Questions by varun

0 votes

0 answers

If the rms current in a 50 Hz ac circuit is 5 A, the value of the current 1/300 seconds after its value becomes zero

asked Mar 20, 2022 in 12th Physics

0 votes

0 answers

An alternating current generator has an internal resistance Rg and an internal reactance Xg. It is used to supply power to a passive load consisting of a resistance Rg and a reactance XL. For maximum power to be delivered from the generator to the load, the value of XL is equal

asked Mar 20, 2022 in 12th Physics

0 votes

0 answers

When a voltage measuring device is connected to AC mains, the meter shows the steady input voltage of 220V. This

asked Mar 20, 2022 in 12th Physics

0 votes

0 answers

To reduce the reasonant frequency in an LCR series circuit with a

asked Mar 20, 2022 in 12th Physics

0 votes

0 answers

Which of the following combinations should be selected for better tuning of an LCR circuit used for

asked Mar 20, 2022 in 12th Physics

0 votes

0 answers

An inductor of reactance 1 Ω and a resistor of 2 Ω are connected in series to the terminals of a 6 V (rms) a.c. source. The power dissipated in the circuit

asked Mar 20, 2022 in 12th Physics

0 votes

0 answers

The output of a step-down transformer is measured to be 24 V when connected to a 12 watt light bulb. The value of the peak current

asked Mar 20, 2022 in 12th Physics

0 votes

0 answers

As the frequency of an ac circuit increases, the current first increases and then decreases. What combination of circuit elements is most likely to comprise the

asked Mar 20, 2022 in 12th Physics

0 votes

0 answers

In an alternating current circuit consisting of elements in series, the current increases on increasing the frequency of supply. Which of the following elements are likely to constitute the circuit

asked Mar 20, 2022 in 12th Physics

0 votes

0 answers

Electrical energy is transmitted over large distances at high alternating voltages. Which of the following statements is (are)

asked Mar 20, 2022 in 12th Physics

0 votes

0 answers

For an LCR circuit, the power transferred from the driving source to the driven oscillator is `P=I^2

asked Mar 20, 2022 in 12th Physics

0 votes

0 answers

When an AC voltage of 220 V is applied to the capacitor

asked Mar 20, 2022 in 12th Physics

0 votes

0 answers

The line that draws power supply to your house from street

asked Mar 20, 2022 in 12th Physics

0 votes

0 answers

If a LC circuit is considered analogous to a harmonically oscillating spring block system, which energy of the LC circuit would be analogous to potential energy and which one analogous to kinetic

asked Mar 20, 2022 in 12th Physics

0 votes

0 answers

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

0 votes

0 answers

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

0 votes

0 answers

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

0 votes

0 answers

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

0 votes

0 answers

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

0 votes

0 answers

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

Page:

« prev
1
...
7
8
9
10
11
12
13
...
169
next »