9th Grade Electricity and Magnetism Test

What happens when two magnetic poles of the same type are brought close together?

• They attract strongly
• They repel each other
• They create a neutral zone
• They merge into one pole

Which of the following materials is NOT considered magnetic?

• Iron
• Cobalt
• Glass
• Nickel

How does magnetic field strength change as you move away from a magnet?

• Increases uniformly
• Remains constant
• Decreases gradually
• Becomes unpredictable

What unit is used to measure electric charge?

• Watts
• Amperes
• Coulombs
• Volts

What occurs when opposite electric charges interact?

• They repel
• They remain neutral
• They attract
• They cancel out

Which safety device helps protect electrical circuits from overloading?

• Earth wire
• Fuse
• Trip switch
• Insulation

What is electromagnetic induction primarily used to create?

• Magnetic fields
• Electrical current
• Heat energy
• Sound waves

Which method can generate electrical current through electromagnetic induction?

• Moving a wire across a magnetic field
• Heating a conductor
• Applying static electricity
• Increasing resistance

What potential electrical hazard involves deteriorating protective covering?

• Overheating cables
• Damp conditions
• Damaged insulation
• Overloaded circuits

Which practical device relies on electromagnetic effects?

• Solar panel
• A.C. generator
• Wind turbine
• Steam engine