CHOOSE THE LETTER OF THE CORRECT ANSWER. PLEASE MAKE SURE ALL THE ANSWERS ARE CORRECT

1. Which is NOT an application of concave mirrors? *

a. dental mirrors

b. vanity mirror

c. side mirror

d. headlights

2. Which is an application of convex lens? *

a. Eyeglass

b. Magnifying glass

c. Microscope

d. All of the above.

3. It is the first telescope used to study heavenly bodies which used both concave and convex lenses. *

a. Newton's Telescope

b. Galileo's Telescope

c. Einstein's Telescope

d. Socrates' Telescope

4. This is used on doors of condominiums which uses at least three concave lenses and a convex lens. *

a. Security mirror

b. Glass

c. Peephole

d. Camera

5. What kind of mirror is used by grocery or convenience stores to give a broader view of the area and smaller picture of the buyers? *

a. plane mirror

b. concave mirror

c. diffused mirror

d. convex mirror

6. Peter observed a nail attracted to a magnet. What do you call the property of being able to attract objects made up of naturally occurring magnetic substances? *

a. magnetism

b. magnetic field

c. magnetic force

d. magnetic induction

7. It is the process in which electric current is generated by a changing magnetic field. *

a. Magnetic induction

b. Electric induction

c. Electromagnetic induction

d. None of the above

8. What transformation of energy will take place in a simple electric generator? *

a. electrical energy to mechanical energy

b. mechanical energy to electrical energy

c. mechanical energy to heat energy

d. heat energy to mechanical energy

9. An electric fan's electric motor is powered by electromagnetic induction. What transformation of energy will take place in an electric fan's electric motor? *

a. electrical energy to mechanical energy

b. mechanical energy to electrical energy

c. mechanical energy to heat energy

d. heat energy to mechanical energy

10. What will be the classification of a generator if its electric charge (current) only flows in one direction? *

a. AC Generator

b. DC Generator

c. AC and DC Generator

d. None of the above

11. Which of the following are the qualitative characteristics of the image formed by a vanity mirror? *

a. Virtual, Upright, Enlarge

b. Virtual, Upright, Same size

c. Real, Inverted, Reduce

d. Real, Inverted, Enlarge

12. Which type of mirror is used as a reflector in headlights of vehicles? *

a. Convex mirror

b. Concave mirror

c. Plane mirror

d. None of the above

13. Which type of mirror is used as a sidemirror for vehicles? *

a. Convex mirror

b. Concave mirror

c. Plane mirror

d. None of the above

14. How many lens does a Peephole or Door Viewer usually use? *

a. two concave lens and a convex lens

b. two convex lens and a concave lens

c. three concave lens and a convex lens

d. three convex lens and a concave lens

15. Which type of lens is used for the correction of hyperopia or farsightedness? *

a. Convex lens

b. Concave lens

c. Plano-convex

d. Plano-concave

16. Which type of lens is used for correction of myopia or near-sightedness? *

a. Convex lens

b. Concave lens

c. Plano-convex

d. Plano-concave

17. Which of the following is used to see far object using your two eyes? *

a. Binoculars

b. Camera

c. Eyeglasses

d. Microscope

18. Which of the following is used to see minute objects and organisms? *

a. Binoculars

b. Camera

c. Eyeglasses

d. Microscope

19. The following devices powered partially or entirely by electromagnetic induction, EXCEPT: *

a. Audio interface

b. Computer system unit

c. Digital audio software

d. Studio monitor

20. The following are powered by electricity, EXCEPT: *

a. Audio-video cables

b. Digital audio software

c. Headphones

d. Extension wire

21. Which part of generator converts mechanical energy produced by the engine into electric current? *

a. Alternator

b. Engine

c. Exhaust system

d. Fuel system

22. Which part of generator dispel the harmful gases emitted by the generator during use? *

a. Alternator

b. Engine

c. Exhaust system

d. Fuel system

23. Which part of an electric motor reverses the electrical current in the coil each time the coil rotates half a turn? *

a. Brushes

b. Commutator

c. Engine

d. Terminals

24. Which part of an electric motor are the locations where the battery attaches to the motor and sends the current to spin the rotor? *

a. Brushes

b. Commutator

c. Engine

d. Terminals

25. Which part of an electric motor is the portion of the machine that converts the fuel source into usable energy and allows it to move or perform its mechanical function? *

a. Brushes

b. Commutator

c. Engine

d. Terminals