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प्रश्न
The alternating current in a circuit is described by the graph shown in figure. Show rms current in this graph.
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उत्तर
Graph or rms current is shown below by dotted line
`I_(rms) = sqrt((1^2 + 2^2)/2) = sqrt(5/2)` = 1.6A
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संबंधित प्रश्न
A device 'X' is connected to an ac source V = V0 sin ωt. The variation of voltage, current and power in one cycle is shown in the following graph:
(a) Identify the device 'X'.
(b) Which of the curves A, B and C represent the voltage , current and the power consumed in the circuit? Justify your answer.
(c) How does its impedance vary with frequency of the ac source? Show graphically.
(d) Obtain an expression for the current in the circuit and its phase relation with ac voltage.
Effective voltage Vrms is related to peak voltage Vo by ______.
Study the circuits (a) and (b) shown in figure and answer the following questions.
 (a) |
 (b) |
- Under which conditions would the rms currents in the two circuits be the same?
- Can the rms current in circuit (b) be larger than that in (a)?
Can the instantaneous power output of an ac source ever be negative? Can the average power output be negative?
When an AC voltage is applied to a pure resistor, the current and voltage are ______.
The average value of alternating current over one complete cycle is ______.
The RMS (root mean square) value of current is related to peak current im by ______.
Using \[P_{\mathrm{loss}}=I^{2}R\], what reduces energy losses during transmission?
Which advantage do AC generators have over DC sources at a large scale?
Which expression describes alternating voltage that varies sinusoidally with time?
In \[v=v_m\sin\omega t\], what does \[v_m\] represent?
What does Kirchhoff's Voltage Law give when the only element connected to the AC voltage source is resistor \[R\]?
Which expression gives instantaneous power in a pure resistor AC circuit?
What physical effect makes an RMS value an equivalent “effective” value?
Which notation identifies the RMS values of voltage and current?
What is the peak voltage of a \[220\,\mathrm{V}\] AC supply?
