MCQ
An antenna behaves as resonant circuit only when its length is
- A$\frac{\lambda }{2}$
- B$\frac{\lambda }{4}$
- C$\lambda$
- ✓$\frac{\lambda }{2}$ or integral multiple of $\frac{\lambda }{2}$
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$1^{st}$ Way : By using spring of smaller torsion constant.
$2^{nd}$ Way : By using a smaller coil
$3^{rd}$ Way : By using a stronger magnet
$4^{th}$ Way : By using a coil having fewer number of turns.