1
AIPMT 2010 Prelims
MCQ (Single Correct Answer)
+4
-1
A ray of light travelling in a transparent medium of refractive index $$\mu $$, falls on a surface separating the medium from air at an angle of incidence of 45o. For which of the following value of $$\mu $$ the ray can undergo total internal reflection ?
A
$$\mu $$ = 1.33
B
$$\mu $$ = 1.40
C
$$\mu $$ = 1.50
D
$$\mu $$ = 1.25
2
AIPMT 2010 Prelims
MCQ (Single Correct Answer)
+4
-1
A beam of cathode rays is subjected to crossed electric (E) and magnetic fields (B). The fields are adjusted such that the beam is not deflected. The specific charge of the cathode rays is given by

(Where V is the potential difference between cathode and anode)
A
$${{{B^2}} \over {2V{E^2}}}$$
B
$${{2V{B^2}} \over {{E^2}}}$$
C
$${{2V{E^2}} \over {{B^2}}}$$
D
$${{{E^2}} \over {2V{B^2}}}$$
3
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
4
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
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