How do you find the maximum value of current?
AC sine wave current is measured according to its RMS ( Root Mean Square ) value. This is 0.7071 of the peak current and is equal to the DC current which has the same heating effect. The maximum AC value is periodically the sqrt(2) or 1.4142 times the RMS value.
What is the time taken by the alternating current of 50 Hz with an rms value of 10 ampere to reach from zero to a maximum value and what is the peak value of current?
Time taken by the current to reach the maximum value t=T4=14v=14×50=5×10−3sec and i0=irms√2=10√2=14.14 amp.
What is the time taken by the alternating current of 50hz?
5×10−3s.
What will be the approximate time taken by AC of frequency 60 Hz to go from zero to maximum or peak value?
Calculate the time taken by 60 Hz a.c source to reach its negative peak value from zero value? t=T4=150×4s=1240 second.
How do you find the maximum value of alternating voltage?
The resulting formula is: Thus, the 110 volt value given for alternating current supplied to homes is only 0.707 of the maximum voltage of this supply. The maximum voltage is approximately 155 volts (110 × 1.41 = 155 volts maximum).
What is a maximum value of a function?
The maximum value of a function is the place where a function reaches its highest point, or vertex, on a graph. If your quadratic equation has a negative a term, it will also have a maximum value. If you have the graph, or can draw the graph, the maximum is just the y value at the vertex of the graph.
How much time will the current take in reaching from zero to maximum value?
The time taken by the alternating current in reaching from zero to maximum value and r.m.s. value of current will be respectively 0.005 s, 10A.
How many times will the current becomes zero in a second?
The current become zero, twice in one cycle. ∴ In one second it will be zero, 50 times .
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 peak value of AC at 220 Volt?
311 V
We know that voltage rating is the most rms also known as root mean square value of the voltage. So we can say that the peak voltage in a 220 V, 50 Hz Ac source is 311 V.
What will be the equation of AC of frequency 75 Hz?
I=202 sin(75πt)
What is maximum value of voltage?
The instantaneous value of the voltage varies from zero at 0° to maximum at 90°, back to zero at 180°, to maximum in the opposite direction at 270°, and to zero again at 360°.
How do you calculate the maximum value of alternating current?
Maximum value of current, I max = 15A Frequency of alternating current, f = 60 Hz 1 The equation for instantaneous value of sinusoidal alternating current with θ as zero when time is zero, is given as I = I max sin 2π f t = 15 sin 2π 60 t
How do you find the time constant of a charging circuit?
RC Charging Circuit Example No1 Calculate the RC time constant, τ of the following circuit. The time constant, τ is found using the formula T = R x C in seconds. Therefore the time constant τ is given as: T = R x C = 47k x 1000uF = 47 Secs
What is the effect of time constant on induced voltage?
At the magnitude of the induced voltage is The voltage across the inductor therefore drops to about of its initial value after one time constant. The shorter the time constant the more rapidly the voltage decreases.
Why is the peak value of an alternating current never used?
In specifying an alternating voltage or current, its peak or maximum value is rarely used because it has that value only twice each cycle. Furthermore, the average or mean value cannot be used because it is positive as much as it is negative, so the average value is zero.