8. A charge particle is moving in uniform magnetic field (2+3) T. If it has an acceleration of (ai-4)m/s, then the value of a will be: (a)6 (b) 7 (c) 8 (d)9 9. Bx and By are the magnetic fields at the centre of two coils X and Y respectively each carrying equal current. If coil X has 200 turns and 20 cm radius and coil Y has 400 turns and 20 cm radius, the ratio of Bx and By is: (a) 1:1 (b) 1:2 10. The current I in the above given circuit will be: (c) 2:1 (d) 4:1 (a) 10 A 402 www. 202 www 492 492 492 40V (b) 20 A (c) 4 A (d) 40 A 11. The total charge on the system of capacitors C = 1F, C = 2F, C =4F and C = 3F connected in parallel is: (Assume a battery of 20V is connected to the combination) (a) 200C (b) 200C (c) 10C (d)10 C 12. When a particle executes Simple Hormonic Motion, the nature of graph of velocity as a function of displacement will be: (a) Circular (b) Elliptical (c) Sinusoidal (d) Straight line