1
AIPMT 2010 Prelims
MCQ (Single Correct Answer)
+4
-1
The potential difference that must be applied to stop the fastest photoelectrons emitted by a nickel surface, having work functions 5.01 eV, when ultraviolet light of 200 nm falls on it, must be
A
2.4 V
B
$$-$$ 1.2 V
C
$$-$$ 2.4 V
D
1.2 V
2
AIPMT 2010 Prelims
MCQ (Single Correct Answer)
+4
-1
A source S1 is producing, 1015 photons per second of wavelength 5000 $$\mathop A\limits^ \circ $$. Another source S2 is producing 1.02 $$ \times $$ 1015 photons per second of wavelength 5100 $$\mathop A\limits^ \circ $$. Then, (power of S2)/(power of S1) is equal to
A
1.00
B
1.02
C
1.04
D
0.98
3
AIPMT 2010 Prelims
MCQ (Single Correct Answer)
+4
-1
An alpha nucleus of energy $${1 \over 2}$$ mv2 bombards a heavy nuclear target of charge Ze. Then the distance of closest approach for the alpha nucleus will be proportional to
A
$${1 \over {Ze}}$$
B
v2
C
$${1 \over m}$$
D
$${1 \over {{v_4}}}$$
4
AIPMT 2010 Prelims
MCQ (Single Correct Answer)
+4
-1
The mass of a $${}_3^7Li$$ Li nucleus is 0.042 u less than the sum of the masses of all its nucleons. The binding energy per nucleon of $${}_3^7Li$$ nucleus is nearly
A
46 MeV
B
5.6 MeV
C
3.9 MeV
D
23 MeV