1
AIPMT 2005
MCQ (Single Correct Answer)
+4
-1
A photosensitive metallic surface has work function, h$$\upsilon $$0. If photons of energy $$2h{\upsilon _0}$$ fall on this surface, the electrons come out with a maximum velocity of 4 $$ \times $$ 106 m/s. When the photon energy is increased to 5 h$$\upsilon $$0, then maximum velocity of photoelectrons will be
A
2 $$ \times $$ 107 m/s
B
2 $$ \times $$ 106 m/s
C
8 $$ \times $$ 106 m/s
D
8 $$ \times $$ 105 m/s
2
AIPMT 2005
MCQ (Single Correct Answer)
+4
-1
In the reaction $${}_1^2$$H + $${}_1^3$$H $$ \to $$ $${}_2^4$$He + $${}_0^1$$n, if the binding
energies of $${}_1^2$$ H, $${}_1^3$$H and $${}_2^4$$He are respectively a, b and c (in MeV),
then the energy (in MeV) released in this reaction is
A
a + b + c
B
a + b $$-$$ c
C
c $$-$$ a $$-$$ b
D
c + a $$-$$ b
3
AIPMT 2005
MCQ (Single Correct Answer)
+4
-1
The total energy of an electron in the first excited state of hydrogen atom is about $$-$$ 3.4 eV. Its kinetic energy in this state is
A
3.4 eV
B
6.8 eV
C
$$-$$ 3.4 eV
D
$$-$$ 6.8 eV
4
AIPMT 2005
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Which one of the following pairs of nuclei are isotones ?
A
34Se74,  31Ga71
B
38Sr84,  38Sr86
C
42Mo92,   40Zr92
D
20Ca40,  16S32
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
CBSE
Class 12