NEET 2025 | Electromagnetic Waves Question 1 | Physics

The electric field in a plane electromagnetic wave is given by $$ E_z=60 \cos \left(5 x+1.5 \times 10^9 t\right) \mathrm{V} / \mathrm{m}$$ Then expression for the corresponding magnetic field is (here subscripts denote the direction of the field) :

$B z=60 \cos \left(5 x+1.5 \times 10^9 t\right) T$

$B_y=60 \sin \left(5 x+1.5 \times 10^9 t\right) T$

$B_y=2 \times 10^{-7} \cos \left(5 x+1.5 \times 10^9 t\right) T$

$B_x=2 \times 10^{-7} \cos \left(5 x+1.5 \times 10^9 t\right) T$

NEET 2024 (Re-Examination)

MCQ (Single Correct Answer)

-1

The electromagnetic radiation which has the smallest wavelength are

X-rays

Gamma rays

Ultraviolet rays

Microwaves

NEET 2024 (Re-Examination)

MCQ (Single Correct Answer)

-1

If the ratio of relative permeability and relative permittivity of a uniform medium is $$1: 4$$. The ratio of the magnitudes of electric field intensity $$(E)$$ to the magnetic field intensity $$(H)$$ of an EM wave propagating in that medium is (Given that $$\sqrt{\frac{\mu_0}{\varepsilon_0}}=120 \pi$$):

$$30 \pi: 1$$

$$1: 120 \pi$$

$$60 \pi: 1$$

$$120 \pi: 1$$

NEET 2024

MCQ (Single Correct Answer)

-1

The property which is not of an electromagnetic wave travelling in free space is that:

They are transverse in nature

The energy density in electric field is equal to energy density in magnetic field

They travel with a speed equal to $$\frac{1}{\sqrt{\mu_0 \varepsilon_0}}$$

They originate from charges moving with uniform speed

NEET Subjects

Biology

Zoology

Human Health and Diseases Body Fluids and Its Circulation Locomotion and Movement Neural Control and Coordination Reproduction in Organisms Reproductive Health Structural Organisation in Animals Digestion and Absorption Excretory Products and Their Elimination Chemical Coordination and Integration Human Reproduction Animal Kingdom Breathing and Exchange of Gases Evolution