1. An electric dipole is formed by two charges +q and -q located in xy-plane at (0, 2) mm and (0, -2) mm, respectively, as shown in the figure. The electric potential at point P(100, 100) mm due to the dipole is V. The charges +q and -q are then moved to the points (-1, 2) mm and (1, -2) mm, respectively. What is the value of electric potential at P due to the new dipole? (A) (C) 5752 +9 (-1, 2) mm 9 (0, 2) mm P(100, 100) mm -q(1,-2) mm (0, -2) mm Vo (B) 2 3% (D) 4 2. Young's modulus of elasticity Y is expressed in terms of three derived quantities, namely, the gravitational constant G, Planck's constant h and the speed of light c, as Y = ch G. Which of the following is the correct option? (A) a =7, B=-1,y=-2 (C) a 7, B=-1, y = 2 (B) a=-7, =-1,y=-2 (D) a =-7, B=1,y=-2 3. A particle of mass m is moving in the xy-plane such that its velocity at a point (x, y) is given as v = a(yx+2x), where a is a non-zero constant. What is the force F acting (A) F 2ma2 (xx + y) (C) F=2ma (yx+x) the particle? (B) F=ma (yx+2x) (D) F=ma (xx+2y) 4. An ideal gas is in thermodynamic equilibrium. The number of degrees of freedom of a molecule of the gas is n. The internal energy of one mole of the gas is U and the speed of sound in the gas is V. At a fixed temperature and pressure, which of the following is the correct option? (A) V3 U6 (C) V5 V, and U V3 and U3 >U5 (D) vv, and U