In some countries the AC frequency is 50 Hz. What is the time interval for one c

Question

In some countries the AC frequency is 50 Hz. What is the time interval for one cycle at this frequency? An AC voltage source, with a peak output of 200 V, is connected to a 25 ohm resistor. What is rms current in the circuit ? An AC voltage source, with a peak output of 200 V, is connected to a 25 ohm resistor. What is the rate of energy dissipated due to heat in the resistor? Which of the following combinations of circuit components can be used to make a tuner for a radio, to select the desired frequency When a 50 muF capacitor is attached to an AC source, its capacitive resistance is 60 ohm. If instead a 200muF capacitor is attached to the same source, what will be its capacitive reactance?

Explanation / Answer

1) b)0.02 s

2) c)5.7 A

3) c) 800 W

4) b only

5) we know, XL = 1/(2*pi*f*C)

so,

XL1/XL2 = C2/C1

==> XL2 = XL1*(C1/C2)

= 60*(50/200)

= 15 ohms

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