1. The wire of an electric bulb is known as the   Filament   Luminous Wire   Radiator   Heating Element   Hint Half-n-half Clue   2. The high pitched cries of a bat are above human hearing.   True   False   3. The presence of charge on a substance can be confirmed by a   Thermometer   Electrodes   Ammeter   Gold Leaf Electroscope   Half-n-half Clue   4. What does this statement define The rate of change of position in a fixed direction.   Acceleration   Speed   Velocity   Momentum   Half-n-half Clue   5. Which of the following is attracted by a magnet?   Iron   Glass   Sodium   Leather   Half-n-half Clue   6. When a spring is released, its potential energy is converted to   Kinetic Energy   Magnetic Energy   Light Energy   Electrical Energy   Half-n-half Clue   7. What is the name of the point where light rays from infinity coverge after passing through a lens?   Center   Focus   Infinity   Parabola   Half-n-half Clue