JEE Main 2015 (Online) 11th April Morning Slot | Electromagnetic Waves Question 6 | Physics

JEE Main 2015 (Online) 11th April Morning Slot

MCQ (Single Correct Answer)

-1

For plane electromagnetic waves propagating in the z direction, which one of the following combination gives the correct possible direction for $$\overrightarrow E $$ and $$\overrightarrow B $$ field respectively ?

$$\left( {\widehat i + 2\widehat j} \right)\,\,$$ and $$\left( {2\widehat i - \widehat j} \right)$$

$$\left(-\, {2\widehat i - 3\widehat j} \right)$$ and $$\left( {3\widehat i - 2\widehat j} \right)$$

$$\left( {2\widehat i + 3\widehat j} \right)$$ and $$\left( {\widehat i + 2\widehat j} \right)$$

$$\left( {3\widehat i + 4\widehat j} \right)$$ and $$\left( {4\widehat i - 3\widehat j} \right)$$

JEE Main 2015 (Online) 10th April Morning Slot

MCQ (Single Correct Answer)

-1

An electromagnetic wave travelling in the x-direction has frequency of 23 $$ \times $$ 10¹⁴ Hz and electric field amplitude of 27 Vm^$$-$$1. From the options given below, which one describes the magnetic field for this wave ?

$$\overrightarrow B $$ (x, t) = (3 $$ \times $$ 10^$$-$$8T) $$\widehat j$$

sin [ 2$$\pi $$ (1.5 $$ \times $$ 10^$$-$$8x $$-$$ 2 $$ \times $$ 10¹⁴t)]

$$\overrightarrow B $$ (x, t) = (9 $$ \times $$ 10^$$-$$8T) $$\widehat k$$

sin [ 2$$\pi $$ (1.5 $$ \times $$ 10^$$-$$6x $$-$$ 2 $$ \times $$ 10¹⁴t)]

$$\overrightarrow B $$ (x, t) = (9 $$ \times $$ 10^$$-$$8T) $$\widehat i$$

sin [ 2$$\pi $$ (1.5 $$ \times $$ 10^$$-$$8x $$-$$ 2 $$ \times $$ 10¹⁴t)]

$$\overrightarrow B $$ (x, t) = (9 $$ \times $$ 10^$$-$$8T) $$\widehat j$$

sin [(1.5 $$ \times $$ 10^$$-$$6 x $$-$$ 2 $$ \times $$ 10¹⁴t)]

JEE Main 2025 (Online) 7th April Evening Shift

MCQ (Single Correct Answer)

-1

The unit of $\sqrt{\frac{2I}{\varepsilon_0 c}}$ is :

(I = intensity of an electromagnetic wave, c = speed of light)

NC^-1

JEE Main 2025 (Online) 29th January Evening Shift

MCQ (Single Correct Answer)

-1

A plane electromagnetic wave propagates along the + x direction in free space. The components of the electric field, $\vec{E}$ and magnetic field, $\vec{B}$ vectors associated with the wave in Cartesian frame are

$E_x, B_y$

$E_y, B_x$

$E_y, B_z$

$E_z, B_y$

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