Saturday, May 16, 2009

IIT JEE Level Revision Questions - 1. Introduction to physics

Past JEE Question

Which of the following choices does not represent the same dimensions of the mentioned physical quanties?

a. Heat, potential energy and work
b. Electric flux, electric field, and electric dipole moment
c. Pressure, stress, and Young's modulus
d. Potential difference, voltage, and electromotive force of a galvanic cell.

(JEE 2005 screening)
Answer: b

Revision question 1

Find dimensions of a) work done by a force b) linear momentum, c)kinetic energy

Past JEE question

In the expression P = (α²/β)e-αZ/kθ, P is pressure, Z is distance, k is Boltzmann constant and θ is the temperature. The dimensional formula of β will be

a. M¹L³T-2
b. M¹L²T-2
c. M¹L¹T-1
d. M°L²T-1

Value of k = Boltzmann constant = 1.38*10-23 J/K

(JEE 2004 screening)

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