In an $LCR$ circuit, the potential difference between the terminals of the inductance is $60$ V, between the terminals of the capacitor is $30$ V and that between the terminals of the resistance is $40$ V. The supply voltage will be equal to:

1. $50$ V

2. $70$ V

3. $130$ V

4. $10$ V

In an LR-circuit, the inductive reactance is equal to the resistance R of the circuit. An e.m.f. $E=E_0\cos \left(\omega t\right)$ applied to the circuit. The power consumed in the circuit is:

1. $\frac{E_0^2}{R}$

2. $\frac{E_0^2}{2R}$

3. $\frac{E_0^2}{4R}$

4. $\frac{E_0^2}{8R}$

In the circuit given below, what will be the reading of the voltmeter 

1. 300 V

2. 900 V

3. 200 V

4. 400 V

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