1
JEE Main 2014 (Offline)
+4
-1
Match List - $$1$$ (Electromagnetic wave type ) with List - $$2$$ (Its association/application) and select the correct option from the choices given below the lists:
A
$$1 - iv,\,\,2 - iii,\,\,3 - ii,\,\,4 - i$$
B
$$1 - i,\,\,2 - ii,\,\,3 - iv,\,\,4 - iii$$
C
$$1 - iii,\,\,2 - ii,\,\,3 - i,\,\,4 - iv$$
D
$$1 - i,\,\,2 - ii,\,\,3 - iii,\,\,4 - iv$$
2
JEE Main 2013 (Offline)
+4
-1
The magnetic field in a travelling electromagnetic wave has a peak value of $$20$$ $$n$$$$T$$. The peak value of electric field strength is :
A
$$3V/m$$
B
$$6V/m$$
C
$$9V/m$$
D
$$12V/m$$
3
AIEEE 2012
+4
-1
An electromagnetic wave in vacuum has the electric and magnetic field $$\mathop E\limits^ \to$$and $$\mathop B\limits^ \to$$, which are always perpendicular to each other. The direction of polarization is given by $$\mathop X\limits^ \to$$ and that of wave propagation by $$\mathop k\limits^ \to$$. Then
A
$$\mathop X\limits^ \to ||\mathop B\limits^ \to$$ and $$\mathop X\limits^ \to ||\mathop B\limits^ \to \times \mathop E\limits^ \to$$
B
$$\mathop X\limits^ \to ||\mathop E\limits^ \to$$ and $$\mathop k\limits^ \to ||\mathop E\limits^ \to \times \mathop B\limits^ \to$$
C
$$\mathop X\limits^ \to ||\mathop B\limits^ \to$$ and $$\mathop k\limits^ \to ||\mathop E\limits^ \to \times \mathop B\limits^ \to$$
D
$$\mathop X\limits^ \to ||\mathop E\limits^ \to$$ and $$\mathop k\limits^ \to ||\mathop B\limits^ \to \times \mathop E\limits^ \to$$
4
AIEEE 2006
+4
-1
The $$rms$$ value of the electric field of the light coming from the Sun is $$720$$ $$N/C.$$ The average total energy density of the electromagnetic wave is
A
$$4.58 \times {10^{ - 6}}\,J/{m^3}$$
B
$$6.37 \times {10^{ - 9}}\,J/{m^3}$$
C
$$81.35 \times {10^{ - 12}}\,J/{m^3}$$
D
$$3.3 \times {10^{ - 3}}\,J/{m^3}$$
EXAM MAP
Medical
NEET