Question

The length of the most effective transmitting antenna is equal to one-fourth the wavelength of the broadcast wave. If a radio station has an antenna 4.5 m long then what is the broadcast frequency of the radio station?

• A. 1.5 × 10^-8 HZ
• B. 6.0 × 10^-8 HZ
• C. 1.7 × 10⁷ HZ
• D. 6.7 × 10^-7 HZ

Answer 1

The correct option is C

1.7 × 10⁷ HZ

$l=\frac{\lambda }{4}4l=\lambda 4l=\frac{c}{\gamma }\gamma =\frac{c}{4l}$