Physics 101 guide on top!

How does an electromagnet function?

• Current flows. Iron core becomes magnetized. Current stops. Iron core becomes demagnetized

• Current flows. Iron core induces an EMF. Current stops. Iron core stops inducing EMF.

• Voltage flows. Iron core becomes magnetized. Current stops. Iron core become demagnetized

• uhm... what the sigma

How a motor works?

• CCC has a B. Both magnetic fields interact. A kinetic force is produced.

• CCC has a A. Both magnetic fields interact. A resultant force is created

• CCC has a B. Perm magnet also has a B. Both magnetic fields interact. A resultant force is created

• CCC has a B. temp magnet also has a B. Both magnetic fields interact. A resultant force is created

Electromagnetic Induction is when a conductor cuts the lines of an?

How a transformer functions?

• When voltage flows, iron core is magnetized. A.C produces a changing magnetic field. The changing field across the secondary coil induces an EMF

• When current flows, cooper core is magnetized. A.C produces a changing current field. The changing field across the secondary coil induces an EMF

• When current flows, iron core is magnetized. A.C produces a changing magnetic field. The changing field across the secondary coil induces an EMF

• When current flows, iron core is demagnetized. A.C produces a changing magnetic field. The changing field across the secondary coil induces an EMF

Alpha particles are known as?

• Gamma rays
• Protons
• Neon

• Helium nuclei

The nature of Alpha particles?

• Positively charged particles consisting of two protons and two neutrons.
• Neutral particles consisting of two protons and two electrons.
• Negatively charged particles consisting of two protons and two neutrons.
• Particles with no charge consisting of two electrons and two neutrons.

Ionizing power of Alpha particles?

• Low
• High
• Medium
• Non-existent

Beta particles charge?

• Positive
• Zero
• Neutral
• Negative

Beta particles nature?

• A slow moving electron

• Neutrons
• Low-energy protons
• fast moving and high energy electrons

Ionizing power of Beta particles?

• High(as much as Alpha)

• Moderate
• Low
• Zero