A series circuit consists of a resistance of `15 Omega`, an inductance of 0.08H and a capacitor of capacitance `30 mu F`. The applied voltage has frequency of `500 rad//s`. Does the current lead or lag the apllied voltage and by what angle.
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A closed circuit consists of a source of constant `emf E` and a choke coil of inductance `L` connected in series.The active resistance of the whole ci
Correct Answer - C We write the equation of the circuit as `Ri+L/eta(di)/(dt)=xi` For `t le 0`.The current at `t=0` just after inductance is changed is `i=etaxi/R`, so that the flux...
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A series `AC` circuit has a resistance of `4 Omega` and a reactance of `3 Omega`. The impedance of the circuit is
`Z=sqrt(4^(2)+3^(2))=5 Omega`
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A series circuit consists of a resistance inductance and capacitance.The applied voltage and the current at any instant are given by `E=141.4 cos(5000
Correct Answer - `4 muF,R=141.4/5 Omega` Here phase difference `(0)=360^(0)` & `omega=5000` at Resonance `C=1/(5000)^(2)xx1/(0.01)` `R=V_(0)/I_(0)=141.4/5`
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A resistance (R), inductance (L) and capacitance (C) are connected in series to an ac source of voltage V having variable frequency. Calculate the ene
Correct Answer - `(piRsqrt(LCV)^(2))/(R^(2)+2.25(L)/(C))`
2 Answers 1 views
If `y_(1)=max||z-omega|-|z-omega^(2)||`, where `|z|=2` and `y_(2)=max||z-omega|-|z-omega^(2)||`, where `|z|=(1)/(2)` and `omega` and `omega^(2)` are c
Correct Answer - C `(c )` We have `||z_(1)|-|z_(2)|| le |z_(1)-z_(2)|` and equality holds only when `argz_(1)=argz_(2)` `implies||z-w|-|z-w^(2)|| le |w^(2)-w| le sqrt(3)` and equality canhold only when `|z|=2` and not when...
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An 220V AC voltage at a frequency of 40 cycles/s is applied to a circuit containing a pure inductance of 0.01H and a pure resistance of `6 Omega` in s
Correct Answer - `(a) 33.83 mA (b) 202.98 V (c ) 96.83 V (d) 0.01579 s`
2 Answers 1 views
A series circuit consists of a resistance, inductance and capacitance. The apllied voltage and the current at any instant are given as e=141.4 cos (30
Correct Answer - `33.33 mu F`
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In series LCR circuit `R=120 Omega` and it has resonant frequency `4000 rad//sec`. At resonance, the voltage across resistance and inductance is 60 V
Correct Answer - `20 mH, (25)/(8) mu F`
2 Answers 1 views
The resistance of two conductors in series is `18 Omega` and the resistance becomes `4 Omega` when connected in parallel. Find the resistance of indiv
Correct Answer - `12 Omega, 6 Omega`
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A 20 V battery of internal resistance `1 Omega` is connected to three coils of `12 Omega, 6 Omega` and `4 Omega` in parallel, a resistor of `5Omega` a
Correct Answer - `1.2 A, 0.2 A, 0.4 A, 0.6 A, 18.8 V, 10.4 V`
2 Answers 1 views