1
AIPMT 2001
MCQ (Single Correct Answer)
+4
-1
A photo-cell is illuminated by a source of light, which is placed at a distance d from the cell. If the distance become d/2, then number of electrons emitted per second, will be
A
remain same
B
four times
C
two times
D
one-fourth
2
AIPMT 2001
MCQ (Single Correct Answer)
+4
-1
X(n, $$\alpha $$) $${}_3^7$$Li, then X will be
A
$${}_5^{10}$$ B
B
$${}_5^9$$ B
C
$${}_5^{11}$$ Be
D
$${}_2^4$$ He.
3
AIPMT 2001
MCQ (Single Correct Answer)
+4
-1
The interplanar distance in a crystal is 2.8 $$ \times $$ 10$$-$$8 m. The value of maximum wavelength which can be diffracted
A
2.8 $$ \times $$ 10$$-$$8 m
B
5.6 $$ \times $$ 10$$-$$8 m
C
1.4 $$ \times $$ 10$$-$$8 m
D
7.6 $$ \times $$ 10$$-$$8 m
4
AIPMT 2001
MCQ (Single Correct Answer)
+4
-1
The energy of hydrogen atom in nth orbit is En then the energy in nth orbit of singly ionised helium atom will be
A
4En
B
En/4
C
2En
D
En/2
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