Electromagnetic waves are produced by

1. A static charge

2. A moving charge

3. An accelerated charge

4. Charged particles

Concept Questions :-

Generation of EM waves
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

The idea of displacement current was introduced by

1. Maxwell

2. Hertz

3. Marconi

4. Bose

Concept Questions :-

Problem with Ampere's law
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

The direction of propagation of the electromagnetic wave is the same as that of (Here $\stackrel{\to }{E}$=electric field vector and $\stackrel{\to }{B}$=magnetic field vector):

(1) $\stackrel{\to }{E}×\stackrel{\to }{B}$

(2) $\stackrel{\to }{B}×\stackrel{\to }{E}$

(3) $\stackrel{\to }{E}$

(4) $\stackrel{\to }{B}$

Concept Questions :-

Properties of EM waves
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

In a E.M.W, phase difference between $\stackrel{\to }{\mathrm{E}}$ and $\stackrel{\to }{\mathrm{B}}$ is :

1. zero

2. $\mathrm{\pi }/2$

3. $\mathrm{\pi }$

4. $\mathrm{\pi }/3$

Concept Questions :-

Generation of EM waves
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

An electromagnetic radiation has an energy of 13.2 keV. Then, the radiation belongs to the region of

1. visible light

2. ultraviolet

3. infrared

4. X-ray

Concept Questions :-

Electromagnetic spectrum

Difficulty Level:

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

Concept Questions :-

Properties of EM waves
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

If  and ${\mathrm{\lambda }}_{\mathrm{m}}$ represent the wavelengths of visible light, x-rays and microwaves respectively, then-

1.

2.

3.

4.

Concept Questions :-

Electromagnetic spectrum

Difficulty Level:

Which of the following rays are not electromagnetic waves ?

(a) $\mathrm{\gamma }$-rays                  (b) $\mathrm{\beta }$-rays
(c) Heat rays              (d) X-rays

Concept Questions :-

Introduction
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:

The displacement current flows in the dielectric of a capacitor when the potential difference between its plates:-

1.  is changing with time.

2.  is changing with distance.

3.  becomes zero.

4.  has assumed a constant value.

Concept Questions :-

Introduction

Difficulty Level:

Assertion: For cooking in a microwave oven, food is always kept in metal containers

Reason: The energy of microwave is easily transferred to the food in metal container

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

Concept Questions :-

Properties of EM waves