Q. An ohmmeter is used to measure:

  • (A) Electric current
  • (B) Electrical resistance
  • (C) Voltage
  • (D) Power
๐Ÿ“ Notes
โœ… Correct Answer: (B) Electrical resistance
Explanation: An ohmmeter measures electrical resistance in ohms.

Q. A periscope is mainly used in:

  • (A) Aircraft
  • (B) Submarines
  • (C) Satellites
  • (D) Spacecraft
๐Ÿ“ Notes
โœ… Correct Answer: (B) Submarines
Explanation: A periscope allows viewing objects above sea level from a submarine.

Q. A pyrometer is used to measure:

  • (A) Very high temperature
  • (B) Humidity
  • (C) Wind speed
  • (D) Water pressure
๐Ÿ“ Notes
โœ… Correct Answer: (A) Very high temperature
Explanation: A pyrometer measures very high temperatures.

Q. Radar detects aircraft using:

  • (A) Infrared rays
  • (B) Ultraviolet rays
  • (C) Radio waves
  • (D) Sound waves
๐Ÿ“ Notes
โœ… Correct Answer: (C) Radio waves
Explanation: Radar detects the direction and range of aircraft using radio waves.

Q. Who formulated the Laws of Motion?

  • (A) Isaac Newton
  • (B) Galileo Galilei
  • (C) Johannes Kepler
  • (D) Albert Einstein
๐Ÿ“ Notes
โœ… Correct Answer: (A) Isaac Newton
Explanation: Sir Isaac Newton formulated the three Laws of Motion.

Q. The law of electrostatic attraction is associated with:

  • (A) Ohm
  • (B) Faraday
  • (C) Coulomb
  • (D) Ampere
๐Ÿ“ Notes
โœ… Correct Answer: (C) Coulomb
Explanation: Charles-Augustin de Coulomb formulated Coulomb's law of electrostatic attraction.

Q. John Dalton is best known for his work on:

  • (A) Electron
  • (B) Atom
  • (C) Proton
  • (D) Neutron
๐Ÿ“ Notes
โœ… Correct Answer: (B) Atom
Explanation: John Dalton proposed the atomic theory.

Q. Ohm's law is related to:

  • (A) Magnetism
  • (B) Electric resistance
  • (C) Radioactivity
  • (D) Gravity
๐Ÿ“ Notes
โœ… Correct Answer: (B) Electric resistance
Explanation: Ohm's law explains the relationship between voltage, current, and resistance.

Q. Who gave the Law of Flotation?

  • (A) Archimedes
  • (B) Pascal
  • (C) Newton
  • (D) Galileo
๐Ÿ“ Notes
โœ… Correct Answer: (A) Archimedes
Explanation: Archimedes is associated with the law of flotation.

Q. Electromagnetic induction was discovered by:

  • (A) James Clerk Maxwell
  • (B) Michael Faraday
  • (C) Nikola Tesla
  • (D) Heinrich Hertz
๐Ÿ“ Notes
โœ… Correct Answer: (B) Michael Faraday
Explanation: Michael Faraday discovered electromagnetic induction.

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