Impedance Triangle

Q. If capacitive reactance is $\sqrt{3}$ times that of resistance in an AC circuit of frequency 50 Hz, then the time lag between current and voltage in milli seconds is (write until two digits after the decimal point.)

Q. Paragraph for below question
नीचे दिए गए प्रश्न के लिए अनुच्छेद

For the shown AC circuit, answer the following question.

दर्शाए गए AC परिपथ के लिए, निम्नलिखित प्रश्न का उत्तर दीजिए।


Q. Net impedance of the circuit is

प्रश्न - परिपथ की नेट प्रतिबाधा है

1. 2 Ω
2. 5 Ω
3. 6 Ω
4. 10 Ω

Q. Which of the following combination should be selected for better tuning of an LCR circuit used for communication?

1. $R=25\Omega ,L=1\cdot 5H,C=45\mu F$
2. $R=25\Omega ,L=1.5H,C=35\mu F$
3. $R=25\Omega ,L=2.5H,C=45\mu F$
4. $R=15\Omega ,L=3.5H,C=30\mu F$

Q. The phase angle between e.m.f. and current in LCR series ac circuit is

1. $0to\frac{\pi }{2}$
2. $\frac{\pi }{4}$
3. $\frac{\pi }{2}$
4. $\pi$

Q. In an RLC series circuit shown in the figure, the readinf of voltmeter $V_1$ and $V_2$ are $100V$ and $120V$, respectively. The source voltage is $130V$. For this situation, mark out the correct statement(s).

1. Voltage across resistor, inductor and capacitor are $50V$, $50\sqrt{3}V$ and $120+50\sqrt{3}V$ respectively
2. Voltage across resistor, inductor and capacitor are $50V$, $50\sqrt{3}V$ and $120-50\sqrt{3}V$ respectively
3. Pwer factor of the circuit is $5/13$
4. The circuit is capacitive in nature

Q. Which of the following statements is incorrect about quality factor (Q) of a circuit (L-C-R in series)?

1. It is a dimensionless term
2. Ratio of inductive reactance to resistance at resonance frequency
3. Large R indicates high quality factor
4. It is directly proportional to band width

Q. The reading of A . C ammeter and voltage across capacitor in the given circuit are

1. $3$ amp, $30V$
2. $4$ amp, $40V$
3. $5$ amp, $50V$
4. 2 amp, $20V$

Q. In an RLC series circuit shown in the figure, the readinf of voltmeter $V_1$ and $V_2$ are $100V$ and $120V$, respectively. The source voltage is $130V$. For this situation, mark out the correct statement(s).

1. Voltage across resistor, inductor and capacitor are $50V$, $50\sqrt{3}V$ and $120+50\sqrt{3}V$ respectively
2. Voltage across resistor, inductor and capacitor are $50V$, $50\sqrt{3}V$ and $120-50\sqrt{3}V$ respectively
3. Pwer factor of the circuit is $5/13$
4. The circuit is capacitive in nature

Q. The reading of A . C ammeter and voltage across capacitor in the given circuit are

1. 2 amp, $20V$
2. $5$ amp, $50V$
3. $3$ amp, $30V$
4. $4$ amp, $40V$