Recent questions

0 votes

0 answers

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

A coil of inductance L has an inductive reactance of `X_L` in an AC circuit in which the effective current is I. The coil is made from a super-conducting material and has no resistance. The rate at which power is dissipated in the coil

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

When 100 volt dc is applied across a coil, a current of 1A flows through it. When 100 volt ac at 50 cyle `s^(-1)` is applied to the same coil, only 0.5 A current flows. The impedance of the coil

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

Two identical incandesant light bulbs are connected as shown in figure. when the circuit is an AC voltage source of frequency f, which of the following observations will be

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

An LC circuit contains a 20 mH inductor and a `50muF` capacitor with an initial charge of 10 mc. The resistance of the circuit is negligible. At the instant the circuit is closed be t = 0. At what time is the energy stored compeletly

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

In the circuit shown below, the ac source has voltage `v = 20 cosomegat` volts with `omega= 2000 `rad/sec.The amplitude of the current will be nearest

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

The quality factor of LCR circuit having resistance (R) and inductance (L) at resonance frequency `(omega)` is given

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

For high frequency, a capacitor

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

The coil of a choke in a

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

The power factor of an ac circuit having resistance (R) and inductance (L) connected in series and an angular velocity w

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

An inductor of inductance L and resistor of resistance R are joined in series and connected by a source of frequency ω power dissipated in the circuit

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

In a LCR circuit capacitance is changed from C to 2C. For the resonant fequency to remain unchanged, the inductance should be change from L

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

In an LCR series ac circuit the voltage across each of the components L, C and R is 50 V. The voltage across the LC combination will

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

An inductor L and capacitor C are connected in the circuit as shown in fig. The frequency of the power supply is equal to the resonant frequency of the circuit. Which ammeter will read zero

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

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 `45^0` . The value of c

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

In a series resonant LCR circuit, the voltage across R is 100 V and `R= 1kOmega` with `C =2muF`. The resonant frequency `omega` is 200 rad/s.At resonance the voltage across L

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

A coil of inductive reactance `31Omega` has a resistance of `8Omega` . It is placed in series with a condenser of copacitive reactance `25Omega` . The combination is connected to an a.c. source of 110 volt. The power factor of the circuit

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

The diagram shows a capacitor C and resistor R connected in series to an ac source. V1 and V2 are voltmeters and Ais an ammeter, consider the following statements. (1) Readings in A and V2 are always in phase. (2) Reading in V1 is ahead in phase with reading in V2 . (3) Reading in A and V1 are always in phase. Which of these statements are / is

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

The reading of ammeter in the circuit shown will

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

0 votes

0 answers

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

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

Recent questions

Categories