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Recent questions tagged electromagnetic waves
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1
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Which one among the following is the correct order of power consumption for light of equal intensity ?
asked
Apr 6, 2019
in
Class 12
by
kratos
electromagnetic waves
class-11
class-9
class-12
gravitation
income determination
+2
votes
1
answer
What is the ratio of velocities of light rays of wavelengths 4000 and 8000 in vacuum?
asked
Apr 6, 2019
in
JEE
by
kratos
electromagnetic waves
spectrum
jee
class-10
icse
jee mains
class-12
+1
vote
1
answer
A point participates simultaneously in two harmonic oscillations of the same direction:
asked
Apr 6, 2019
in
JEE
by
kratos
irodov
electromagnetic waves
oscillations and wave
jee
jee mains
mechanical oscillations
+2
votes
1
answer
Thin ozone layer on top of stratosphere is crucial for human survival. Why?
asked
Apr 5, 2019
in
Class 12
by
kratos
cbse
electronic device
electromagnetic waves
communication systems
class-12
electromagnetic spectrum
+3
votes
1
answer
Distinguish between amplitude modulation and frequency modulation.
asked
Apr 5, 2019
in
Physics
by
kratos
isc
cbse
communication
electromagnetic waves
communication systems
modulation
icse
class-12
contemporary physics
+1
vote
1
answer
The potential difference, VC, across a 3 Farad parallel-plate capacitor whose plates have radius R = 2 cm varies with time and
asked
Apr 5, 2019
in
Class 12
by
kratos
irodov
neet
electrodynamics
electric capacitance
cbse
electromagnetic waves
jee main 2021
electric current
jee
aiims
jee mains
jee main
class-12
+3
votes
1
answer
An electric charge oscillating with a frequency of 1 kilo cycles/* can radiates electromagnetic waves of wavelength
asked
Apr 5, 2019
in
JEE
by
kratos
displacement current
cbse
electromagnetic waves
jee
jee mains
class-12
+3
votes
1
answer
Consider a long straight cylindrical wire with radius R = 0.1 m is carrying the non-uniform current density which points along the axis
asked
Apr 4, 2019
in
JEE
by
kratos
irodov
electrodynamics
cbse
jee main 2020
electromagnetic waves
jee
magnetic field
jee mains
class-12
+2
votes
1
answer
(i) How are microwaves produced ? Why is it necessary in microwave ovens to select the frequency of microwaves
asked
Apr 4, 2019
in
Class 12
by
kratos
electromagnetic waves
class-12
cbse
electromagnetic spectrum
+3
votes
1
answer
Why do the distant hills appear blue? Explain.
asked
Apr 4, 2019
in
Class 10
by
kratos
electromagnetic waves
class-10
spectrum
icse
+3
votes
1
answer
In the diagram a narrow beam of white light is incident on a right angled isosceles prism.
asked
Apr 3, 2019
in
Class 10
by
kratos
spectrum
electromagnetic waves
class-10
icse
the human eye and the colourful world
+2
votes
1
answer
For static electric and magnetic fields in an in homogenous source-free medium,
asked
Apr 2, 2019
in
JEE
by
kratos
electromagnetic waves
class-12
jee
jee mains
+2
votes
1
answer
A magnetic needle of magnetic moment 6.7 x 10^-2 Am^2 and moment of inertia 7.5x 10^-6 kg m^2 is performing simple harmonic oscillations
asked
Mar 31, 2019
in
JEE
by
kratos
irodov
cbse
jee main 2020
electromagnetic waves
oscillations and wave
jee
matter
magnetic effects of electric current
class-10
jee mains
magnetism
class-12
+2
votes
1
answer
Write an expression for the displacement current.
asked
Mar 31, 2019
in
Class 12
by
kratos
class-12
electromagnetic waves
+2
votes
1
answer
What is meant by 'Dispersion of light' ?
asked
Mar 31, 2019
in
Class 10
by
kratos
light
cbse
class-8
electromagnetic waves
spectrum
class-10
icse
the human eye and the colourful world
+2
votes
1
answer
Give three reasons why modulation of a message signal is necessary for long distance transmission.
asked
Mar 30, 2019
in
Physics
by
kratos
cbse
communication
electromagnetic waves
communication systems
class-12
contemporary physics
+1
vote
1
answer
Write any four characteristics of electromagnetic waves.
asked
Mar 30, 2019
in
Physics
by
kratos
communication
electromagnetic waves
electro magnetic waves
informatics practices
class-12
contemporary physics
+1
vote
1
answer
Out of the following options which one can be used to produce a propagating electromagnetic wave?
asked
Mar 30, 2019
in
Physics
by
kratos
communication
electromagnetic waves
class-12
contemporary physics
+3
votes
1
answer
Three waves of same intensity (I0) having initial phases 0,π/4,-π/4 respectively interfere at a point.
asked
Mar 30, 2019
in
JEE
by
kratos
jee main 2020
electromagnetic waves
class-11
jee
optics
jee mains
light waves
+3
votes
1
answer
Rock salt prism is used instead of glass prism to obtain the infra red spectrum. Give reason.
asked
Mar 30, 2019
in
Class 10
by
kratos
spectrum
class-10
icse
electromagnetic waves
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