The \(X\text-\)ray beam can be deflected by:
1. Magnetic field 2. Electric field
3. Both 1 and 2 4. None of these

Subtopic:  Electromagnetic Spectrum |
From NCERT
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Maxwell's equation describes the fundamental laws of:

1. Electricity only
2. Magnetism only
3. Mechanics only
4. Both (1) and (2) 

Subtopic:  Maxwell's Equations |
 94%
From NCERT
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The energy of the EM wave is of the order of \(15\) KeV. To which part of the spectrum does it belong?
1. X-rays
2. Infrared rays
3. Ultraviolet rays
4. Y-rays

Subtopic:  Electromagnetic Spectrum |
 57%
From NCERT
NEET - 2015
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The electric field associated with an electromagnetic wave in vacuum is given by \(E=40 \cos \left(k z-6 \times 10^8 t\right)\), where \(E\), \(z\), and \(t\) are in volt/m, meter, and second respectively. The value of the wave vector \(k\) would be:
1. \(2~\text{m}^{-1}\)
2. \(0.5~\text{m}^{-1}\)
3. \(6~\text{m}^{-1}\)
4. \(3~\text{m}^{-1}\)     

Subtopic:  Properties of EM Waves |
 74%
From NCERT
NEET - 2012
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The electric and the magnetic field, associated with an electromagnetic wave, propagating along the \(+z\text-\)axis, can be represented by:
1. \(\left[{E}={E}_0 \hat{k}, {B}={B}_0 \hat{i}\right]\)
2. \(\left[E={E}_0 \hat{j}, ~{B}={{B}_0} \hat{j}\right]\)
3. \(\left[{E}={E}_0 \hat{j}, ~{B}={B}_0 \hat{k}\right]\)
4. \(\left[{E}={E}_0 \hat{i}, ~{B}={{B}_0} \hat{j}\right]\)
Subtopic:  Properties of EM Waves |
 84%
From NCERT
NEET - 2011
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The electric field of an electromagnetic wave in free space is given by \(\overrightarrow E = 10\cos(10^7t+kx)\hat j ~\text{V/m}, \) where \(t\) and \(x\) are in seconds and meters respectively. It can be inferred that:
1. The wavelength \(\lambda\) is \(188.4~\text{m}\).
2. The wave number \(k\) is \(0.33~\text{rad/m}.\)
3. The wave amplitude is \(10~\text{V/m}\).
4. The wave is propagating along \(+x\) direction

Which one of the following pairs of statements is correct?
1. (3) and (4)
2. (1) and (2)
3. (2) and (3)
4. (1) and (3)

Subtopic:  Properties of EM Waves |
 56%
From NCERT
NEET - 2010
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The velocity of electromagnetic radiation in a medium of permittivity \(\varepsilon_0\) and permeability \(\mu_0\) is given by:
1. \(\sqrt{\frac{\varepsilon_{0}}{\mu_{0}}}\)
2. \(\sqrt{\mu_0 \varepsilon_0}\)
3. \(\frac{1}{\sqrt{\mu_0 \varepsilon_0}}\)
4. \(\sqrt{\frac{\mu_{0}}{\varepsilon_{0}}}\)

Subtopic:  Properties of EM Waves |
 92%
From NCERT
NEET - 2008
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An EM wave is propagating in a medium with a velocity \(\overrightarrow{{v}}={v} \hat{i}\). The instantaneous oscillating electric field of this EM wave is along the \(+y\) axis. The direction of the oscillating magnetic field of the EM wave will be along:
1. \(-z \text-\)direction
2. \(+z \text-\)direction
3. \(-y \text-\)direction
4. \(+y \text-\)direction

Subtopic:  Properties of EM Waves |
 81%
From NCERT
NEET - 2018
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In an electromagnetic wave in free space, the root mean square value of the electric field is \(E_{\text{rms}} = 6~\text{V/m}\). The peak value of the magnetic field is:
1. \(2.83\times 10^{-8}~\text{T}\)
2. \(0.70\times 10^{-8}~\text{T}\)
3. \(4.23\times 10^{-8}~\text{T}\)
4. \(1.41\times 10^{-8}~\text{T}\)

Subtopic:  Properties of EM Waves |
 75%
From NCERT
NEET - 2017
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Out of the following options which one can be used to produce a propagating electromagnetic wave?

1. a stationary charge.
2. a chargeless particle.
3. an accelerating charge.
4. a charge moving at constant velocity.

Subtopic:  Generation of EM Waves |
 90%
From NCERT
NEET - 2016
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