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प्रश्न
If the reading of the voltmeter V1 is 40 V, then the reading of voltmeter V2 is ______.
पर्याय
30 V
58 V
29 V
15 V
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उत्तर
If the reading of the voltmeter V1 is 40 V, then the reading of voltmeter V2 is 30 V.
Explanation:
We know that
Vrms = `"V"_0/sqrt(2)`
= `(50sqrt(2))/sqrt(2)`
Vrms = 50
V2 = `sqrt("V"_("rms")^2 - "V"_1^2)`
= `sqrt((50)^2 - (40)^2)`
V2 = 30
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संबंधित प्रश्न
An alternative voltage given by V = 140 sin 314t is connected across a pure resistor of 50 Ω. Find
- The frequency of the source.
- The rms current is through the resistor.
A 100 Ω resistor is connected to a 220 V, 50 Hz ac supply.
- What is the rms value of current in the circuit?
- What is the net power consumed over a full cycle?
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)?
The alternating current in a circuit is described by the graph shown in figure. Show rms current in this graph.
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 ______.
The average power dissipated in a resistor when an AC current of peak value im flows through it is ______.
