The X-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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A wave is propagating in a medium of electric dielectric constant 2 and relative magnetic permeability 50. The wave impedance of such a medium is

(1) 5 Ω

(2) 376.6 Ω

(3) 1883 Ω

(4) 3776 Ω

Subtopic:  Properties of EM Waves |
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Displacement current is the same as:

1. Conduction current due to the flow of free electrons
2. Conduction current due to the flow of positive ions
3. Conduction current due to the flow of both positive and negative free charge carriers
4. It is not a conduction current but is caused by the time-varying electric field
Subtopic:  Displacement Current |
 55%
From NCERT
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The maxwell's equation:

B.dl=μ0i+ε0.dϕEdt is a statement of :

(1) Faraday's law of induction

(2) Modified Ampere's law

(3) Gauss's law of electricity

(4) Gauss's law of magnetism

Subtopic:  Maxwell's Equations |
 84%
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The charge of a parallel plate capacitor is varying as q=q0sinωt. Find the magnitude of displacement current through the capacitor. 
(Plate Area = A, separation of plates = d)

1. q0cos(ωt)

2. q0ωsin ωt

3. q0ωcosωt

4. q0Aωdcosωt

Subtopic:  Displacement Current |
 72%
From NCERT
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An electromagnetic wave is propagating along Y-axis. Then:

(1) The oscillating electric field is along X-axis and the oscillating magnetic field is along Y-axis.

(2) The oscillating electric field is along Z-axis and the oscillating magnetic field is along X-axis.

(3) Both oscillating electric and magnetic fields are along Y-axis, but the phase difference between them is 90°

(4) Both oscillating electric and magnetic fields are mutually perpendicular in arbitrary directions.

Subtopic:  Properties of EM Waves |
 76%
From NCERT
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In electromagnetic wave the phase difference between electric and magnetic field vectors E and B is:

1. 0

2. π/2

3. π

4. π/4

Subtopic:  Properties of EM Waves |
 66%
From NCERT
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An electromagnetic wave going through the vacuum is described by E=E0sin(kx-ωt).

Which is the following is/are independent of the wavelength?

1. \(k\) 2. \(k \over \omega\)
3. \(k \omega\) 4. \( \omega\)
Subtopic:  Properties of EM Waves |
 53%
From NCERT
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In a plane E.M. wave, the electric field oscillates sinusoidally at a frequency of 2.5 ×1010 Hz and amplitude 480 V/m.  The amplitude of the oscillating magnetic field will be:

1. 1.52×10-8 Wb/m2

2. 1.52×10-7 Wb/m2

3. 1.6×10-6 Wb/m2

4. 1.6×10-7 Wb/m2

Subtopic:  Properties of EM Waves |
 74%
From NCERT
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The energy density of the electromagnetic wave in vacuum is given by the relation:

1. 12.E2ε0+B22μ0 

2. 12ε0E2+12μ0B2

3. E2+B2C

4. 12ε0E2+B22μ0

Subtopic:  Properties of EM Waves |
 78%
From NCERT
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