Class 12 Physics
CBSE and UP Board
Alternating Current
Chapter-7 Exercise 7.7
NCERT Solutions for Class 12 Physics Chapter 7 Question 7
A charged 30μF capacitor is connected to a 27 mH inductor. What is the angular frequency of free oscillations of the circuit?
Share
Capacitance, C = 30μF = 30 x 10⁻6F
Inductance, L = 27 mH = 27 x 10-3 H
Angular frequency is given as:
ωr = 1 /√(LC) = 1/√ ( 27 x 10-3 x 30 x 10⁻6 )
= 1/ (9 x 10⁻⁴ ) rad/s
= 1.11 x 10³ rad/s
Hence ,the angular frequency of free oscillations of the circuit is 1.11 x 10³ rad/s