Calculate the resistance from the average power and the rms voltage using equation 21-6. Then, from the resistance and rms voltage, solve for the rms current using Ohm's Law (equation 21-2). Convert the rms current to maximum current by multiplying it by the square root of two..
Thereof, what is rms value of current?
The RMS value is the effective value of a varying voltage or current. It is the equivalent steady DC (constant) value which gives the same effect. For example, a lamp connected to a 6V RMS AC supply will shine with the same brightness when connected to a steady 6V DC supply.
Also, what is difference between RMS and peak value? The peak value is the highest voltage that the waveform will ever reach, like the peak is the highest point on a mountain. The RMS (Root-Mean-Square) value is the effective value of the total waveform. It is equal to the level of the DC signal that would provide the same average power as the periodic signal.
Likewise, people ask, what is RMS formula?
RMS Voltage Equation Then the RMS voltage (VRMS) of a sinusoidal waveform is determined by multiplying the peak voltage value by 0.7071, which is the same as one divided by the square root of two ( 1/√2 ).
What is the peak current?
The peak current is the maximum amount of current which output is capable of sourcing for brief periods of time. When a power supply or an electrical device is first turned on, high initial current flows into the load, starting at zero and rising until it reaches a peak value, known as the peak current.
Related Question Answers
Why use root mean square instead of average?
Simple: the average of a sine is zero. so to get average power you calculate average voltage squared. RMS gives you the equivalent DC voltage for the same power. If you would measure the resistor's temperature as a measure of dissipated energy you'll see that it's the same as for a DC voltage of 0.71 V, not 0.64 V.What is rms in AC circuit?
RMS, or root mean square (also called effective), voltage is a method of denoting a voltage sine waveform (AC waveform) as an equivalent voltage which represents the DC voltage value that will produce the same heating effect, or power dissipation, in circuit, as this AC voltage.How do you convert watts to RMS?
When converting 1 watt into RMS, simply multiply 1 by 0.707.This would mean that 1 watt is equal to 0.707 RMS, 2 watts are equal to 1.414 RMS and so on and so forth. The value 0.707 is a constant figure and the only variable that you should change in conversion of watt to RMS is the value 1.How do you convert rms to peak power?
Peak power can either be calculated by determining the peak current, and then calculating the peak power using the power equation: P = I2R. For a sinusoidally varying current, we determined that a peak Power to RMS calculator would simply multiply the peak power by 0.7071.What is the formula of RMS value?
RMS Value Formula
| Sr. No. | Nature of AC Waveform | Formula for RMS Value |
| 1) | Sinusoidal AC Current or Voltage having peak value Im or Vm | Im / √2 or Vm/√2 |
| 2) | Any function f(x) | |
| 3) | Complex Wave | Square root of rms value of individual components |
| 4) | Symmetrical Square Wave with amplitude 'a' and time period T. | 'a' (equal to Amplitude ) |
What is rms value of DC?
The RMS value is the effective value of a varying voltage or current. It is the equivalent steady DC (constant) value which gives the same effect. For example, a lamp connected to a 6V RMS AC supply will shine with the same brightness when connected to a steady 6V DC supply.Is 220v RMS or peak?
Peak value of 220V a.c. is root(2)*220 = 1.414*220V. This is because 220V is the r.m.s.What is RMS and average value?
If a wave is represented by a RMS value then it is the closest possible DC value of that wave. So RMS value is defined as the square root of means of squares of instantaneous values. Whereas an average value just considers the sum of all instantaneous values ( positive and negative).Why RMS value is calculated?
They help to find the effective value of AC (voltage or current). This RMS is a mathematical quantity (used in many math fields) used to compare both alternating and direct currents (or voltage). Hence, taking an average value (mean) I20/2 and then determining the square root I0/√2 would give the RMS.What is average current and RMS current?
the average valure is the DC component in the AC signal, whereas the RMS is the effective value that would generate a heat through a resistor like DC.What do you mean by peak factor?
Definition: Peak Factor is defined as the ratio of maximum value to the R.M.S value of an alternating quantity. The alternating quantities can be voltage or current.What is peak to peak value?
peak-to-peak value in Electrical EngineeringPeak-to-peak value is the maximum voltage change occurring during one cycle of alternating voltage or current. The peak-to-peak value of an AC voltage is defined as the difference between its positive peak and its negative peak.How can I calculate average?
The average of a set of numbers is simply the sum of the numbers divided by the total number of values in the set. For example, suppose we want the average of 24 , 55 , 17 , 87 and 100 . Simply find the sum of the numbers: 24 + 55 + 17 + 87 + 100 = 283 and divide by 5 to get 56.6 .Does current depend on frequency?
In case of resistive load, the current is only dependent on its resistance, it doesn't depend on the frequency of AC supply. It's a phenomenon by which illumination of radiation(light) results in ejection of electrons from the surface of a material which thus gives rise to current.How do you determine power factor?
Calculate the apparent power, or Voltage Squared divided by Impedance, as well as True Power, by multiplying Current squared by the resistance in your circuit. The Power Factor is Watts divided by Volt-Amps. Keep reading to see examples of these calculations!How does current flow in an AC circuit?
In an alternating-current circuit, voltage periodically reverses itself. When the voltage reverses, so does the direction of the current flow. The electrons in an AC circuit don't really move along with the current flow. Instead, they sort of sit and wiggle back and forth.What is power factor in AC circuit?
In AC circuits, the power factor is the ratio of the real power that is used to do work and the apparent power that is supplied to the circuit. The power factor can get values in the range from 0 to 1.How does AC circuit work?
In an alternating-current circuit, voltage periodically reverses itself. When the voltage reverses, so does the direction of the current flow. The electrons in an AC circuit don't really move along with the current flow. Instead, they sort of sit and wiggle back and forth.Can voltage and current be added together if they are in phase?
"In phase" means that the AC voltage and current vary together in time; when the voltage reaches its peak so does the current, and when the voltage is zero, so is the current. The instantaneous current is always proportional to the instantaneous voltage. 
John Parsons 
