- 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) Thomas Edison
C) Michael Faraday
D) Nikola Tesla
- 2. What device is used to measure electric current?
A) Capacitance meter
B) Ohmmeter
C) Ammeter
D) Voltmeter
- 3. What is the unit of electric charge?
A) Volt
B) Ohm
C) Coulomb
D) Ampere
- 4. What did Alessandro Volta invent?
A) The electromagnet
B) The light bulb
C) The transformer
D) The voltaic pile
- 5. Which scientist discovered electromagnetic induction?
A) Heinrich Hertz
B) Anders Jonas Ångström
C) Michael Faraday
D) James Clerk Maxwell
- 6. What is the main component of a simple electric circuit?
A) A power source
B) A capacitor
C) A relay
D) A transformer
- 7. Who discovered the electron?
A) Ernest Rutherford
B) Niels Bohr
C) J.J. Thomson
D) James Chadwick
- 8. What is the purpose of a capacitor in a circuit?
A) Amplify signals
B) Store electrical energy
C) Regulate voltage
D) Detect current
- 9. What is the function of a resistor?
A) Convert AC to DC
B) Increase voltage
C) Amplify current
D) Limit current flow
- 10. What unit is used to measure electrical resistance?
A) Ampere
B) Ohm
C) Volt
D) Watt
- 11. What is static electricity?
A) Flow of current
B) Accumulation of charge on a surface
C) Electric fields in motion
D) Loss of electrical energy
- 12. What type of current do batteries supply?
A) Direct Current (DC)
B) Pulsating Current
C) Alternating Current (AC)
D) Residual Current
- 13. What principle explains the operation of a transformer?
A) Resistance
B) Capacitance
C) Electrolysis
D) Electromagnetic induction
- 14. What device converts electrical energy into mechanical energy?
A) Generator
B) Capacitor
C) Transformer
D) Electric motor
- 15. What is the basic unit of electric current?
A) Watt
B) Ohm
C) Volt
D) Ampere
- 16. Who formulated the electromagnetic theory?
A) Nikola Tesla
B) Michael Faraday
C) Albert Einstein
D) James Clerk Maxwell
- 17. What is the term for the opposition to the flow of electric current?
A) Resistance
B) Capacitance
C) Impedance
D) Reactance
- 18. What does a transformer do?
A) Changes voltage levels.
B) Measures current.
C) Stores energy.
D) Generates power.
- 19. In what unit is electric power measured?
A) Watt
B) Volt
C) Coulomb
D) Joule
- 20. What instrument is used to measure electric voltage?
A) Voltmeter
B) Ammeter
C) Ohmmeter
D) Galvanometer
- 21. What is the primary function of a diode?
A) Store electric charge
B) Allow current to flow in one direction
C) Amplify current
D) Regulate voltage
- 22. What is the phenomenon where a current-carrying conductor creates a magnetic field?
A) Thermodynamics
B) Electromagnetism
C) Electrolysis
D) Eddy Current
- 23. What is the primary use of a galvanometer?
A) Measure resistance
B) Measure voltage
C) Measure frequency
D) Measure small currents
- 24. What happens to the frequency of AC when it is stepped down in a transformer?
A) It remains the same
B) It halves
C) It becomes zero
D) It doubles
- 25. What is the dominant charge on an electron?
A) Negative
B) Variable
C) Positive
D) Neutral
- 26. In what year did Benjamin Franklin conduct his famous kite experiment?
A) 1752
B) 1801
C) 1776
D) 1740
- 27. What phenomenon occurs when electric charges build up on an object?
A) Electromagnetism
B) Current Electricity
C) Magnetism
D) Static Electricity
- 28. Who invented the first practical light bulb?
A) Alexander Graham Bell
B) Thomas Edison
C) Nikola Tesla
D) James Watt
- 29. Which particle is positively charged?
A) Neutron
B) Electron
C) Proton
D) Photon
- 30. What did Benjamin Franklin use to demonstrate electricity?
A) A metal rod
B) A kite
C) A glass jar
D) A balloon
- 31. Which scientist is known for his work on the photoelectric effect?
A) Albert Einstein
B) Isaac Newton
C) Niels Bohr
D) James Clerk Maxwell
- 32. What does a circuit breaker do?
A) Increases current flow
B) Stores energy
C) Limits voltage
D) Automatically breaks the circuit under excess current
- 33. Who is credited with inventing the first practical electrical battery?
A) Thomas Edison
B) Alessandro Volta
C) Michael Faraday
D) Nikola Tesla
- 34. Which law relates voltage, current, and resistance?
A) Faraday's Law
B) Newton's Law
C) Ohm's Law
D) Kirchhoff's Law
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