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
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

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
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

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
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

A lamp radiates power P0 uniformly in all directions. The amplitude of electric field strength E0 at a distance r from it is:

1. E0=P02πε0cr2

2. E0=P02πε0cr2

3. E0=P04πε0cr2 

4. E0=P08πε0cr

Subtopic:  Properties of EM Waves |
 62%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

The intensity of visible radiation at a distance of 1 m from a bulb of 100 W which converts only 5% of its power into light, is:

1. 0.4 W/m2

2. 0.5 W/m2

3. 0.1 W/m2

4. 0.01 W/m2

Subtopic:  Properties of EM Waves |
 58%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

On an EM wave, the amplitude of electric and magnetic fields are 100 v/m and 0.265 A/m.  The maximum energy flow is

(1) 26.5 W/m2           (2) 46.7 W/m2

(3) 66.5 W/m2            (4) 86.5 W/m2

Subtopic:  Properties of EM Waves |
 61%
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints

The most penetrating radiation out of the following is: 

(1) X-rays        (2) β-rays            (3) α-rays           (4) γ-rays

Subtopic:  Properties of EM Waves |
 77%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Which of the following statements about electromagnetic waves is/are correct:

A. X-rays in vacuum travel faster than light waves in vacuum.
B. The energy of an X-ray photon is greater than that of a light photon.
C. Light can be polarised but X-ray cannot.

1. A and B 
2. B and C
3. A, B and C
4. B only

Subtopic:  Electromagnetic Spectrum |
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links

The magnetic field in a plane EM wave traveling in the positive x-direction is given by 

B=(100μT) sin [(2×1015s-1)(t-x/c)]j^

The equation for electric field is :

1. E=100sin [(2×1015s-1)(t-x/c)]-k^

2. E=(3×1010 μV/m)sin [(2×1015s-1)(t-x/c)]-k^

3. E=3×1010sin [(2×1015s-1)(t-x/c)] k^

4. E=100sin [(2×1015s-1)(t-x/c)] k^

Subtopic:  Properties of EM Waves |
 60%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Statement I: A changing electric field produces a magnetic field.

Statement II: A changing magnetic field produces an electric field.

(1) If both statement-I and Statement-II are true, and Statement-II is the correct explanation of Statement-I.

(2) If both Statement-I and Statement-II are true but Statement-II is not the correct explanation of Statement-I.

(3) If Statement-I is true but Statement-II is false.

(4) If Statement-I is false but Statement-II is true.

  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
  3. If the assertion is true but the reason is false
  4. If both the assertion and reason are false
Subtopic:  Generation of EM Waves |
 59%
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints