Science 10 Quarterly Exam

It is defined as the bending of light as it passes from one material to another due to the difference in their optical densities.

• Diffraction

• Interference

• Reflection

• Refraction

A type of lens which is thicker in the middle than at the edges?

• convex

• concave

• plane

• none of these

A type of image that is formed by the actual intersection of light rays after passing through the lens.

• real

• virtual

• upright

• inverted

What is the nature of the lens if the image produced is smaller, upright, and virtual when an object is placed in front of it?

• plane

• concave

• convex

• none of these

Where should the object be placed in front of a convex to have an upright, bigger, and virtual image?

• Between C and F

• Between F and O

• At C

• At F

On the LIST BELOW, light has the highest velocity in which medium?

• Barium glass

• diamond

• flint glass

• water

What optical device forms an image of the same size, real and upright?

• camera

• photocopier

• telescope

• torchlight

Which part in DC generators converts AC current into DC current?

• armature

• brushes

• commutator

• stator

Which two forces are required to operate generators and electric motors?

• electric and magnetic

• magnetic and radiant

• electric and thermal

• magnetic and thermal

Identify the characteristic that is NOT true for a concave lens among the following options:

• Real

• smaller

• Upright

• Virtual