History
Who experimented with static electricity using amber in 600 B.C.?
A. Thomas Edison
B. Benjamin Franklin
C. Thales of Miletus
D. Nikola Tesla
C. Thales of Miletus
What converts mechanical energy into electrical energy?
A. Transformer
B. Generator
C. Battery
D. Circuit breaker
B. Generator
What percentage of total construction cost is typically electrical in schools?
A. 8–12%
B. 1–5%
C. 20–30%
D. 40–50%
A. 8–12%
Which is a risk of electricity?
A. Cold
B. Shock
C. Wind
D. Pressure
B. Shock
Which statement best describes the development of electricity?
A. It was invented by one scientist
B. It was discovered and developed over time by many researchers
C. It was created during the Industrial Revolution only
D. It was first used in modern buildings
B. It was discovered and developed over time by many researchers
What is the main purpose of a generator?
A. Store electricity
B. Convert electrical energy into heat
C. Convert mechanical energy into electrical energy
D. Reduce voltage
C. Convert mechanical energy into electrical energy
Why do hospitals have higher electrical costs than schools?
A. Smaller buildings
B. Less equipment
C. Backup power and life-safety systems
D. Fewer circuits
C. Backup power and life-safety systems
What increases the risk of electrical shock?
A. Proper insulation
B. Dry hands
C. Damaged wires
D. Low current
C. Damaged wires
What major contribution did Thomas Edison make to electricity?
A. Discovered atoms
B. Created wind energy
C. Built the first generator
D. Developed the light bulb and power distribution system
D. Developed the light bulb and power distribution system
What are the three key factors in electricity?
A. Power, Energy, Heat
B. Voltage, Current, Resistance
C. Speed, Force, Pressure
D. Watt, Volt, Amp
B. Voltage, Current, Resistance
What is a key reason electrical costs vary between building types?
A. Paint color
B. Roof size
C. Number of windows
D. Power demand and system design
D. Power demand and system design
What role do circuit breakers and fuses play?
A. Increase power
B. Store electricity
C. Create voltage
D. Protect systems by stopping excessive current
D.Protect systems by stopping excessive current