Home
Class 12
PHYSICS
Explain the term 'capacitive reactance'....

Explain the term 'capacitive reactance'.Show graphically the variation of capacitive reactance with frequency of the applied alternating voltage.
An `a.c.` voltage `E=E_(0) sin omegat` is applied a across a pure capacitor `C`.Show mathematically that the current flowing through it leads the applied voltage by a phase angle of `pi//2`

Text Solution

AI Generated Solution

### Step-by-Step Solution **Step 1: Define Capacitive Reactance** Capacitive reactance (denoted as \( X_C \)) is the opposition that a capacitor offers to the flow of alternating current (AC). It is defined mathematically as: \[ X_C = \frac{1}{\omega C} ...
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • ALTERNATING CURRENT

    RESONANCE ENGLISH|Exercise A.L.P|10 Videos

  • ALTERNATING CURRENT

    RESONANCE ENGLISH|Exercise EXAMPLE|40 Videos

  • ALTERNATING CURRENT

    RESONANCE ENGLISH|Exercise Exercise -3 Part-2|3 Videos

  • ATOMIC PHYSICS

    RESONANCE ENGLISH|Exercise Advanved level problems|17 Videos

Similar Questions

Explore conceptually related problems

Explain the term 'inductive reactance'.Show graphically the variation of inductive reactance with frequency of the applied alternating voltage. An a.c. voltage E=E_(0)sin omegat is applied across a pure inductor L .Show mathematically that the current flowing through it lags behind the applied voltage by a phase angle of pi//2 .

A small signal voltage V(t)=V_(0)sin omegat is applied across an ideal capacitor C :

An alternating voltage E=E_0 sin omega t , is applied across a coil of inductor L. The current flowing through the circuit at any instant is

Prove that the current flowing through an ideal inductor connected across a.c. source, lags the voltage in phase by pi/2 .

(a) Draw graphs showing the variations of inductive reactnace and capacitive reactance with frequency of the applied ac source . (b) Draw the phasor diagram for a series RC circuit connected to an ac source. (c ) An alternating voltage of 220 V is applied across a device X , a current of 0.25 A flows , which lag behind the applied voltage in phase by (pi)/(2) radian . If the same voltage is applied across another device Y , the same current flows but now it is in phase with the applied voltage . (i) Name the devices X and Y. (ii) Calculate the current flowing in the circuit when the same voltage is applied across the series combination of X and Y.

An alternating voltage given by E = 280 sin 50 pi t is connected across a pure resistor of 40 ohm. Find frequency of source and rms current through the bulb.

An alternating voltage given by V=70 sin 100 pi t is connected across a pure resistor of 25 Omega. Find (i) the frequency of the source. (ii) the rms current through the resistor.

An alternating voltage given as, V=100sqrt(2)sin100t V is applied to a capacitor of 1muF . The current reading of the ammeter will be equal to ................ mA.

An Ac voltage V=V_0 sin 100t is applied to the circuit, the phase difference between current and voltage is found to be pi/4 , then .

An Ac voltage V=V_0 sin 100t is applied to the circuit, the phase difference between current and voltage is found to be pi/4 , then .

Home
Profile