JEE Main 2023 (Online) 25th January Morning Shift | Electromagnetic Waves Question 42 | Physics

1

JEE Main 2023 (Online) 25th January Morning Shift

MCQ (Single Correct Answer)

+4

-1

An electromagnetic wave is transporting energy in the negative $$z$$ direction. At a certain point and certain time the direction of electric field of the wave is along positive $$y$$ direction. What will be the direction of the magnetic field of the wave at that point and instant?

A

Negative direction of $$y$$

B

Positive direction of $$z$$

C

Positive direction of $$x$$

D

Negative direction $$x$$

2

JEE Main 2023 (Online) 24th January Evening Shift

MCQ (Single Correct Answer)

+4

-1

The electric field and magnetic field components of an electromagnetic wave going through vacuum is described by

$$\mathrm{{E_x} = {E_o}\sin (kz - \omega t)}$$

$$\mathrm{{B_y} = {B_o}\sin (kz - \omega t)}$$

Then the correct relation between E$$_0$$ and B$$_0$$ is given by

A

$$\mathrm{{E_o}{B_o} = \omega k}$$

B

$$\mathrm{{E_0} = k{B_0}}$$

C

$$\mathrm{k{E_0} = \omega {B_0}}$$

D

$$\mathrm{\omega {E_0} = k{B_0}}$$

3

JEE Main 2023 (Online) 24th January Morning Shift

MCQ (Single Correct Answer)

+4

-1

In $$\overrightarrow E $$ and $$\overrightarrow K $$ represent electric field and propagation vectors of the EM waves in vacuum, then magnetic field vector is given by :

($$\omega$$ - angular frequency) :

A

$${1 \over \omega }\left( {\overline K \times \overline E } \right)$$

B

$$\overline K \times \overline E $$

C

$$\omega \left( {\overline K \times \overline E } \right)$$

D

$$\omega \left( {\overline E \times \overline K } \right)$$

4

JEE Main 2022 (Online) 29th July Morning Shift

MCQ (Single Correct Answer)

+4

-1

Match List - I with List - II :

	List - I		List - II
(a)	UV rays	(i)	Diagnostic tool in medicine
(b)	X-rays	(ii)	Water purification
(c)	Microwave	(iii)	Communication, Radar
(d)	Infrared wave	(iv)	Improving visibility in foggy days

Choose the correct answer from the options given below :

A

(a)-(iii), (b)-(ii), (c)-(i), (d)-(iv)

B

(a)-(ii), (b)-(i), (c)-(iii), (d)-(iv)

C

(a)-(ii), (b)-(iv), (c)-(iii), (d)-(i)

D

(a)-(iii), (b)-(i), (c)-(ii), (d)-(iv)