In the circuit shown in figure neglecting source resistance the voltmeter and ammeter reading will respectively, will be 

(1) 0V, 3A

(2) 150V, 3A

(3) 150V, 6A

(4) 0V, 8A

In the circuit shown in the figure, the ac source gives a voltage $V=20\cos \left(2000\text{\hspace{0.17em}}t\right).$ Neglecting source resistance, the voltmeter and ammeter reading will be: 

(1) 0V, 0.47A

(2) 1.68V, 0.47A

(3) 0V, 1.4 A

(4) 5.6V, 1.4 A

An ac source of angular frequency ω is fed across a resistor r and a capacitor C in series. I is the current in the circuit. If the frequency of the source is changed to ω/3 (but maintaining the same voltage), the current in the circuit is found to be halved. Calculate the ratio of reactance to resistance at the original frequency ω.
1. $\sqrt{\frac{3}{5}}$
2. $\sqrt{\frac{2}{5}}$
3. $\sqrt{\frac{1}{5}}$
4. $\sqrt{\frac{4}{5}}$

For a series RLC circuit, R = X_L = 2X_C. The impedance of the circuit and phase difference between V and i will be:

1. $\frac{\sqrt{5}R}{2},$ ${\tan }^{-1}\left(2\right)$

2. $\frac{\sqrt{5}R}{2},{\tan }^{-1}\left(\frac{{\displaystyle 1}}{{\displaystyle 2}}\right)$

3. $\sqrt{5}{X}_C,{\tan }^{-1}\left(2\right)$

4. $\sqrt{5}R,$ ${\tan }^{-1}\left(\frac{{\displaystyle 1}}{{\displaystyle 2}}\right)$

In the adjoining ac circuit the voltmeter whose reading will be zero at resonance is

(1) V₁

(2) V₂

(3) V₃

(4) V₄

In the adjoining figure, the impedance of the circuit will be:

(1) 120 ohm

(2) 50 ohm

(3) 60 ohm

(4) 90 ohm

In a series LCR circuit, which one of the following curves represents the variation of impedance (Z) with frequency (f)?

1.		2.
3.		4.

The variation of the instantaneous current (I) and the instantaneous emf (E) in a circuit are shown in the figure. Which of the following statements is correct?

The figure shows the variation of R, X_L, and X_C with frequency f in a series L, C, R circuit. Then for what frequency point, the circuit is inductive:

(1) A

(2) B

(3) C

(4) All points

An ac source of variable frequency f is connected to an LCR series circuit. Which one of the graphs in the figure represents the variation of the current I in the circuit with frequency f :

(1)

(2)

(3)

(4)