Telegram group: T.me/BBCNOUN [PHY492] To determine the forward and reverse bias characteristic of a junction diode we use__________ 2kΩ rheostat [PHY492] In an experiment to o determine the characteristics of an operational amplifier by measuring the voltage gains and bandwidths we use Rheostat [PHY492] In an experiment to determine the focal length of a concave lens using a convex lens we use Concave lens [PHY492] The bending of a ray of light when it travelsnthrough a medium is called_______________ refraction [PHY492] A light ray is at 50 degrees to aplane mirror. What is the angle between the incident and the reflected rays? 100 degrees [PHY492] To demonstrate the action of a junction diode as (1) a half-wave rectifier (2) a full-wave rectifier we use dc milliammeter [PHY492] What is the peak value of current with r.m.s value of 10A? 7.07A [PHY492] In Nigeria electric power distribution system uses a frequency of________ 50hertz [PHY492] Which of the folowing can be used for magnification? convex lens [PHY492] Calculate the angle of refraction for the incident angle is 30 degrees, if the refractive index of air to glass is 1.5 19.5 degrees