WBJEE Solved Paper

Will you please provide me the sample question paper of West Bengal Joint Entrance Examination WBJEE?

Ok, here I am providing you the sample question paper of West Bengal Joint Entrance Examination WBJEE

WBJEE Exam question paper

Sub : Physics

Category - I

Q. 1 – Q. 45 carry one mark each, for which only one option is correct.

Any wrong answer will be lead to deduction of 1/3 mark.

A frictionless piston-cylinder based enclosure contains some amount of gas at a pressure of 400 kPa. Then heat is
transferred to the gas at constant pressure in a quasi-sta ic process. The piston moves up slowly through a height of
10cm. If the piston has a cross-section area of 0.3 m2, the work done by the gas in this process is
(A) 6 kJ (B) 12 kJ (C) 7.5 kJ (D) 24 kJ
Ans : (B)

An ideal mono-atomic gas of given mass is heated at constant pressure. In this process, the fraction of supplied heat
energy used for the increase of the internal energy of the gas is
(A) 3/8 (B) 3/5 (C) 3/4 (D) 2/5
Ans : (B)

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)

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)

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)

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)




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