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1
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
The electric and the magnetic field, associated with an e.m. wave, propagating along the +z-axis, can be represented by
A
$$\left[ {\overrightarrow E = {E_0}\widehat i,\overrightarrow B = {B_0}\widehat j} \right]$$
B
$$\left[ {\overrightarrow E = {E_0}\widehat k,\overrightarrow B = {B_0}\widehat i} \right]$$
C
$$\left[ {\overrightarrow E = {E_0}\widehat j,\overrightarrow B = {B_0}\widehat i} \right]$$
D
$$\left[ {\overrightarrow E = {E_0}\widehat j,\overrightarrow B = {B_0}\widehat k} \right]$$
2
AIPMT 2011 Prelims
MCQ (Single Correct Answer)
+4
-1
The decreasing order of wavelength of infrared, microwave, ultraviolet and gamma rays is
A
microwave, infrared, ultraviolet, gamma rays
B
gamma rays, ultraviolet, infraref, microwaves
C
microwaves, gamma rays, infrared, ultraviolet
D
infrared, microwave, ultraviolet, gamma rays
3
AIPMT 2010 Mains
MCQ (Single Correct Answer)
+4
-1
The electric field of an electromagnetic wave in free space is given by $$\overrightarrow E = 10\cos ({10^7}t + kx)\widehat j\,\,V/m,$$ where t and x are in seconds and metres respectively. It can be inferred that
(1)  the wavelength $$\lambda $$ is 188.4 m.
(2)  the wave number k is 0.33 rad/m.
(3)  the wave amplitude is 10 V/m.
(4)  the wave is propagating along +x direction.

Which one of the following pairs of statements is correct ?
A
(3)  and  (4)
B
(1)  and  (2)
C
(2)  and  (3)
D
(1)  and  (3)
4
AIPMT 2010 Prelims
MCQ (Single Correct Answer)
+4
-1
Which of the following statement is false for the properties of electromagnetic waves ?
A
Both electric and magnetic field vectors attain the maxima and minima at the same place and same time.
B
The energy in electromagnetic wave is divided equally between electric and magnetic vectors.
C
Both electric and magnetic field vectors are parallel to each other and perpendicular to the direction of propagation of wave.
D
These waves do not require any material medium for propagation.
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