INTRODUCTION TO ALTERNATING CURRENT
What is current?
Movement of charges randomly
Movement of charges under an applied potential.
Movement of charges in an open circuit
Movement of charges in an applied potential per unit time
Select the correct statement
A.c current has both magnitude and direction
D.c current has both magnitude and direction
A.c has only magnitude and no direction
D.c has no magnitude and no direction
Based on the statement above, which of the following is a characteristic of a.c current?
It alternates between high and low values
It oscillates in a fixed period similar to a sin wave
It is convenient for transmission than d.c
It has a fixed value
The average value of a.c current is zero. Select the correct statement to justify
Yes, but the average value is taken only for half cycle. 0 to ฯ
Yes, but the avrage value is not the correct operation to measure total current in a.c circuits
Yes, but it isn't bothersome to calculations.
The proposed statement is wrong
The average value of current in a.c is taken only for half cycle. [0 to ฯ]
True
False
A.c wave is only sinusoidal in nature. True or False
False, it can be other waveforms like saw-tooth wave, ramp wave with a fixed period
True. It can only be sinosoidal
False, it is a hyperbolic wave
Maybe false. I don't know
Phasor diagram represents
Two or more sin waves
Two sine waves with same frequency
Two sine waves with same frequency for linear circuits
Two sine waves with same frequency for linear circuits by open arrows rotating counterclockwise
In the above circuit a single resistor is connected in series with the a.c voltage source.
There is no phase difference between voltage and current.
Both current and voltage are sinusoidal wave forms
The power is dissipated by the resistor will always be positive
All are true
The above graph is true for
A.c current and a.c voltage
A.c current and a.c voltage for one cycle
A.c current and d.c voltage
D.c current and a.c voltage
Select the correct image for a.c circuits
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