# WBJEE 2014 Solved Physics Question Paper – Part 1

May 3, 2017 18:17 IST

Find WBJEE 2014 Solved Physics Question Paper – Part 1 in this article. This paper consists of 5 questions (#1 to #5) from WBJEE 2014 Physics paper. Detailed solution of these questions has been provided so that students can match their solutions.

Importance of Previous Years’ Paper:

Previous years’ question papers help aspirants in understanding exam pattern, question format, important topics and assessing preparation. It has also been seen that sometimes questions are repeated in WBJEE Exam. So, this paper will certainly boost your confidence.

WBJEE is a common entrance examinations held at state level for admission to the undergraduate level engineering and medical courses in the state of West Bengal. The Mathematics section of WBJEE 2014 engineering entrance exam consists of 80 questions.

Q1. A whistle whose air column is open at both ends has a fundamental frequency of 5100 Hz. If the speed of sound in air is 340 ms–1, the length of the whistle, in cm, is

(A) 5/3

(B) 10/3

(C) 5

(D) 20/3

Ans: (B)

Sol:

According to the wave equation,

Speed = Frequency . Wavelength

The relationship, which works only for the first harmonic of an open-end air column, is

wavelength = 2L

Q2. One mole of an ideal monoatomic gas is heated at a constant pressure from 0°C to 100°C. Then the change in the internal energy of the gas is (Given R = 8.32 Jmol–1K–1)

(A) 0.83 × 103 J

(B) 4.6 × 103 J

(C) 2.08 × 103 J

(D) 1.25 × 103 J

Ans: (D)

Sol:

Q4. In which of the following pairs, the two physical quantities have different dimensions?

(A) Planck’s constant and angular momentum

(B) Impulse and linear momentum

(C) Moment of inertia and moment of a force

(D) Energy and torque

Ans: (C)

Sol.

Moment of inertia and moment of a force are the two physical quantities which have different dimensions.

Q5. A small metal sphere of radius a is falling with a velocity ν through a vertical column of a viscous liquid. If the coefficient of viscosity of the liquid is η, then the sphere encounters an opposing force of

Ans: (C)

Sol:

According to Stoke’s law the frictional drag due to viscous force is given as,

Frictional force (F) = 6πηav

Also Get:

WBJEE Online Test

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