In the circuit shown below R represents an electric bulb. If the frequency `(v=omega/(2pi))`of the supply is doubled, how should the value of C and L should be changed so that the glow of bulb remains unchnged?

An electric bulb marked 40W-200 V is used in a circuit of supply voltage 100V. Now its power is

A series LCR circuit with R= 20 Omega ,L=1.5H and C = 35 muF is connected to a variable-frequency 200 V ac 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?

A series LCR circuit with R = 20Omega (Ohm), L = 1,5H (Henry) and C= 35muF (Micro farad) is connected to a variable frequency 200 V (Volt) 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 ?

LCR circuit connected to a variable frequency 230 V source . L=5.0 H, C=80 micro F and R=40 ohm. Keeping the source frequency equal to the resonating frequency of the series LCR circuit, if the three elements, L, C and R are arranged in parallel, show that the total current in the parallel LCR circuit is minimum at this frequency. Obtain the current rms value in each branch of the circuit for the elements and source.

The diode used in the circuit shown in the adjacent figure has a constant voltage drop of 0.5V at all currents and a maximum power rating of 100mW.What should be the value of resistor R connected in series with the diode for obtaining maximum current?

In an LCR-circuit, capacitance is changed from C to 2 C. For the resonant frequency to remain unchanged, the inductance should be changed form L to

In the circuit shown in Fig.a voltage V is connected across lamp L. What changes would occur at lamp and the voltage V, if the resistance R is reduced in value?

An capacitor C, a variable resistor R and a bulb B are connected in series to the ac mains in circuits as shown in Fig. The bulb glows with some brightness. How will the glow of the bulb change if the resistance R is increased keeping the same capacitance.