If E and B represent electric and magnetic field vectors of the electromagnetic wave, the direction of propagation of electromagnetic wave is along
(a) E.
(b) B.
(c) B × E.
(d) E × B.
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A girl is pushing a box towards east direction. In which direction should her friend push the box so that it moves faster in the same direction?
Towards east.
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The ratio of contributions made by the electric field and magnetic field components to the intensity of an EM wave is
The ratio of contributions made by the electric field and magnetic field components to the intensity of an EM wave is 1 : 1
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An electromagnetic wave travelling along z-axis is given as: E= Eo cos(kz - ωt). Choose the correct options from the following;
(a), (b), (c) (a) The associated magnetic field is given as B=1/c k x E=1/ω(k X E). (b) The electromagnetic field can be written in terms of the associated magnetic field as E=c(B x k). (c) k.E =...
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A plane electromagnetic wave propagating along x direction can have the following pairs of E and B
(b), (d) (b) Ey, Bz. (d) Ez, By.
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Even though an electric field E exerts a force qE on a charged particle yet the electric field of an EM wave
Electric field of an EM wave is an oscillating field and so is the electric force caused by it on a charged particle. This electric force averaged over an integral...
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On the scale of 1 unit length = 10 crore, the bar of length 6 units will represent ________ crore and of ——— units will represent 75 crore.
On the scale of 1 unit length = 10 crore, the bar of length 6 units will represent 60 crore and of 7.5 units will represent 75 crore.
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A charge q is moving in a region where both the magnetic field B and electric field E are simultaneously present.
F = q Vector E + q Vector v x Vector B
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What is the conventional direction of the flow of electric current ? How does it differ from the direction of flow of electrons ?
Solution : Conventional direction of flow of electric current is from positive terminal of a battery to the negative terminal, through the outer circuit. The direction of flow of electrons is...
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You are given the magnetic field pattern of a magnet. How will you find out from it where the magnetic field is the strongest ?
Magnetic field is the strongest at the place where the magnetic field lines are closest together.
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Define magnetic field lines. Describe an activity to draw a magnetic field line outside a bar magnet from one pole to another pole.
The magnetic field lines are the lines drawn in a magnetic field along which a north magnetic pole would move. The magnetic field lines are also known as magnetic lines...
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