I am looking for the West Bengal Joint Entrance Examinations Physics and Chemistry entrance exam question paper ?

Here I am providing the list of few questions of West Bengal Joint Entrance Examinations Physics and Chemistry entrance exam question paper which you are looking for .

1. Experimental investigations show that the intensity of solar radiation is maximum for a wavelength 480 nm in the visible region.
Estimate the surface temperature of sun. Given Wein’s constant b = 2.88 × 10–3 mK.
(A) 4000 K (B) 6000 K (C) 8000 K (D) 106 K

2. The temperature of an ideal gas is increased from 120 K to 480 K. If at 120 K, the root mean square speed of gas molecules is v, then at 480 K it will be
(A) 4v (B) 2v (C)2v
(D)4v
Ans : (B)

3. Two mirrors at an angle θº produce 5 images of a point. The number of images produced when θ is decreased to θº – 30º is
(A) 9 (B) 10 (C) 11 (D) 12
Ans : (C)
Hints : No. of images = 5
∴ θ = 60º
New angle = θ – 30º = 30º. No of images = 11 1
º 30
º 360 = −

4. The radius of the light circle observed by a fish at a depth of 12 meter is (refractive index of water = 4/3)
(A) 7 36 (B) 7
36
(C) 5 36 (D) 5 4
Ans : (B)
West Bengal Joint Entrance Examinations Physics and Chemistry entrance exam question paper





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WBJEE Question Bank.pdf (773.3 KB, 68 views)