Question
An electromagnetic wave propagating along north has its electric field vector upwards. Its magnetic field vector point towards.
✓
Answer
- East
Electric field and magnetic field vectors for an electromagnetic wave are cross - field vectors.
So, the direction of an electromagnetic wave is given by the product of electric field vector and magnetic field vector.
According to the question, electric field vector is directed upwards and EM wave is directed towards North. So, according to the right - hand thumb rule, the magnetic field vector points towards the East.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Intensity of X-rays depends upon the number of(a) Electrons(b) Protons(c) Neutrons(d) Positrons
Assertion : The drift velocity of electrons in a metallic wire will decrease, if the temperature of the wire is increased.
Reason : On increasing temperature, conductivity of metallic wire decreases.(a) If both assertion and reason are true and the reason is the correct explanation of the assertion.(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.(c) If assertion is true but reason is false.(d) If the assertion and reason both are false.
Reason : On increasing temperature, conductivity of metallic wire decreases.(a) If both assertion and reason are true and the reason is the correct explanation of the assertion.(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.(c) If assertion is true but reason is false.(d) If the assertion and reason both are false.
Which is the frequency range of gamma rays from the following?
A compass needle which is allowed to move in a horizontal plane is taken to a geomagnetic pole. It:
In the circuit shown, a meter bridge is in its balanced state. The meter bridge wire has a resistance $0.1\ ohm/cm$. The value of unknown resistance $X$ and the current drawn from the battery of negligible resistance is
→Using visible light what is the shortest wavelength which can be measured?
$N$ identical spherical drops charged to the same potential $V$ are combined to form a big drop. The potential of the new drop will be
→In Young's double$-$slit experiment, an interference pattern is obtained on a screen by a light of wavelength $6000 \mathring A$, coming from the coherent sources $S_1$ and $S_2$. At certain point $P$ on the screen third dark fringe is formed. Then the path difference $S_1 P-S_2 P$ in microns is
→The wavelength of $X-$rays is of the order of
→In hydrogen atom the angular momentum of electron in ground energy state is :