WBJEE Chapterwise Questions

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[pawan]

I will get the West Bengal Joint Entrance Exam paper so that you can get idea from the paper and I hope you will score well in exam.

An object is located 4 m from the first of two thin converging lenses of focal lengths 2 m and 1 m respectively. The lenses are separated by 3 m. The final image formed by the second lens is located from the source at a distance of
(A) 8.0 m
(B) 7.5 m
(C) 6.0 m
(D) 6.5 m


A straight conductor 0.1m long moves in a uniform magnetic field 0.1T. The velocity of the conductor is 15 m/s and is directed perpendicular to the field. The e.m.f. induced between the two ends of the conductor is
(A) 0.10 V
(B) 0.15 V
(C) 1.50 V
(D) 15.00 V

When light is refracted from a surface, which of its following physical parameters does not change ?
(A) velocity
(B) amplitude
(C) frequency
(D) wavelength

A thin plastic sheet of refractive index 1.6 is used to cover one of the slits of a double slit arrangement. The central point on the screen is now occupied by what would have been the 7th bright fringe before the plastic was used. If the wavelength of light is 600 nm, what is the thickness (in m) of the plastic?
(A) 7
(B) 4
(C) 8
(D) 6

Three bodies of the same material and having masses m, m and 3m are at temperature 40°C, 50°C and 60°C respectively. If the bodies are brought in thermal contact, the final temperature will be
(A) 45°C
(B) 54°C
(C) 52°C
(D) 48°C


WBJEE exam paper








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