Physics Quiz: Image Formation and Electrostatics for 10th Grade

What determines the magnification of an image through a lens?

• Object size only
• Distance of object and image from the lens
• Lens thickness
• Light intensity

If the magnification (M) is 2, what does this indicate about the image?

• Image is half the object size
• Image is twice the object size
• Image and object are same size
• Image is inverted

Which statement best describes a convex lens experiment's precaution?

• Use bright sunlight
• Experiment can be done in any lighting
• Conduct in a dark room or cover apparatus
• Ignore image clarity

When a body becomes positively charged, what has happened?

• Gained electrons
• Lost electrons
• Remained neutral
• Split atoms

What makes metals excellent electrical conductors?

• Tightly bound electrons
• No free electrons
• Loosely bound electrons
• Absence of electrons

What happens when two negatively charged balloons are brought close together?

• They attract
• They remain neutral
• They repel
• They merge

Why must insulators be kept dry?

• To prevent rusting
• To maintain insulating properties
• To increase conductivity
• To reduce weight

When a Perspex rod is rubbed with a dry cloth, what happens to the rod?

• Becomes negatively charged
• Becomes positively charged
• Remains neutral
• Loses mass

What property makes rubber a good electrical insulator?

• Tightly bound electrons
• Free electron movement
• High conductivity
• Metal content

In an image formation experiment, what indicates a clear image?

• Bright illumination
• Maximum light
• Sharpest focus
• Largest projection