12th Class Physics Sample Paper Physics Sample Paper-6

  • question_answer
    Rajveer switched On his radio set to listen his favourite music. But he found that the reception was not clear. Apart from that, there was overlapping of signals. Then, he had to adjust the tuner in the set to hear crisp and clear music.
    (i) Name the components of the tuner in the radio set. Also, write the component that was changed to adjust the tunes.
    (ii) Give reason, why the tuner was adjusted.
    (iii) Write the value that can be associated with the phenomenon involved in the adjustment of the tuner.


    (i) The components in the tuner in the radio set are :
    (a) Inductor of inductance L
    (b) Capacitor of capacitance C
    Capacitance was changed to obtain the desired frequency, as frequency, \[v=\frac{1}{2\pi \sqrt{LC}}\]
    (ii) The tuner was adjusted so as to obtain resonance in L-C circuit.
    (iii) Harmony with the nature can makes life peaceful.

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