1
AIPMT 2002
MCQ (Single Correct Answer)
+4
-1
What is the cause of Green house effect ?
A
infra-red rays
B
ultra violet rays
C
X-rays
D
radio waves.
2
AIPMT 2002
MCQ (Single Correct Answer)
+4
-1
The velocity of electromagnetic wave is parallel to
A
$$\overrightarrow B \times \overrightarrow E $$
B
$$\overrightarrow E \times \overrightarrow B $$
C
$$\overrightarrow E $$
D
$$\overrightarrow B $$
3
AIPMT 2001
MCQ (Single Correct Answer)
+4
-1
Biological inportance of ozone layer is
A
it stops ultraviolet rays
B
ozone layer reduces green house effect
C
ozone layer reflects radio waves
D
ozone layer controls O2/H2 ratio in atmosphertte.
4
AIPMT 2000
MCQ (Single Correct Answer)
+4
-1
The frequency order for $$\gamma $$-rays (a), X-rays (b), UV rays (c) is
A
b $$>$$ a $$>$$ c
B
a $$>$$ b $$>$$ c
C
c $$>$$ b $$>$$ a
D
a $$>$$ c $$>$$ b
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