Q. A circular loop of wire 7.6 cm in diameter (seen edge-on) is placed with its normal at an angle θ = 37° with the direction of a uniform magnetic field of magnitude B = 0.59 T. The loop is then rotated such that the normal rotates in a cone about the field direction at the rate 99 rev/min; angle θ remains unchanged during the process. What is the emf induced in the loop?
Q. A convex Lens of focal length 18.0 cm is used as a magnifying glass. At what distance from a tiny insect should you hold this lens to get a magnification of +3.00?