Verified Solution • 2025–26 Session moderate

QJEEM22Phfadd: JEE Main 2022 Physics - Class 12 JEEM22Phfadd Solution: An antenna is placed in a dielectric medium of dielectric…

An antenna is placed in a dielectric medium of dielectric constant 6.25. If the maximum size of that antenna is 5.0 mm, it can radiate a signal of minimum frequency of __________ GHz.

(Given μ\mu r = 1 for dielectric medium)

Step-by-Step Verified Solution

We know that v = f λ\lambda

Putting the values,

3×1086.25=f×20×10−3{{3 \times {{10}^8}} \over {\sqrt {6.25} }} = f \times 20 \times {10^{ - 3}}

⇒f=6×109\Rightarrow f = 6 \times {10^9} Hz

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