Diameter of the objective lens of a telescope is 250 cm. For light of wavelength 600nm. coming from a distant object, the limit of resolution of the telescope is close to :-

The area of a square is 5.29 cm². The area of 7 such squares taking into account the significant figures is :-

The logic gate equivalent to the given logic circuit is :-

A very long solenoid of radius R is carrying current I(t) = kte^–at(k > 0), as a function of time (t $$ \ge $$ 0). counter clockwise current is taken to be positive. A circular conducting coil of radius 2R is placed in the equatorial plane of the solenoid and concentric with the solenoid. The current induced in the outer coil is correctly depicted, as a function of time, by :-