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A parallel plate capacitor is charged by connecting it to a battery through a resistor. If i is the current in the circuit, then in the gap between the plates:

1. A displacement current of magnitude equal to i flows in the same direction as i.
2. A displacement current of magnitude equal to i flows in the opposite direction to i.
3. A displacement current of magnitude greater than i flows but it can be in any direction.
4. There is no current.
Subtopic:  Displacement Current |
 63%
From NCERT
NEET - 2024
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The property which is not of an electromagnetic wave travelling in free space is that:
1. the energy density in electric field is equal to energy density in magnetic field.
2. they travel with a speed equal to 1μ0 ε0.
3. they originate from charges moving with uniform speed.
4. they are transverse in nature.
Subtopic:  Properties of EM Waves |
 67%
From NCERT
NEET - 2024
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If E and B represent the electric field vector and magnetic field vector, respectively, in an electromagnetic wave then the direction of EM wave is along:
1. E
2. B
3. E×B
4. B×E
Subtopic:  Properties of EM Waves |
 91%
From NCERT
NEET - 2024
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Match List-I with List-II (the symbols carry their usual meaning).
List-I List-II
A. EdA=Qε0 I. Ampere-Maxwell's law
B. BdA=0 II. Faraday's law
C. Edl=d(ϕ)dt III. Gauss's law of electrostatics
D. Bdl=μ0ic+μ0ε0d(ϕE)dt IV. Gauss's law of magnetism

Choose the correct answer from the options given below:
1. A-III, B-IV, C-II, D-I
2. A-IV, B-III, C-II, D-I
3. A-III, B-II, C-IV, D-I
4. A-IV, B-I, C-III, D-II
Subtopic:  Maxwell's Equations |
 84%
From NCERT
NEET - 2024
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Among the various types of electromagnetic radiation, the one with the smallest wavelength is:
1. X-rays 2. Gamma rays
3. Ultraviolet rays 4. Microwaves
Subtopic:  Electromagnetic Spectrum |
 79%
From NCERT
NEET - 2024
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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 thatμ0ε0=120π)
1. 30π:1
2. 1:120π
3. 60π:1
4. 120π:1
Subtopic:  Properties of EM Waves |
From NCERT
NEET - 2024
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In a plane electromagnetic wave travelling in free space, the electric field component oscillates sinusoidally at a frequency of 2.0×1010 Hz and amplitude 48 Vm1. Then the amplitude of the oscillating magnetic field is: (Speed of light in free space 3×108 ms1)
1. 1.6×106 T
2. 1.6×109 T
3. 1.6×108 T
4. 1.6×107 T
Subtopic:  Properties of EM Waves |
 61%
From NCERT
NEET - 2023
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ε0 and μ0 are the electric permittivity and magnetic permeability of free space respectively. If the corresponding quantities of a medium are 2ε0 and 1.5μ0 respectively, the refractive index of the medium will nearly be:
1. 2
2. 3
3. 3
4. 2
Subtopic:  Properties of EM Waves |
 80%
From NCERT
NEET - 2023
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To produce an instantaneous displacement current of 2 mA in the space between the parallel plates of a capacitor of capacitance 4 μF, the rate of change of applied variable potential difference (dVdt) must be:
1. 800 V/s
2. 500 V/s
3. 200 V/s
4. 400 V/s
Subtopic:  Displacement Current |
 79%
From NCERT
NEET - 2023
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Match List I with List II.
List - I (Electromagnetic waves) List - II (Wavelength)
(a) AM radio waves (i) 1010 m
(b) Microwaves (ii) 102 m
(c) Infrared radiation (iii) 102 m
(d) X-rays (iv) 104 m
Choose the correct answer from the options given below:
(a) (b) (c) (d)
1. (ii) (iii) (iv) (i)
2. (iv) (iii) (ii) (i)
3. (iii) (ii) (i) (iv)
4. (iii) (iv) (ii) (i)
Subtopic:  Electromagnetic Spectrum |
 73%
From NCERT
NEET - 2022
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