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  #1  
Old April 2nd, 2014, 12:04 PM
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Default WBJEE Exam Previous Year Solved Question Papers

Can you give me question paper for west Bengal joint entrance examination ??
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Old April 2nd, 2014, 05:47 PM
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Default Re: WBJEE Exam Previous Year Solved Question Papers

here I am giving you question paper for west Bengal joint entrance examination in PDF files attached with it so you can get it easily..

some questions are given below :
8. A bar magnet has a magnetic moment of 200 A.m2. The magnet is suspended in a magnetic field of 0.30 NA–1 m–1. The
torque required to rotate the magnet from its equilibrium position through an angle of 30°, will be
(A) 30N m (B) 30 3 N m (C) 60 N m (D) 60 3 N m
Ans : (A)

11. The velocity of a car travelling on a straight road is 36 kmh–1 at an instant of time. Now travelling with uniform
acceleration for 10 s, the velocity becomes exactly double. If the wheel radius of the car is 25 cm, then which of the
following numbers is the closest to the number of revolutions that the wheel makes during this 10 s?
(A) 84 (B) 95 (C) 126 (D) 135
Ans : (B)

12. Two glass prisms P1
and P2 are to be combined together to produce dispersion without deviation. The angles of the
prisms P1 and P2 are selected as 4° and 3° respectively. If the refractive index of prism P1 is 1.54, then that of P2 will
be
(A) 1.48 (B) 1.58 (C) 1.62 (D) 1.72
Ans : (D)
Hints : δ1 + δ2 = 0 ⇒ (μ – 1)A1 = (μ2 – 1)A2 ⇒ μ2 = 1.72

13. The ionization energy of the hydrogen atom is 13.6 eV. The potential energy of the electron in n = 2 state of hydrogen
atom is
(A) + 3.4 eV (B) – 3.4 eV (C) + 6.8 eV (D) – 6.8 eV
Ans : (D)

16. A wire of initial length L and radius r is stretched by a length l. Another wire of same material but with initial length 2L
and radius 2r is stretched by a length 2l. The ratio of the stored elastic energy per unit volume in the first and second
wire is,
(A) 1 : 4 (B) 1 : 2 (C) 2 : 1 (D) 1 : 1
Ans : (D)










Attached Files
File Type: pdf WBJEE-mathematics-Question-Paper.pdf (610.7 KB, 62 views)
File Type: pdf WBJEE-mathematics-Question-Paper 1.pdf (635.2 KB, 30 views)
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