1
AIPMT 2000
MCQ (Single Correct Answer)
+4
-1
For a plano convex lens ($$\mu $$ = 1.5) has radius of curvature 10 cm. It is silvered on its plane surface. Find focal length after silvering
A
10 cm
B
20 cm
C
15 cm
D
25 cm
2
AIPMT 2000
MCQ (Single Correct Answer)
+4
-1
A charge Q is situated at the corner of a cube, the electric flux passed through all the six faces of the cube is
A
$${Q \over {6{\varepsilon _0}}}$$
B
$${Q \over {8{\varepsilon _0}}}$$
C
$${Q \over {{\varepsilon _0}}}$$
D
$${Q \over {2{\varepsilon _0}}}$$
3
AIPMT 2000
MCQ (Single Correct Answer)
+4
-1
By photoelectric effect, Einstein proved
A
E = h$$\upsilon $$
B
K.E. = $${1 \over 2}$$ mv2
C
E = mc2
D
E = $${{ - Rh{c^2}} \over {{n^2}}}$$
4
AIPMT 2000
MCQ (Single Correct Answer)
+4
-1
Who evaluated the mass of electron infirectly with help of charge
A
Thomson
B
Millikan
C
Rutherford
D
Newton
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