The sun delivers 104 W/m2 of electromagnetic flux to the earth's surface. The total power that is incident on a roof of dimensions (10×10) m2 will be

(1) 104 W

(2) 105 W

(3) 106 W

(4) 107 W

Subtopic:  Electromagnetic Spectrum |
 85%
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

The wave of wavelength 5900 A0 emitted by any atom or molecule must have some finite total length which is known as coherence length. For sodium light, this length is 2.4 cm. The number of oscillations in this length will be

(1) 4.068×108

(2) 4.068×104

(3) 4.068×106

(4) 4.068×105

Subtopic:  Properties of EM Waves |
 64%
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

The transmitting antenna of a radio station is mounted vertically. At a point 10 km due north of the transmitter, the peak electric field is 10-3 V/m. The amplitude of the radiated magnetic field is

(1) 3.33×10-10 T

(2) 3.33×10-12 T

(3) 10-3 T

(4) 3×105 T

Subtopic:  Properties of EM Waves |
 76%
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

A circular ring of radius r is placed in a homogeneous magnetic field perpendicular to the plane of the ring. The field B changes with time according to the equation B = Kt, where K is a constant and t is the time. The electric field in the ring is

(1) Kr4

(2) Kr3

(3) Kr2

(4) K2r

Subtopic:  Generation of EM Waves |
 68%
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

A plane EM-wave of wave intensity of 10 W/m2 strikes a small mirror of area 20 cm2, held perpendicular to the approaching wave. The radiation force on the mirror will be

(1) 6.6×10-11 N

(2) 1.33×10-11 N

(3) 1.33×10-10 N

(4) 6.6×10-10 N

Subtopic:  Properties of EM Waves |
 54%
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints

In a region of free space, the electric field at some instant of time is E=(80i^+32j^-64k^)V/m and the magnetic field is B=(0.2i+0.08j^+0.29k^)μT. The Poynting vector for these fields is-

(1) -11.52i^+28.8j^

(2) -28.8i^+11.52i^

(3) 28.8i^-11.52j^

(4) 11.52i^-28.8j^

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

A plane electromagnetic wave propagating in the x-direction has wavelength of 60 mm. The electric field is in the y-direction and its maximum magnitude is 33 V/m-1. The equation for the electric field as function of x and t is

(1) 11 sin π(t - x/c)

(2) 33 sin π×1010 (t - x/c)

(3) 33 sin π(t - x/c)

(4) 11 sin π×1011(t - x/c)

Subtopic:  Properties of EM Waves |
 73%
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

The magnetic field in a plane electromagnetic wave is given by

Bz=2×10-7 sin (0.5×103x-1.5×1011t) Tesla

The expression for the electric field will be:

1. \(E_z=30 \sqrt{2} \sin \left(0.5 \times 10^3 x-1.5 \times 10^{11} t\right) V / m\)
2. \(E_z=60 \sin \left(0.5 \times 10^3 x-1.5 \times 10^{11} t\right) V / m\)
3. \(E_y=30 \sqrt{2} \sin \left(0.5 \times 10^{11} x-1.5 \times 10^3 t\right) V / m\)
4. \(E_y=60 \sin \left(0.5 \times 10^3 x-1.5 \times 10^{11} t\right) V / m\)

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 parallel plate capacitor with plate area A and separation between the plates d, is charged by a constant current i.  Consider a plane surface of area A/2 parallel to the plates and drawn symmetrically between the plates. The displacement current through this area is

(1) i

(2) i/2

(3) i/4

(4) i/8

Subtopic:  Maxwell's Equations |
 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

A larger parallel plate capacitor, whose plates have an area of 1 m2 are separated from each other by 1 mm, is being charged at a rate of 25.8 V/s. If the plates has dielectric constant 10, then the displacement current at this instant is

(1) 25 μA

(2) 11 μA

(3) 2.2 μA

(4) 1.1 μA

Subtopic:  Maxwell's Equations |
 75%
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