Why is AC measured in RMS?
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Why is AC measured in RMS?
The reason why RMS is used for AC quantities is because the magnitude represents an exact equivalent to what a DC quantity magnitude would have. In terms of heating of a resistor, for example, 100 Vrms AC across a 100 ohm resistance will produce the same heating as 100 VDC across the same 100 ohm resistance.
Why we go for RMS value?
Attempts to find an average value of AC would directly provide you the answer zero… Hence, RMS values are used. 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).
What is the measurement of AC?
The capacity of an air conditioner refers to the amount of heat it can remove. Rounding up 11,917 Btu/hr gives you 12,000 Btu/hr, which is one ton of air conditioner capacity.
Therefore, the relationship between the peak and the rms value of current in an a.c. circuit is Irms=0.707I0. Note:Now, the peak value of current is defined as the maximum or highest value of current obtained in the one cycle.
What is the rms value of AC which when passed through a resistor?
Heat produced by ac = 2 × Heat produced by dc ∴ i2rmsRt=2×i2Rt⇒I2rms=2×22⇒irms=2√2=2.82A. What is the rms value of an alternating current which when passed through a resistor produces heat which is thrice that produced by a direct current of 2 A in the same resistor?
When an AC voltage is applied across a resistance the current in the circuit will?
Impedance
The current flowing through the resistance is directly proportional to the voltage across it with this linear relationship in an AC circuit being called Impedance.
How is effectiveness of AC measured?
A room air conditioner’s efficiency is measured by the energy efficiency ratio (EER). The EER is the ratio of the cooling capacity (in British thermal units (Btu) per hour) to the power input (in watts). The higher the EER rating, the more efficient the air conditioner.