Recent questions tagged #sub

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Calculate impedance of the given circuit :

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

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For what frequency the voltage across the resistance R will be

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

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A capacitor, a resistor and a 40 mH inductor are connected in series to an 60Hz AC source of frequency 60Hz, calculate the capacitance of the capacitor, if the current is in phase with the voltage. Also calculate the value of X and

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

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A coil, a capacitor and an A.C. source of rms voltage 24 V are connected in series, By varying the frequency of the source, a maximum rms current 6 A is observed, If this coil is connected to a bettery of emf 12 V, and internal resistance `4Omega` , then calculate the current through the

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

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Radio receiver recives a message at 300m band, If the available inductance is 1 mH, then calculate required

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

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In a L–C circuit parallel combination of inductance of 0.01 H and a capacitor of `1muF` is connected to a variable frequency alternating current source as shown in figure. Draw a rough sketch of the current variation as the frequency is changed from 1kHz to

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

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A voltage of 10 V and frequency `10^3 Hz` is applied to `1/pi muF` capacitor in series with a resistor of `500Omega`. Find the power factor of the circuit and the power

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

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If `V = 100 sin 100 t volt and I = 100 sin (100 t +pi/3) mA` for an A.C. circuit then find out(a) phase difference between V and I (b) total impedance, reactance, resistance(c) power factor and power dissipated (d) components contains by

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

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If power factor of a R-L series circuit is `1/2` when applied voltage is `V = 100 sin 100pit` volt and resistance of circuit is `200Omega` then calculate the inductance of the

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

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A circuit consisting of an inductance and a resistacne joined to a 200 volt supply (A.C.). It draws a current of 10 ampere. If the power used in the circuit is 1500 watt. Calculate the wattless

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

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A coil has a power factor of 0.866 at 60 Hz. What will be power factor at 180

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

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A choke coil and a resistance are connected in series in an a.c circuit and a potential of 130 volt is applied to the circuit. If the potential across the resistance is 50 V. What would be the potential difference across the choke

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

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An electric lamp which runs at 80V DC consumes 10 A current. The lamp is connected to 100 V – 50 Hz ac source compute the inductance of the choke

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

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Calculate the resistance or inductance required to operate a lamp (60V, 10W) from a source of (100 V, 50

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

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A choke coil of resistance R and inductance L is connected in series with a capacitor C and complete combination is connected to a.c. voltage, Circuit resonates when angular frequency of supply is `omega = omega_0`. (a) Find out relation betwen `omega_0, L and C` (b) What is phase difference between V and I at resonance, is it changes when resistance of choke coil is

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

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An LC circuit contains a 20mH inductor and a `50muF` capacitor with an initial charge of 10mC. The resistance of the circuit is negligible. Let the instant the circuit is closed to be `t = 0.`What is the total energy stored

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

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An LC circuit contains a 20mH inductor and a `50muF` capacitor with an initial charge of 10mC. The resistance of the circuit is negligible. Let the instant the circuit is closed to be `t = 0.`What is the natural frequency of the

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

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

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

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An LC circuit contains a 20mH inductor and a `50muF` capacitor with an initial charge of 10mC. The resistance of the circuit is negligible. Let the instant the circuit is closed to be `t = 0.`At what times is the total energy shared equally between inductor and the

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

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An inductor `(X_L=2Omega)` a capacitor `(X_C=8Omega)` and a resistance `(8Omega)` is connected in series with an ac source. The voltage output of A.C source is given by `V=10 cos 2pi50t`. Find the instantaneous p.d. between A and B when the voltage output from source is half of its

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

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