7. Consider an LC circuit, with inductance L = 0.1 H and capacitance C = 103 F, kept on a plane. The area of the circuit is 1 m. It is placed in a constant magnetic field of strength Bo which is perpendicular to the plane of the circuit. At time t = 0, the magnetic field strength starts increasing linearly as B = Bo+ t with = 0.04 Ts-1. The maximum magnitude of the current in the circuit is Answer (04.00) mA. 8. A projectile is fired from horizontal ground with speed v and projection angle 0. When the acceleration due to gravity is g, the range of the projectile is d. If at the highest point in its trajectory, the projectile enters a different region where the effective acceleration due to gravity is g' = then the new range is d' = nd. The value of n is g 0.81' 9. A medium having dielectric constant K >1 fills the space between the plates of a parallel plate capacitor. The plates have large area, and the distance between them is d. The capacitor is connected to a battery of voltage V, as shown in Figure (a). Now, both the plates are moved by a distance of from their original positions, as shown in Figure (b). 12 d 2 Figure (a) Figure (b) In the process of going from the configuration depicted in Figure (a) to that in Figure (b), which of the following statement(s) is (are) correct? (A) The electric field inside the dielectric material is reduced by a factor of 2K. (B) The capacitance is decreased by a factor of 1 asu pre actor of K+1 (C) The voltage between the capacitor plates is increased by a factor of (K + 1). (D) The work done in the process DOES NOT depend on the presence of the dielectric material