Electronic and Magnetic Materials - Quiz
- 1. What is the basic unit of an electromagnetic field?
A) Electron
B) Proton
C) Neutron
D) Photon
- 2. Which material is known for its high electrical conductivity?
A) Copper
B) Plastic
C) Glass
D) Rubber
- 3. What material is widely used in computer hard drives for data storage?
A) Titanium
B) Carbon
C) Aluminum
D) Ferrite
- 4. Which of the following materials is a semiconductor?
A) Silver
B) Copper
C) Gold
D) Silicon
- 5. What type of material does not allow electric current to flow freely?
A) Dielectric
B) Insulator
C) Semiconductor
D) Conductor
- 6. What is the process of creating an electric current in a closed circuit by changing the magnetic field around the circuit?
A) Photoelectric effect
B) Thermionic emission
C) Piezoelectric effect
D) Electromagnetic induction
- 7. What is the property of a material that allows it to respond to an applied magnetic field by becoming magnetized?
A) Magnetic susceptibility
B) Young's modulus
C) Thermal conductivity
D) Electrical resistance
- 8. Which material is used as a core in transformers due to its high magnetic permeability?
A) Plastic
B) Iron
C) Aluminum
D) Copper
- 9. What type of material becomes magnetized in the presence of an external magnetic field and retains some magnetization when the field is removed?
A) Ferromagnetic
B) Superconductive
C) Diamagnetic
D) Non-magnetic
- 10. What is the phenomenon where a material retains some magnetization when an external magnetic field is removed?
A) Polarization
B) Diffusion
C) Resonance
D) Hysteresis
- 11. Which material is commonly used as a permanent magnet?
A) Copper
B) Plastic
C) Aluminum
D) Neodymium
- 12. What property of a material determines its ability to store energy in an electromagnetic field?
A) Conductivity
B) Susceptibility
C) Resistivity
D) Permittivity
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