Advertisements
Advertisements
प्रश्न
An inductor, a resistance and a capacitor are joined in series with an AC source. As the frequency of the source is slightly increased from a very low value, the reactance
पर्याय
of the inductor increases
of the resistor increases
of the capacitor increases
of the circuit increases
Advertisements
उत्तर
of the inductor increases
The reactance of an inductor is given by,
`X_L = omegaL`
And the reactance of a capacitor is given by,
`Xc = 1/(omegaC)`
Here, ω = 2πf , where f is the frequency of the source. So, when f increases, ω increases.
∴ XL will increase and XC will decrease.
APPEARS IN
संबंधित प्रश्न
The magnetic field energy in an inductor changes from maximum to minimum value in 5.0 ms when connected to an AC source. The frequency of the source is
Show that in an AC circuit containing a pure inductor, the voltage is ahead of current by π/2 in phase.
Obtain if the circuit is connected to a high-frequency supply (240 V, 10 kHz). Hence, explain the statement that at very high frequency, an inductor in a circuit nearly amounts to an open circuit. How does an inductor behave in a dc circuit after the steady state?
If the frequency of an A.C. is made 4 times of its initial value, the inductive reactance will ______.
An inductive circuit contains resistance of 10 ohms and an inductance of 2 henry. If an A.C. voltage of 120 Volts and frequency 60 Hz is applied to this circuit, the current would be nearly ______.
Explain why the reactance offered by an inductor increases with increasing frequency of an alternating voltage.
An ideal inductor is connected across an AC source of voltage. The current in the circuit ______.
What is the ratio of inductive and capacitive reactance in an ac circuit?
The magnetic potential energy stored in a certain inductor is 25 mJ, when the current in the inductor is 60 mA. This inductor is of inductance ______.
A 2 mH inductor is connected to 220 V, 50 Hz AC (X1) and then to DC (X2). Find X1 and X2.
Why does an inductor continuously oppose changes in current?
Why is the integration constant \[C\] taken as \[0\]?
Which sine-form expression gives the current through the pure inductor?
Which expression defines inductive reactance in terms of angular frequency and inductance?
What is the inductive reactance of a pure inductor with \[L=25.0\,\mathrm{mH}\] at \[f=50\,\mathrm{Hz}\]?
Which formula gives the rms current through a pure inductor?
What is the rms current when \[V_{\mathrm{rms}}=220\,\mathrm{V}\] and \[X_L\approx7.85\,\Omega\]?
