IGCSE U9 magnetism

What device is used to convert mechanical energy into electrical energy?

• a) Alternator
• b) Electric motor
• c) Dynamo
• d) Electromagnet

What force causes objects with opposite magnetic poles to move towards each other?

• a) Attraction
• b) Repulsion
• c) Friction
• d) Gravity

In an electrical circuit, what kind of wires conduct the electric current?

• a) Current-carrying wires
• b) Insulated wires
• c) Neutral wires
• d) Live wires

Which device converts electrical energy into mechanical energy?

• a) Electric motor
• b) Alternator
• c) Dynamo
• d) Electromagnet

What is the device that becomes magnetic when an electric current flows through it?

• a) Electromagnet
• b) Dynamo
• c) Alternator
• d) Electric motor

According to Fleming’s Left-Hand Rule, what does the thumb represent?

• a) Motion
• b) Magnetic field
• c) Current
• d) Force

What phenomenon occurs when a conductor moving through a magnetic field generates a potential difference across its ends?

• a) Fleming’s Right-Hand Rule
• b) Faraday's Law of Electromagnetic Induction
• c) Coulomb's Law
• d) Lenz's Law

What is a piece of iron that becomes magnetic when an electric current flows through a coil of wire wrapped around it?

• a) Electromagnet
• b) Generator
• c) Dynamo
• d) Transformer

What instrument is used to detect the presence of a magnetic field?

• a) Electromagnet
• b) Dynamo
• c) Generator
• d) Magnetic compass

What effect is responsible for the production of electricity in a generator?

• a) Motor effect
• b) Faraday's law
• c) Fleming's Left-Hand Rule
• d) Lenz's Law