8. The incident ray, reflected ray and the outward drawn normal are denoted by the unit vectors a,b and c respectively. Then choose the correct relation for these vectors. (a) b=a-c 9. (b) b=a+2c (c) b=2a+c (d) b=a-2(.c) -000000 B Two masses A and B, each of mass M are fixed together by a massless spring. A force acts on the mass B as shown in figure. If F A the mass A starts moving away from mass B with acceleration 'a', then the acceleration of mass B will be: Ma-F (a) (b) M MF F+Ma (c) F+Ma M F-Ma (d) M 10. (b) a circle A particle executes S.H.M., the graph of velocity as a function of displacement is: (a) an ellipse (c) a helix (d) a parabola 11. A scooter accelerates from rest for time t at constant rate a and then retards at constant rate a 12. for time t and comes to rest. The correct value of t will be: t (a) +a. a a (b) a (c) a+a a (d) a a2 If 'C' and 'V' represent capacity and voltage respectively then what are the dimensions of where C/V = ? (a) [ML] (b) [ML-3] (c) [M LPT7] (d) [MLAPT7] 13. The internal energy (U), pressure (P) and volume (V) of an ideal gas are related as U = 3PV + 4. The gas is: (a) polyatomic only (c) either mono-atomic or diatomic (b) diatomic only (d) mono-atomic only 14. An aeroplane, with its wings spread 10m, is flying at a speed of 180 km/h in a horizontal direction. The total intensity of earth's field at that part is 2.5 x 10 Wb/m and the angle of dip is 60. The emf induced between the tips of the plane wings will be.............. (a) 88.37mV (b) 54.125mV (c) 62.50mV (d) 108.25mV