Forced oscillations are those in which an object oscillates under the influence of an external periodic force. Students of class 12 Physics can understand the typical term related to forced oscillations. An important term to remember when learning about forced oscillations is resonance. Resonance occurs when the frequency of the external force is equal to the natural frequency of the oscillator. At this time frequency is known as the resonant frequency. In class 11 Physics chapter 13, all the derivations related to forced oscillations are given with suitable example.