1
AIEEE 2002
MCQ (Single Correct Answer)
+4
-1
Change Language
Which of the following are not electromagnetic waves?
A
cosmic rays
B
gamma rays
C
$$\beta $$-rays
D
$$X$$-rays
2
AIEEE 2002
MCQ (Single Correct Answer)
+4
-1
Change Language
By increasing the temperature, the specific resistance of a conductor and a semiconductor
A
increases for both
B
decreases for both
C
increases, decreases
D
decreases, increases
3
AIEEE 2002
MCQ (Single Correct Answer)
+4
-1
Change Language
If $$13.6$$ $$eV$$ energy is required to ionize the hydrogen atom, then the energy required to remove an electron from $$n=2$$ is
A
$$10.2$$ $$eV$$
B
$$0$$ $$eV$$
C
$$3.4$$ $$eV$$
D
$$6.8$$ $$eV.$$
4
AIEEE 2002
MCQ (Single Correct Answer)
+4
-1
Change Language
An astronomical telescope has a large aperture to
A
reduce spherical aberration
B
have high resolution
C
increase span of observation
D
have low dispersion

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