What is the average power consumed by an AC resistance?

Average power is the dc power and is absorbed by resistor only. The average power in a reactive or resistive circuit depends on the angle between the voltage and the current. Since 𝛉 = 0 the power factor equals one, so the average power consumed by an AC resistance is given by ohm’s law: P = V*I = I2R = V2/R