Recent questions in Physics

A series LCR circuit with $L= 0.12 H,C= 480\;nF,R= 23 \Omega$ is connected to a $230\;v$ variable frequency supply .For What frequencies of the circuit half the power at resonant frequency . What is the current amplitute at these frequencies?

asked Sep 19, 2016 by meena.p

1 answer

A series LCR circuit with $L= 0.12 H,C= 480\;nF,R= 23 \Omega$ is connected to a $230\;v$ variable frequency supply .What is the source frequency for which average power absorbed by the circuit is maximum ? obtain the value of this mass power

asked Sep 19, 2016 by meena.p

1 answer

A series LCR circuit with $L= 0.12 H,C= 480\;nF,R= 23 \Omega$ is connected to a $230\;v$ variable frequency supply .

asked Sep 19, 2016 by meena.p

1 answer

Suppose a circuit containing 80 mH and a $60 \mu F$ capacitor in series is connected to a $230\;V, 50 \;Hz$ Supply . The resistance in the circuit is negligible . obtain the average power transferred to each element of the circuit , and the total power absorbed .

asked Sep 19, 2016 by meena.p

1 answer

A circuit containing a $80\;mH$ inductor and a $60 \mu F$ capacitor in series is connected to a $230\;v,50\;Hz$ supply . The resistance in the circuit is negligible. What is the total average power absorbed by the circuit ?

asked Sep 19, 2016 by meena.p

1 answer

A circuit containing a $80\;mH$ inductor and a $60 \mu F$ capacitor in series is connected to a $230\;v,50\;Hz$ supply . The resistance in the circuit is negligible. What is the average power transferred to capacitor ?

asked Sep 16, 2016 by meena.p

1 answer

A circuit containing a $80\;mH$ inductor and a $60 \mu F$ capacitor in series is connected to a $230\;v,50\;Hz$ supply . The resistance in the circuit is negligible. What is the average power transferred to inductor ?

asked Sep 16, 2016 by meena.p

1 answer

A circuit containing a $80\;mH$ inductor and a $60 \mu F$ capacitor in series is connected to a $230\;v,50\;Hz$ supply . The resistance in the circuit is negligible. obtain the current amplitude and V.M.S value of potential drop across each element .

asked Sep 16, 2016 by meena.p

1 answer

A circuit containing a $80\;mH$ inductor and a $60 \mu F$ capacitor in series is connected to a $230\;v,50\;Hz$ supply . The resistance in the circuit is negligible. obtain the current amplitude and V.M.S value

asked Sep 15, 2016 by meena.p

1 answer

Keeping the source frequency equal to the resonating frequency of the series LCR circuit , if the three elements L,C and R , an arranged in parallel , show that the total current in the parallel LCR circuit, is a minimum at this frequency . obtain the r.m.s value of current in each branch of the circuit for the elements and source whose values are $L= 5.0 \;H,C= 80\;\mu F, R= 40 \Omega$ for this frequency

asked Sep 15, 2016 by meena.p

1 answer

A $100 \mu F$ capacitor in series with a $40 \Omega$ resistance is connected to a $110\;v,12\;kHz$ supply's Is the statement that a capacitor is a conductor at very high frequencies . True or false ?

asked Sep 15, 2016 by meena.p

1 answer

A $100 \mu F$ capacitor in series with a $40 \Omega$ resistance is connected to a $110\;V,60Hz$ supply , What is the time lag between maximum and voltage maximum ?

asked Sep 15, 2016 by meena.p

1 answer

A $100 \mu F$ capacitor in series with a $40 \Omega$ resistance is connected to a $110\;V,60Hz$ supply , What is the maximum current in the circuit ?

asked Sep 15, 2016 by meena.p

1 answer

How does an inductor behave in a d.c circuit after the steady state ?

asked Sep 15, 2016 by meena.p

1 answer

A coil of inductance $0.50\;H$ and resistance $100 \Omega$ is connected to a $240\;v,50\;Hz$ a.c supply. If the circuit is connected to a high frequency supply (240 v, 10 kHz) then at very frequency , inductor is that circuit nearly amounts to open circuit. Is this statement true or false ?

asked Sep 15, 2016 by meena.p

1 answer

A coil of inductance $0.50\;H$ and resistance $100 \Omega$ is connected to a $240\;v,50\;Hz$ a.c supply What is the time lag between the voltage maximum and current maximum?

asked Sep 14, 2016 by meena.p

1 answer

A coil of inductance $0.50\;H$ and resistance is connected to a $240\;v,50\;Hz$ a.c supply What is the maximum current in the coil ?

asked Sep 14, 2016 by meena.p

1 answer

An LC circuit a $20\;mH$ inductor and a $50 \mu F$ capacitor with an initial charge of $10\;mc$ The resistance of the circuit is negligible. if a resistor is inserted in the circuit , how many energy is eventually dissipated as heat ?

asked Sep 14, 2016 by meena.p

1 answer

An LC circuit a $20\;mH$ inductor and a $50 \mu F$ capacitor with an initial charge of $10\;mc$ The resistance of the circuit is negligible. Let the instant the circuit is closed be $t=0$ , At what time is the total energy should equally between the inductor and the capacitor?

asked Sep 14, 2016 by meena.p

1 answer

An LC circuit a $20\;mH$ inductor and a $50 \mu F$ capacitor with an initial charge of $10\;mc$ The resistance of the circuit is negligible. Let the instant the circuit is closed be $t=0$ , At what time is the energy stored ? (i) Completely electrical? (ii) Completely magnetic ?

asked Sep 12, 2016 by meena.p

1 answer

An LC circuit a $20\;mH$ inductor and a $50 \mu F$ capacitor with an initial charge of $10\;mc$ The resistance of the circuit is negligible. Let the instant the circuit is closed be $t=0$ , What is the natural frequency of the circuit ?

asked Sep 12, 2016 by meena.p

1 answer

An LC circuit a $20\;mH$ inductor and a $50 \mu F$ capacitor with an initial charge of $10\;mc$ The resistance of the circuit is negligible. Let the instant the circuit is closed be $t=0$ , What is the total energy stored initially ? Is it conserved during the oscillations ?

asked Sep 12, 2016 by meena.p

1 answer

A series LCR circuit connected to a variable frequency $230\;v$ Source has $L= 5.0\;H,c=80 \mu F,R= 40 \Omega$ as shown in the figure. Determine the r.m.s potential drops across the three elements of the circuit . What is the potential drop across the LC combination at the resonating frequency .

asked Sep 12, 2016 by meena.p

1 answer

A series LCR circuit connected to a variable frequency $230\;v$ Source has $L= 5.0\;H,c=80 \mu F,R= 40 \Omega$ as shown in the figure. obtain the impedance of the circuit and amplitude of current at the resonating frequency.

asked Sep 12, 2016 by meena.p

1 answer

A series LCR circuit connected to a variable frequency $230\;v$ Source has $L= 5.0\;H,c=80 \mu F,R= 40 \Omega$ as shown in the figure

asked Sep 12, 2016 by meena.p

1 answer

A radio can tune over the frequency range of a portion of MW broadcast band (800 kHz to 1200 kHz) If its LC circuit has an effective inductance of $200\;\mu H$ , What must be the range of its variable capacitor ?

asked Sep 9, 2016 by meena.p

1 answer

A series LCR circuit with $R= 20\; \Omega, L= 1.5\;H$ and $C= 35\;\mu F$ is connected to a variable frequency 200 v a.c supply. when the frequency of the supply equals the natural frequency of the circuit, what is the average power transferred to the circuit in one complete cycle ?

asked Sep 9, 2016 by meena.p

1 answer

A changed $30 \;\mu F$ capacitor is connected to a $27\;mH$ inductor. Suppose the initial charge on the capacitor is $6\;mc$ what is the total energy stored in the capacitor initially ? What is the total energy at later time ?

asked Sep 9, 2016 by meena.p

1 answer

Which of the following frequency will be suitable for beyond the horizon communication using sky waves.

asked Sep 9, 2016 by meena.p

1 answer

A changed $30 \mu F$ capacitor is connected to a $27 mH$ inductor . What is the angular frequency of free oscillation of the circuit ?

asked Aug 23, 2016 by meena.p

1 answer

obtain the resonant frequency $(w_r)$ of a series LCR circuit with $L=2.0 \;H,c=32\;\mu F$ and $R= 100 hm$ What is the Q value of this circuit ?

asked Aug 23, 2016 by meena.p

1 answer

A $60 \mu F$ capacitor is connected to a $110\;v,60\;Hz$ a.c supply what is the net power absorbed by reach circuit over a completed cycle ? explain your answer

asked Aug 23, 2016 by meena.p

1 answer

A $44\;mH$ inductor is connected to $220\;v, 50Hz$ a.c supply . What is the net power absorbed by each circuit over a complete cyde ? Explain your answer

asked Aug 23, 2016 by meena.p

1 answer

A $44\;mH$ inductor is connected to $220\;v,50\;Hz$ a.c supply . Determine the r.m.s value of current in the circuit .

asked Aug 23, 2016 by meena.p

1 answer

The rms value of current in the ac circuit is $10\;A$ What is the peak current ?

asked Aug 23, 2016 by meena.p

1 answer

The peak voltage at an ac supply is $300 \;v$ What is the rms voltage ?

asked Aug 23, 2016 by meena.p

1 answer

A $100 \Omega$ resistor is connected to a $220\;v,50\;Hz$ ac supply. What is the net power consumed over a full cycle ?

asked Aug 23, 2016 by meena.p

1 answer

A $100 \Omega$ resistor is connected to a $220 \;v, 50 Hz$ ac supply . What is the rms values of current in the circuit ?

asked Aug 23, 2016 by meena.p

1 answer

Find the wave length of EM wave of frequency $6 \times 10^{12}\;Hz$ in free space .

asked Aug 22, 2016 by meena.p

1 answer

A light have a wavelength of $6000^{\circ} A$ What is the energy of this light

asked Aug 22, 2016 by meena.p

1 answer

give relation with the E.M waves travel?

asked Aug 22, 2016 by meena.p

1 answer

In a plane electro magnetic wave the electric field oscillates simultaneously at a frequency $3 \times 10^{10} Hz$ and amplitude $50\;v/m$ what is the wave length of the wave

asked Aug 22, 2016 by meena.p

1 answer

A plane electro magnetic wave of frequency $25\;MHz$ travels in free space along the x- direction At a particular point in space and time the electric vector $\overrightarrow{E}= 6.3 v/m \hat j$ . calculate $\overrightarrow{B}$ at this point .

asked Aug 22, 2016 by meena.p

1 answer

You are given a $2 \mu F$ parallel plate capacitor .How would you establish an instantaneous displacement current of $1\;MA$ in the space between its plate ?

asked Aug 22, 2016 by meena.p

1 answer

What feature of electromagnetic waves led Maxwell to conclude that light itself is electro magnetic wave ?

asked Aug 22, 2016 by meena.p

1 answer

An E.m wave with poynting vector $6\;walt/m^2$ absorbed by a surface of area $12\;m^2$ Find the force on the surface .

asked Aug 22, 2016 by meena.p

1 answer

The magnetic field of a beam emerging from a filter facing a flood light is given by $B = 12 \times 10^{-8} \sin (1.20 \times 10^7\;z -3.60 \times 10^{15}t)T$ What is the average intensity of the beam ?

asked Aug 22, 2016 by meena.p

1 answer

Electromagnetic wave with wave length $\lambda$ is used to improve visibillity in runways during fog and most condition

asked Aug 20, 2016 by meena.p

1 answer

Electromagnetic wave with wave length $\lambda$ is used to detect leakage of oil in underground pipe lines

asked Aug 20, 2016 by meena.p

1 answer

Electromagnetic wave with wave length $\lambda$ is used to kill germs in water purifier

asked Aug 20, 2016 by meena.p

1 answer

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