Physics Chemistry & Biology Test 3
Silicon is available is in form of
  • SiO2
  • SiO3
  • SiO
  • None of the above
Explanation:

Silicon is available in the form of: SiO2 (Silicon Dioxide)

Silicon, Germanium and Selenium are
  • Insulator
  • Conductor
  • Semi Conductor
  • None of the above
Explanation:
 

Silicon, Germanium, and Selenium are classified as semiconductors.

They have electrical conductivity between conductors and insulators, making them essential for various electronic devices, including diodes and transistors.

Electrical Insulators are ?
  • Diamond
  • Plastic material
  • Pure Water
  • All the above
Explanation:

All these materials—diamond, plastic, and pure water—are considered electrical insulators as they do not allow electric current to flow through them easily.

What are MCB which are used in electric circuits ?
  • Mini circuit breaker
  • Maximum circuit breaker
  • Miniature circuit breaker
  • Maxiature circuit breaker
Explanation:

MCBs are devices used in electric circuits to automatically switch off the circuit in case of overload or short circuit, providing protection to electrical circuits and appliances.

The minimum amount charge transferred from one body to another is equal to ?
  • Charge of Neutron
  • Charge of Proton
  • Charge of Electron
  • None of the above
Explanation:

The minimum amount of electric charge that can be transferred from one body to another is equal to the charge of a single electron, which is approximately −1.6×10 -19 coulombs.

Electric bulb was invented by ?
  • Newton
  • Henry
  • Thomas Alva Edison
  • None of the above
Explanation:

Thomas Edison is credited with inventing the practical electric light bulb in 1879, which led to the widespread use of electric lighting.

Can electric current used to make magnets ?
  • Yes
    • Explanation:

    Electric current can be used to create magnets. This phenomenon is known as electromagnetism, where an electric current flowing through a wire generates a magnetic field around it.

    When the wire is coiled and current flows through, it enhances the magnetic effect, allowing the wire to function as an electromagnet.