- 1. Experiments and Observations on Electricity is a landmark work that profoundly shaped the understanding of electrical phenomena in the 18th century. In this seminal work, Benjamin Franklin meticulously detailed his extensive investigations into the nature of electricity, employing innovative methods and keen observational skills to explore the behavior of electric charges. Franklin's famous kite experiment, where he flew a kite during a thunderstorm to demonstrate the electrical nature of lightning, became a cornerstone of his research and a pivotal moment in the history of science. He introduced crucial concepts such as the distinction between positive and negative charges, the conservation of charge, and the theory of electric fluid, which laid the groundwork for future explorations in electromagnetism. Franklin's observations were not merely theoretical; he also engaged in practical applications, inventing devices like the lightning rod to protect buildings from electrical storms. His clear and eloquent prose made complex ideas accessible to a broad audience, fostering a greater public understanding of electricity. The work is significant not only for its scientific contributions but also for its influence on subsequent generations of scientists and inventors, inspiring further research and development in the field of electricity and revealing the profound impact of this mysterious force on both nature and society.
Who is known as the 'father of electricity'?
A) Benjamin Franklin
B) Nikola Tesla
C) Michael Faraday
D) Thomas Edison
- 2. What device is used to measure electric current?
A) Voltmeter
B) Ohmmeter
C) Ammeter
D) Capacitance meter
- 3. What is the unit of electric charge?
A) Ohm
B) Ampere
C) Coulomb
D) Volt
- 4. What did Alessandro Volta invent?
A) The voltaic pile
B) The light bulb
C) The transformer
D) The electromagnet
- 5. Which scientist discovered electromagnetic induction?
A) Heinrich Hertz
B) Michael Faraday
C) James Clerk Maxwell
D) Anders Jonas Ångström
- 6. What is the main component of a simple electric circuit?
A) A capacitor
B) A relay
C) A power source
D) A transformer
- 7. Who discovered the electron?
A) J.J. Thomson
B) James Chadwick
C) Ernest Rutherford
D) Niels Bohr
- 8. What is the purpose of a capacitor in a circuit?
A) Detect current
B) Regulate voltage
C) Store electrical energy
D) Amplify signals
- 9. What is the function of a resistor?
A) Limit current flow
B) Amplify current
C) Convert AC to DC
D) Increase voltage
- 10. What unit is used to measure electrical resistance?
A) Ampere
B) Ohm
C) Watt
D) Volt
- 11. What is static electricity?
A) Electric fields in motion
B) Flow of current
C) Loss of electrical energy
D) Accumulation of charge on a surface
- 12. What type of current do batteries supply?
A) Alternating Current (AC)
B) Pulsating Current
C) Direct Current (DC)
D) Residual Current
- 13. What principle explains the operation of a transformer?
A) Capacitance
B) Resistance
C) Electromagnetic induction
D) Electrolysis
- 14. What device converts electrical energy into mechanical energy?
A) Capacitor
B) Electric motor
C) Generator
D) Transformer
- 15. What is the basic unit of electric current?
A) Volt
B) Ampere
C) Ohm
D) Watt
- 16. Who formulated the electromagnetic theory?
A) James Clerk Maxwell
B) Albert Einstein
C) Nikola Tesla
D) Michael Faraday
- 17. What is the term for the opposition to the flow of electric current?
A) Reactance
B) Resistance
C) Capacitance
D) Impedance
- 18. What does a transformer do?
A) Generates power.
B) Changes voltage levels.
C) Measures current.
D) Stores energy.
- 19. In what unit is electric power measured?
A) Coulomb
B) Watt
C) Volt
D) Joule
- 20. What instrument is used to measure electric voltage?
A) Galvanometer
B) Voltmeter
C) Ohmmeter
D) Ammeter
- 21. What is the primary function of a diode?
A) Regulate voltage
B) Amplify current
C) Store electric charge
D) Allow current to flow in one direction
- 22. What is the phenomenon where a current-carrying conductor creates a magnetic field?
A) Thermodynamics
B) Electromagnetism
C) Eddy Current
D) Electrolysis
- 23. What is the primary use of a galvanometer?
A) Measure frequency
B) Measure voltage
C) Measure small currents
D) Measure resistance
- 24. What happens to the frequency of AC when it is stepped down in a transformer?
A) It halves
B) It becomes zero
C) It doubles
D) It remains the same
- 25. What is the dominant charge on an electron?
A) Variable
B) Neutral
C) Negative
D) Positive
- 26. In what year did Benjamin Franklin conduct his famous kite experiment?
A) 1740
B) 1752
C) 1776
D) 1801
- 27. What phenomenon occurs when electric charges build up on an object?
A) Current Electricity
B) Magnetism
C) Static Electricity
D) Electromagnetism
- 28. Who invented the first practical light bulb?
A) Alexander Graham Bell
B) Nikola Tesla
C) James Watt
D) Thomas Edison
- 29. Which particle is positively charged?
A) Electron
B) Photon
C) Proton
D) Neutron
- 30. What did Benjamin Franklin use to demonstrate electricity?
A) A kite
B) A balloon
C) A glass jar
D) A metal rod
- 31. Which scientist is known for his work on the photoelectric effect?
A) Niels Bohr
B) James Clerk Maxwell
C) Albert Einstein
D) Isaac Newton
- 32. What does a circuit breaker do?
A) Stores energy
B) Limits voltage
C) Increases current flow
D) Automatically breaks the circuit under excess current
- 33. Who is credited with inventing the first practical electrical battery?
A) Nikola Tesla
B) Thomas Edison
C) Alessandro Volta
D) Michael Faraday
- 34. Which law relates voltage, current, and resistance?
A) Ohm's Law
B) Kirchhoff's Law
C) Newton's Law
D) Faraday's Law
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