W.B Joint Entrance Exam

The Question Pattern

There will be Multiple Choice Questions (MCQ-type, with four options including single correct answer) carrying 80% weightage of the total marks and remaining 20% will be of short answer type.

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

1.The number of ways four boys can be seated around a round-table in four chairs of different colours is
(A)  24  (B) 12  (C)  23  (D) 64