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