TG EAPCET 2025 (Online) 2nd May Morning Shift | Electromagnetic Waves Question 4 | Physics

The dielectric constant of a medium is 8 and its relative permeability is 200 . If an electromagnetic wave of frequency 100 MHz travels in this medium, then its wavelength is

15 m

15 cm

7.5 m

7.5 cm

TG EAPCET 2024 (Online) 10th May Morning Shift

MCQ (Single Correct Answer)

-0

If the peak value of the magnetic field of an electromagnetic wave is $30 \times 10^{-9} \mathrm{~T}$, then the peak value of the electric field is

$3 \mathrm{Vm}^{-1}$

$12 \mathrm{Vm}^{-1}$

$6 \mathrm{Vm}^{-1}$

$9 \mathrm{Vm}^{-1}$

TG EAPCET 2024 (Online) 9th May Evening Shift

MCQ (Single Correct Answer)

-0

A plane electromagnetic wave of electric and magnetic fields $E_0$ and $B_0$ respectively incidents on a surface. If the total energy transferred to the surface in a time of $t$ is $U$, then the magnitude of the total momentum delivered to the surface for complete absorption is

$\frac{U E_0}{B_0}$

$\frac{U B_0}{E_0}$

$\frac{U_0}{E_0 B_0}$

$\frac{U B_0}{E_0^2}$

TG EAPCET 2024 (Online) 9th May Morning Shift

MCQ (Single Correct Answer)

-0

If the amplitude of the magnetic field part of a harmonic electromagnetic wave in vacuum is 270 nT , the amplitude of the electric field part of the wave is

$90 \mathrm{NC}^{-1}$

$81 \mathrm{NC}^{-1}$

$9 \mathrm{NC}^{-1}$

$30 \mathrm{NC}^{-1}$

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