Representation of AC Current and Voltage By Rotating Vectors-Phasors

IMPORTANT

Representation of AC Current and Voltage By Rotating Vectors-Phasors: Overview

This topic consists of various concepts like Phasor Diagram in AC,Phasor Diagram for Pure Resistance Circuit,Phase Difference in Voltage and Current in Pure Resistance, etc.

Important Questions on Representation of AC Current and Voltage By Rotating Vectors-Phasors

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Given below are two statements:
Statement-I: In an ac circuit, the current through a capacitor leads the voltage across it.
Statement-II: In a.c. circuits containing pure capacitance only, the phase difference between the current and the voltage is π In the light of the above statements, choose the most appropriate answer from the options given below:
 

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Given below are two statements:

Statement-I: In an ac circuit, the current through a capacitor leads the voltage across it.

Statement-II: In a.c. circuits containing pure capacitance only, the phase difference between the current and the voltage is π

In the light of the above statements, choose the most appropriate answer from the options given below:

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Select the correct phasor diagram of the circuit having only resistance.

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Discuss the phasor diagram of an a.c circuit with a pure resistance only.

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An A.C source supply voltage, E=200 sin314t is applied to a pure resistance circuit containing resistance 200 Ω. Calculate the peak value of current.

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If in ac circuit there is no leading or lagging between supplied voltage and current then ac circuit is named as

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In a certain circuit, E=200 cos(314 t) and I=sin(314 t+π/4). Their vector representation is

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In a circuit made up of resistance 4 Ω, and inductance 0.01 H, an alternating emf 200 V at 50 Hz is connected, then the phase difference between the current and the emf in the circuit is:

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200 Ω resistance and 1 H inductance are connected in series with an AC circuit. The frequency of the source is 2002π Hz. Then phase difference in between V and I will be :-

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In series LCR circuit, the phase angle between supply voltage and current is

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Voltage and current in an AC circuit are given by V=5sin100 πt-π6 and I=4sin100πt+π6

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For the equation yt=5cmsin3πt+3cos3πt where t is in seconds, find amplitude and time period.

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If the input voltage Vi to the circuit below is given by Vit=Acos2πft, the output voltage is given by Vot=Bcos2πft+ϕ.

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Which one of the following four graphs best depict the variation of ϕ vs f?

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In an A.C. circuit, the resistance R is connected in series with an inductor of self-inductance L. If phase angle between voltage and current be 45o , the value of inductive reactance XL will be equal to.....

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In an L.C.R. series a.c. circuit, the current

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The circuit given in figure has a resistanceless choke coil L and a resistance R. The voltage across R and L are given in figure. The virtual value of the applied voltage is


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In a series LCR circuit the rms voltages across the inductance, capacitance and resistance are respectively 4 V8 V and 5 V. The RMS voltage of the AC source in the circuit is

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In a circuit L,C and R are connected in series with an alternating voltage source of frequency f. The current leads the voltage by 45°. The value of C is

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If a circuit made up of a resistance 1 Ω and inductance 0.01 H, an alternating emf 200 volt at 50 Hz is connected, then find the phase difference between the current and the emf in the circuit