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Draw the effective equivalent circuit of the circuit shown in Fig , at very high frequencies and find the effective

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

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Study the circuits (a) and (b) shown in Fig and answer the following questions. Under which conditions would the rms currents in the two circuits be the

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

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Study the circuits (a) and (b) shown in Fig and answer the following questions. Can the rms current in circuit (b) be larger than that in

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

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Can the instantaneous power output of an ac source ever be negative? Can the average power output be

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

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In series LCR circuit, the plot of `I_max VS ω` is shown in Fig . Find the bandwidth and mark in the

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

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How does the sign of the phase angle φ, by which the supply voltage leads the current in an LCR series circuit, change as the supply frequency is gradually increased from very low to very high

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

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A device ‘X’ is connected to an a.c source. The variation of voltage, current and power in one complete cycle is shown in Fig . Which curve shows power consumption over a full

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

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A device ‘X’ is connected to an a.c source. The variation of voltage, current and power in one complete cycle is shown in Fig . What is the average power consumption over a

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

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A device ‘X’ is connected to an a.c source. The variation of voltage, current and power in one complete cycle is shown in Fig . Identify the

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

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Both alternating current and direct current are measured in amperes. But how is the ampere defined for an alternating

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

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A coil of 0.01 henry inductance and 1 ohm resistance is connected to 200 volt, 50 Hz ac supply. Find the impedance of the circuit and time lag between max. alternating voltage and

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

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A 60 W load is connected to the secondary of a transformer whose primary draws line voltage. If a current of 0.54 A flows in theload, what is the current in the primary coil? Comment on the type of transformer being

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

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Explain why the reactance provided by a capacitor to an alternating current decreases with increasing

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Explain why the reactance offered by an inductor increases with increasing frequency of an alternating

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An electrical device draws 2kW power from AC mains (voltage223V (rms) = `sqrt50,000` V).The current differs (lags) in phase by `φ tan φ=-3/4` as compared to voltage. Find

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

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An electrical device draws 2kW power from AC mains (voltage223V (rms) = `sqrt50,000` V).The current differs (lags) in phase by `φ tan φ=-3/4` as compared to voltage. Find `X_C –

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

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An electrical device draws 2kW power from AC mains (voltage223V (rms) = `sqrt50,000` V).The current differs (lags) in phase by `φ tan φ=-3/4` as compared to voltage. Find I M. Another device has twice the values for R, XC and XL. How are the answers

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

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1MW power is to be delivered from a power station to a town 10 km away. One uses a pair of Cu wires of radius 0.5 cm for this purpose. Calculate the fraction of ohmic losses to power transmitted if power is transmitted at 220V. Comment on the feasibility

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

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1MW power is to be delivered from a power station to a town 10 km away. One uses a pair of Cu wires of radius 0.5 cm for this purpose. Calculate the fraction of ohmic losses to power transmitted if a step-up transformer is used to boost the voltage

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

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Consider the LCR circuit shown in Fig . Find the net current i and the phase of i. Show that ` I=Z/V` . Find the impedence Z for this

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

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