Pre-Test: Science 10 - Fourth Quarter

Which of the following lenses is a diverging lens?

• Convex lens

• Concave lens

• Cylindrical shape lens

• Magnifying glass

The diagram shows an object placed in front of a concave lens. What are the characteristics of the image formed?

• Real, inverted, magnified

• Real, inverted, diminished

• Virtual upright, magnified

• Virtual, upright, diminished

A microscope containing an eyepiece with a magnifying power of 4 times and an objective lens with a magnifying power of 40 times. Calculate the magnifying power of the microscope.

• 10 times

• 36 times

• 44 times

• 160 times

An object is placed at a concave mirror's center of curvature. The image produced by the mirror is located

• out beyond the center of curvature.
• at the center of curvature.
• between the center of curvature and the focal point.
• at the focal point.

If you wish to get enlarged image of any object, which mirror will u select?

• Convex mirror

• Plane mirror

• None of these

• Concave mirror

How to you decide that a mirror is concave or convex without touching it?

• By observing the surface

• By keeping them in sunlight so that surfaces can be clearly seen

• By keeping them in front of your face and observing the kind of image we obtain

• By moving mirrors here and there

Why are electrical cords covered in plastic or rubber?

• because plastic and rubber are insulators which keeps us safe

• because it looks nicer

• because plastic and wire help conduct electricity

• because wires are color coded based on voltage

A series circuit will continue to work if one of the light bulbs is unscrewed.

• true

• false

These magnets will...

• attract

• repel

• nothing will happen

This is an example of what type of circuit?

• simple

• series

• parallel