1.)Which of the following statements is CORRECT?
A.) An electric motor converts mechanical energy into electrical energy.
B.) An electric motor uses machine to convert mechanical energy into electricity before it can perform it's work.
C.) A generator uses motion in a magnetic field to produce current.
D.)A generator converts electrical energy into mechanical energy.

2.) Many machines we use are powered by ___________.
A.) sound energy
B.) thermal energy
C.) dynamo
D.) electric motors

3.) Which lens in binoculars are used to control and focus distant objects?
A.) a concave and a convex lens
B.) two convex lenses
C.) two plane lens
D.) two concave lenses

4.) Permanent magnets and electromagnets are widely used in electronic devices such as generators, speakers, televisions, MRI scanners, motors etc.
A.) False
B.) True

5.) Where should the object be placed in front of a magnifying lens in order to see an enlarged image of the object?
A.) Between 2F and F
B.) At the focal point
C.) Between the focal point and the lens
D.) Beyond 2F

6.) Which corresponds to the function of commutator?
A.) reverses the flow of current
B.) connect the brushes to the current source
C.) turns the driveshaft
D.) rotates away from the poles of the magnet